instruction and data, nonblocking, levelone cache: separate 16 KB instruction and
16 KB data caches.
■ Integrated thermal diode.
The Intel® Celeron® processor is designed for uni-processor based Value PC desktops and is
binary compatible with previous generation Intel architecture pro cessors. The Celero n processor
provides good performance for applications running on advanced operating systems such as
Microsoft* Windows*98, Windows NT*, Windows* 2000, Windows XP* and Linux*. This is
achieved by integrating the best attributes of Intel processors—the dynamic execution
performance of the P6 microarchitecture plus the capabilities of MMX™ technology—bringing
a balanced level of performance to the Value PC market segment. The Celeron processor offers
the dependability you would expect from Intel at an exceptional value. Systems based on
Celeron processors also include the latest features to simplify s ystem managemen t and lower the
cost of ownership for small business and home environments.
PPGA Package
S.E.P. PackageFC-PGA2 PackageFC-PGA Package
Document Number: 243658-020
January 2002
Information in this document is provided in connection with Intel® products. No license, express or implied, by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Intel’s T erms and Conditions of Sale for such products, Intel assumes no liability
whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to
fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not
intended for use in medical, life saving, or life sustaining applications.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for
future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to the m.
®
The Intel
Celeron® processor may contain design defects or errors known as errata which may cause the product to deviate from published specifi-
cations. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be obtained by calling
1-800-548-4725 or by visiting Intel’s website at http://www.intel.com.
Intel, Celeron, Pentium, MMX and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States
and other countries.
*Other names and brands may be claimed as the property of others.
• Added IHS specifications for 900 MHz, 950 MHz, and 1 GHz.
• Added 566 MHz specification for CPUID of 068Ah.
Datasheet9
Intel® Celeron® Processor up to 1.10 GHz
This page is intentionally left blank.
10Datasheet
1.0Introduction
®
Intel
Celeron® Processor up to 1.10 GHz
The Intel® Celeron® processor is based on the P6 microarchitecture and is optimized for the Value
PC market segment. The Intel Celeron processor, like the Pentium
Dynamic Execution microarchitecture and executes MMX™ technology instructions for enhanced
media and communication performance. The Intel Celeron processor also utilizes multiple lowpower states such as AutoHALT, S t o p-Grant , Sleep, and Deep Sleep to con serv e p ower dur ing idle
times.
The Intel Celeron processor is capabl e of running today ’ s mos t common PC appli cations with up to
4 GB of cacheable memory space. As this processor is intended for Value PC systems, it does not
provide multiprocessor support. The Pentium II and Pentium
multiprocessor system designs.
To be cost-effective at both the processor and system level, the Intel Celeron processor utilizes
cost-effective packaging technologies. They are the S.E.P. (Single-Edge Processor) package, the
PPGA (Plastic Pin Grid Array) package, the FC-PGA (Flip-Chip Pin Grid Array) package, and the
FC-PGA2 (Flip-Chip Pin Grid Array) package. Refer to the Intel
Specification Update for the latest packaging and frequency support information (Order Number
243337).
Note:This datasheet describes the Intel Celeron processor for the PPGA package, FC-PGA/FC-PGA2
packages, and the S.E.P. Package versions. Unless otherwise specified, the information in this
document applies to all versions and information on PGA packages, refer to both PPGA and
FC-PGA packages.
1.1Terminology
®
II processor, features a
®
III processors should be used for
®
Celeron® Processor
In this document, a ‘#’ symbol after a signal name refers to an active low signal. This means that a
signal is in the active state (based on the name of the signal) when driven to a low level. For
example, when FLUSH# is low, a flush has been requested. When NMI is high, a nonmaskable
interrupt has occurred. In the case of signals where the name does not imply an active state but
describes part of a binary seq uence (such as address or data), the ‘#’ symbol implies that the signal
is inverted. For example, D[3:0] = ‘HLHL’ refers to a hex ‘A ’, and D[3:0]# = ‘LHLH’ also refers to
a hex ‘A’ (H= High logic level, L= Low logic level).
The term “system bus” refers to the interface between the processor, system core logic (a.k.a. the
AGPset components), and other bus agents. The system bus is an interface to the processor,
memory, and I/O.
Datasheet11
®
Intel
Celeron® Processor up to 1.10 GHz
1.1.1Package Terminology
The following terms are used often in this document and are explained here for clarification:
• Processor substrate—The structure on which passive components (resistors and capacitors)
• S.E.P. Package—Single-Edge Processor Package, which consists of a processor substrate,
processor core, and passive compone nts. This package d iffers f rom the S.E.C. C artridge as this
processor has no external plastic cover, thermal plate, or latch arms.
• PPGA package—Plastic Pin Grid Array package. The package is a pinned laminated printed
circuit board structure.
• FC-PGA — Flip-Chip Pin Grid Array. The FC-PGA uses the same 370-pin zero insertion
force socket (PGA370) as the PPGA. Thermal solutions are attached directly to the back of the
processor core package without the use of a thermal plate or heat spreader.
• FC-PGA2 — Flip Chip Pin Gr id Array 2. The FC-P G2A uses t he same 370 -pin zero inser tion
force socket (PGA370) as the PPGA. The FC-PGA2 package contains an Integrated Heat
Spreader that covers the processor die.
• Keepout zone - The area on or near a FC-PGA/FC-PGA2 packaged processor that system
designs can not utilize.
• Keep-in zone - The area of a FC-PGA packaged processor that thermal solutions may utilize.
Additional terms referred to in this and other related documentation:
• SC242—242-contact slot connector. A processor in the S.E.P. Package uses this connector to
interface with a system board.
• 370-pin socket (PGA370)—The zero insertion force (ZIF) socket in which a processor in the
PPGA package will use to interface with a system board.
• Retention mechanism—A mechanical assembly which holds the package in the SC242
connector.
12Datasheet
1.1.2Processor Naming Convention
A letter(s) is added to certain processo rs (e.g ., 5 33 A MHz) when the core frequency alone may not
uniquely identify the processor. Below is a summary of what each letter means as well as a table
listing all the FC-PGA/FC-PGA2 processors for the PGA370 socket.
Celeron® Processor Specification Update for the exact CPUID for each processor.
Datasheet13
®
Intel
Celeron® Processor up to 1.10 GHz
1.2References
The reader of this specification should also be familiar with material and concepts presented in the
following documents:
• AP-485, Intel
• AP-589, Design for EMI (Order Number 243334)
• AP-900, Identifying Support for Streaming SIMD Extensions in the Processor and Operating
• AP-905, Pentium
• AP-907, Pentium
• Intel
• Intel
• Intel
• Intel
• 370-Pin Socket (PGA370) Design Guidelines (Order Number 244410)
• Intel
1
System
®
Pentium® III Processor for the PGA370 Socket at 500 MHz to 933 MHz Datasheet
(Order Number 245264)
®
Pentium® III Processor Thermal Metrology for CPUID 068h Family
®
Pentium® III Processor Software Application Development Application Notes
®
Celeron® Processor Specification Update (Order Number 243748)
®
Architecture Software Developer's Manual (Order Number 243193)
®
Processor Identification and the CPUID Instruction (Order Number 241618)
1
®
III Processor Thermal Design Guidelines
®
III Processor Power Distribution Guidelines
1
1
1
1
1
— Volume I: Basic Architecture (Order Number 243190)
— Volume II: Instruction S et Ref erence (Order Number 243191)
— Volume III: System Programming Guide (Order Number 243192)
®
• Intel
• Intel
440EX AGPset Design Guide (Order Number 290637)
®
Celeron® Processor with the Intel® 440LX AGPset Design Guide
(Order Number 245088)
®
• Intel
• Intel
440BX AGPset Design Guide (Order Number 290634)
®
Celeron® Processor with the Intel® 440ZX-66 AGPset Design Guide
(Order Number 245126)
®
• Intel
Celeron® Processor (PPGA) at 466 MHz Thermal Solutions Guidelines
(Order Number 245156)
Notes:
1. This reference material can be found on the Intel Developer’s Web site located at
http://developer.intel.com.
2. For a complete listing of the Intel
®
Celeron® processor reference material, refer to the Intel
Developer’s Web site when this processor is formally launched. The Web site is located at
http://developer.intel.com/design/celeron/.
14Datasheet
2.0Electrical Specifications
2.1System Bus and VREF
®
Intel
Celeron® Processor up to 1.10 GHz
Celeron processor signals use a variation of the low voltage Gunning Transceiver Logic (GTL)
signaling technology. The Intel
Celeron processor system bus specification is similar to the GTL
specification, but has been enhanced to provide larger noise margins and reduced ringing. The
improvements are accomplished by increasing the termination voltage level and controlling the
edge rates. Because this specification is dif ferent f rom the stand ard GTL specification, it is referred
to as Assisted Gunning Transceiver Logic (AGTL+) in this document.
The Celeron processor varies from the Pentium Pro processor in its output buffer implementation.
The buffers that drive the system bus signals on the Celeron processor are actively driven to
V
CC
for one clock cycle during the low-to-high transition. This improves rise times and
CORE
reduces overshoot. These signals should still be considered open-drain and require termination to a
supply that provides the logic-high signal level.
The AGTL+ inputs use differential receivers which require a reference signal ( V
REF). VREF is used
by the receivers to determine if a signal is a logic-high or a logic-low, and is provided to the
processor core by either the processor substrate (S.E.P. Package) or the motherboard (PGA370
socket). Local V
REF copies should be generate d on the motherboard for all other devices on the
AGTL+ system bus.
Termination is used to pull the bus up to the high voltage level and to control reflections on the
transmission line. The processor may contain termination resistors (S.E.P. Package, FC-PGA
Package, and FC-PGA2 Package) that provide termination for one end of the Intel Celeron
processor system bus. Otherwise, this termination must exist on the motherboard.
Solutions exist for single-ended termination as well, though this implementation changes system
design and eliminate backwards compatibility for Celeron processors in the PPGA package.
Single-ended termination designs must still provide an AGTL+ termination resistor on the
motherboard for the RESET# signal.
The AGTL+ bus depends on incident wave switching. Therefore timing calculations for AGTL+
signals are based on motherboard flight time as opposed to capacitive deratings. Analog signal
simulation of the Intel Celeron processor system bus, including trace lengths, is highly
recommended when designing a system. See the Pentium
and the Pentium
®
II Processor I/O Buffer Models, Quad Format (Electronic Form) for details.
®
II Processor AG TL+ Layout Guidelines
2.2Clock Control and Low Power St ates
Celeron processors allow the use of AutoHALT, Stop-Grant, Sleep, and Deep Sleep states to reduce
power consumption by stopping the clock to internal sections of the processor, depending on each
particular state. See Figure 1 for a visual representation of the Intel Celeron processor low power
states.
For the processor to fully realize the low current consumption of the Stop-Grant, Sleep, and Deep
Sleep states, a Model Specific Register (MSR) bit must be set. For the MSR at 02Ah (hex), bit 26
must be set to a ‘1’ (this is the power on default setting) for the processor to stop all internal clocks
during these modes. For more information, see the Pentium
(Order Number 243502).
Datasheet15
®
II Processor Developer's Manual
®
Intel
Celeron® Processor up to 1.10 GHz
2.2.1Normal State—State 1
This is the normal operating state for the processor.
2.2.2Aut oHALT Power Down State—State 2
AutoHALT is a low power state entered when the processor executes the HALT instruction. The
processor will transition to the Normal state upon the occurrence of SMI#, BINIT#, INIT#, or
LINT[1:0] (NMI, INTR). RESET# will cause the processor to immediately initialize itself.
The return from a System Management Interrupt (SMI) handler can be to either Normal Mode or
the AutoHALT Power Down state. See the Intel Architecture Software Developer's Manual, Volume III: System Programmer's Guide (Order Number 243192) for more information.
FLUSH# will be serviced during the AutoHALT state, and the processor will return to the
AutoHALT state.
The system can generate a STPCLK# while the processor is in the AutoHALT Power Down state.
When the system deasserts the STPCLK# interrupt, the processor will return execution to the
HALT state.
Figure 1. Clock Control State Machine
2. Auto HALT Power Down State
BCLK running.
Snoops and interrupts allowed.
Snoop
Event
Occurs
4. Auto HALT Power Down State
BCLK running.
Snoops and interrupts allowed.
Snoop
Event
Serviced
HALT Instruction and
HALT Bus Cycle generated
INIT#, BINIT#, INTR, SMI#,
RESET#
STPCLK# Deasserted
and Stop Grant entered
from Auto HALT.
Snoop event occurs
Snoop event serviced
1. Normal State
Normal execution.
STPCLK#
asserted
3. Stop Grant State
BCLK running.
Snoops and interrupts allowed.
SLP#
asserted
5. Sleep State
BCLK running.
Snoops and interrupts allowed.
BCLK
input
stopped
STPCLK#
deasserted
SLP#
deasserted
BCLK
input
restarted
6. Deep Sleep State
BCLK stopped.
No Snoops and interrupts allowed.
16Datasheet
2.2.3Stop-Grant State—State 3
The Stop-Grant state on the processor is entered when the STPCLK# signal is asserted.
Since the AGTL+ signal pins receive power from the system bus, these pins should not be driven
(allowing the level to return to V
state. In addition, all other input pins on the system bus should be driven to the inactive state.
BINIT# will not be serviced while the processor is in Stop-Grant state. The event will be latched
and can be serviced by software upon exit from Stop-Grant state.
FLUSH# will not be serviced during Stop-Grant state.
RESET# will cause the processor to immediately initialize itself, but the processor will stay in
Stop-Grant state. A transition back to the Normal state will occur with the deassertion of the
STPCLK# signal.
A transition to the HALT/Grant Snoop state will occur when the processor detects a snoop on the
system bus (see Section 2.2.4). A transition to the Sleep state (see Section 2.2.5) will occur with the
assertion of the SLP# signal.
While in the Stop-Grant State, SMI#, INIT#, and LINT[1:0] will be latched by the processor, and
only serviced when the processor returns to the Normal State. Only one occurrence of each event
will be recognized upon return to the Normal state.
TT) for minimum power drawn by t he te rm inat i on res ist o rs in th i s
®
Intel
Celeron® Processor up to 1.10 GHz
2.2.4HALT/Grant Snoop State—State 4
The processor will respond to snoop transactions on the Celeron processor system bus while in
Stop-Grant state or in AutoHALT Power Down state. During a snoop transaction, the processor
enters the HAL T/Gran t Snoop state. The processor will stay in this state until the snoop on the Intel
Celeron processor system bus has been serviced (whether by the processor or another agent on the
Intel Celeron processor system bus). After the snoop is serviced, the processor will return to the
Stop-Grant state or AutoHALT Power Down state, as appropriate.
2.2.5Sleep State—State 5
The Sleep state is a very low power state in which the processor maintains its context, maintains
the phase-locked loop (PLL), and has stopped all internal clocks. The Sleep state can only be
entered from Stop-Grant state. Once in the Stop-Grant state, the SLP# pin can be asserted, causing
the processor to enter the Sleep state. The SLP# pin is not recognized in the Normal o r AutoHALT
states.
Snoop events that occur while in Sleep State or during a transition into or out of Sleep state will
cause unpredictable behavior.
In the Sleep state, the processor is incapable of responding to snoop transactions or latching
interrupt signals. No transitions or assertions of signals (with the exception of SLP# or RESET#)
are allowed on the system bus while the processor is in Sleep state. Any transition on an input
signal before the processor has returned to Stop-Grant state will result in unpredictable behavior.
If RESET# is driven active while the processor is in the Sleep state, and held active as specified in
the RESET# pin specification, then the processor will reset itself, ignoring the transition through
Stop-Grant State. If RESET# is driven active while the processor is in the Sleep State, the SLP#
and STPCLK# signals should be deasserted immediately after RESET# is asserted to ensure the
processor correctly executes the Reset sequence.
Datasheet17
®
Intel
Celeron® Processor up to 1.10 GHz
While in the Sleep state, the processor is capable of entering its lowest power state, the Deep Sleep
state, by stopping the BCLK input. (See Section 2.2.6.) Once in the Sleep state, the SLP# pin can
be deasserted if another asynchronous system bus event occurs. The SLP# pin has a minimum
assertion of one BCLK period.
2.2.6Deep Sleep State—State 6
The Deep Sleep state is the lowest power state the processor can enter while maintaining context.
The Deep Sleep state is entered by stopping the BCLK input (after the Sleep state was entered from
the assertion of the SLP# pin). The processor is in Deep Sleep state immediately after BLCK is
stopped. It is recommended that the BLCK input b e held low durin g the Deep Sleep S tate. Stop ping
of the BCLK input lowers the overall current consumption to leakage levels.
To re-enter the Sleep state, the BCLK input must be restarted. A period of 1 ms (to allow for PLL
stabilization) must occur before the processor can be considered to be in the Sleep State. Once in
the Sleep state, the SLP# pin can be deasserted to re-enter the Stop-Grant state.
While in Deep Sleep state, the processor is incapable of responding to snoop transactions or
latching interrupt signals. No transitions or assertions of signals are allowed on the system bus
while the processor is in Deep Sleep state. Any transition on an input signal before the processor
has returned to Stop-Grant state will result in unpredictable behavior.
2.2.7Clock Control
BCLK provides the clock signal for the processor and on die L2 cache. During AutoHALT Power
Down and Stop-Grant states, the processor processes a system bus snoop. The processor does not
stop the clock to the L2 cache during AutoHALT Power Down or Stop-Grant states. Entrance into
the Halt/Grant Snoop state allows the L2 cache to be snooped, similar to the Normal state.
When the processor is in the Sleep or Deep Sleep states, it does not respond to interrupts or snoop
transactions. During the Sleep state, the internal clock to the L2 cache is not stopped. During the
Deep Sleep state, the internal clock to the L2 cache is stopped. The internal clock to the L2 cache
will be restarted only after the internal clocking mechanism for the processor is stable (i.e., the
processor has re-entered Sleep state).
PICCLK should not be removed during the AutoHALT Power Down or Stop-Grant states.
PICCLK can be removed during the Sleep or Deep Sleep states. When transitioning from the Deep
Sleep state to the Sleep state, PICCLK must be restarted with BCLK.
2.3Power and Ground Pins
There are five pins defined on the S.E.P. Package for voltage identification (VID) and four pins on
the PPGA, FC-PGA, and FC-PGA2 packages. These pins specify the voltage required by the
processor core. These have been added to cleanly support voltage specification variations on
current and future Celeron processors.
For clean on-chip power distribution, Intel Celeron processors in the S.E.P. Package have 27 V
(power) and 30 V
voltage levels to the components. V
pins, while 4 V
For only the S.E.P. Package, one V
CC
V
must remain electrically separated from each other.
CORE
SS (ground) inputs. The 27 VCC pins are further divided to provide the different
CC
TT inputs (1.5 V) are used to provide a AGTL+ termination voltage to the processor .
CC
5
inputs for the processor core account for 19 of the VCC
CORE
pin is provided for Voltage Transient Tools. VCC5 and
CC
18Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
The PPGA package has more power (88) and ground (80) pins than the S.E.P. Package. Of the
power pins, 77 are used for the processor core (V
voltage (V
REF). The other 3 power pins are VCC
CC
1.5
) and 8 are used as a AGTL+ reference
CORE
, VCC
and VCC
2.5
and are used for future
CMOS
processor compatibility.
FC-PGA/FC-PGA2 packages have 77 V
V
CC
, and one VCC
2.5
cache. The V
The V
CC
CMOS
a design, the V
REF inputs are used as the AGTL+ reference voltage for the processor.
pin is provided as a feature for future processor support in a flexible design. In such
CC
CMOS
. VCC
CMOS
CORE
pin is used to provide the CMOS voltage for use by the platform.
CC
inputs supply the processor core, including the on-die L2
Additionally, 2.5 V must be provided to the V
input. The processor routes the CMOS voltage level through the package that it is compatible with.
For example, processors requiring 1.5 V CMO S vol ta ge level s rou t e 1.5 V to t he V
Each power signal, regardless of package, must meet the specifications stated in Table 4. In
addition, all V
CC
pins must be connected to a voltage island while all VSS pins have to
CORE
connect to a system ground plane. In addition, the motherboard must implement the V
voltage island or large trace. Similarly, all V
2.3.1Phase Lock Loop (PLL) Power
It is highly critical that phase lock loop power delivery to the processor meets Intel’s requirements.
A low pass filter is required for power delivery to pins PLL1 and PLL2. This serves as an isolated,
decoupled power source for the internal PLL.
2.4Processor Decoupling
Due to the large number of transistors and high internal clock speeds, the processor is capable of
generating large average current swings between low and f ull power states. This causes voltages on
power planes to sag below their nominal values if bulk decoupling is not adequate. Care must be
taken in the board design to ensure that the voltage provided to the processor remains within the
specifications listed in Table 5. Failure to do so can result in timing violations or a reduced lifetime
of the component.
, 77 ground pins, eight VREF, one VCC
CORE
CC
input and 1.5 V must be pr ovi ded to t he Vcc
2.5
SS pins must be connected to a system ground plane.
, one
1.5
CC
CMOS
TT pins as a
output.
1.5
2.4.1System Bus AGTL+ Decoupling
The S.E.P. Package and FC-PGA/FC-PGA2 packages contain high frequency decoupling
capacitance on the processor substrate, where the PPGA package does not. Therefore, Celeron
processors in the PGA packages require high frequency decoupling on the system motherboard.
Bulk decoupling must be provided on the motherboard for proper AGTL+ bus operation for all
packages. See AP-585, Pentium
587, Pentium
Pentium
®
II Processor Power Distribution Guidelines (Order Number 243332), and the
®
II Processor Developer's Manual (Order Number 243502) for more information.
Datasheet19
®
II Processor AGTL+ Guidelines (Order Number 243330), AP-
®
Intel
Celeron® Processor up to 1.10 GHz
2.5Voltage Identi fication
The processor’s voltage identification (VID) pins can be used to automatically select the VCC
voltage from a compatible voltage regulator. There are five VID pins (VID[4:0]) on the S.E.P.
Package, while there are only four (VID[3:0]) on the PGA packages. This is because there are no
Celeron processors in the PGA package that require more than 2.05 V (see Table 2).
VID pins are not signals, but rather are an open or short circuit to V
combination of opens and shorts defines the processor core’s required voltage. The VID pins also
allow for compatibility with current and future Intel Celeron processors.
Note that the ‘11 11 1’ (all opens) ID can be used to detect the abs ence of a pr ocessor cor e in a given
slot (S.E.P. Package only), as long as the power supply used does not affect the VID signals.
Detection logic and pull-ups should not affect VID inputs at the power source (see Section 7.0).
External logic monitoring the VID signals or the voltage regulator may require the VID pins to be
pulled-up. If this is the case, the VID pins should be pulled up to a TTL-compatible level with
external resistors to the power source of the regulator.
The power source chosen must be guaranteed to be stable whenever the voltage regulator’s supply
is stable. This will prevent the possibility of the processor supply going above the specified
V
CC
in the event of a failure in the supply for the VID lines. In the case of a DC-to-DC
CORE
converter, this can be accomplished by using the input voltage to the converter for the VID line
pull-ups. In addition, the power supply must supply the requested voltage or disable itself.
T a ble 2. Voltage Identification Definition
VID4
(S.E.P.P. only)
011111.30
011101.35
011011.40
011001.45
010111.50
010101.55
010011.60
010001.65
001111.70
001101.75
001011.80
001001.85
000111.90
000101.95
000012.00
000002.05
11111No Core
11110 2.1
VID3VID2V ID1VID0V
SS on the processor. The
CC
CORE
4
CORE
4
NOTES:
1. 0 = Processor pin connected to V
2. 1 = Open on processor; may be pulled up to TTL V
3. The Celeron proces sor core uses a 2.0 V power source.
4. VID 4 applies only to the S.E.P. Package. VID[3:0] applies to both S.E.P. and PGA packages.
SS.
on motherboard.
IH
20Datasheet
2.6System Bus Unused Pins
®
Intel
Celeron® Processor up to 1.10 GHz
All RESERVED pins must remain unconnected. Connection of these pins to VCC
CORE
, VSS, or to
any other signal (including each other) can result in component malfunction or incompatibility
with future Celeron processor products. See Section 5.0 for a pin listing of the processor and the
location of each RESERVED pin.
For Intel Celeron processors in the S.E.P. Package, the TESTHI pin must be at a logic-high level
when the core power supply comes up. For more information, please refer to erratum C26 of the
®
Intel
Celeron® Processor Specification Update (Order Number 243748). Also note that the
TESTHI signal is not available on Intel Celeron processors in the PGA package.
PICCLK must be driven with a valid clock input and the PICD[1:0] lines must be pulled-up to
2.5 V even when the APIC will not be used. A separate pull-up resistor must be provided for each
PICD line.
For reliable operation, always connect unused inputs or bi-directional signals to their deasserted
signal level. The pull-up or pul l-down res i stor value is system dependent and should be c hosen
such that the logic-high (V
) and logic-low (VIL) requirements are met.
IH
For the S.E.P. Package, unused AGTL+ inputs should not be connected as the package substrate has
termination resistors. On the other hand, the PGA packages do not have AGTL+ termination in
their package and must have any unused AGTL+ inputs terminated through a pull-up resistor. For
designs that intend to only support the FC-PGA/FC-PGA2 processors, unused AGTL+ inputs will
be terminated by the processor’s on-die termination resistors and, thus, do not need to be
terminated on the motherboard. However, the reset pin should always be terminated on the
motherboard.
For unused CMOS inputs, active-low signals should be connected through a pull-up resistor to
meet V
meet V
requirements and active-high signals should be con nected through a pull-down res istor to
IH
requirements. Unused CMOS outputs can be left unconnected. A resistor must be used
IL
when tying bi-directional signals to power or ground. For any signal pulled to either power or
ground, a resistor will allow for system testability.
2.7Processor System Bus Signal Groups
To simplify the following discussion, the Celeron processor system bus signals have been
combined into groups by buffer type. All Celeron processor system bus outputs are open drain
and require a high-level source provided externally by the termination or pull-up resistor.
AGTL+ input signals have dif fe rential input buffers, which use V
output signals require termination to 1.5 V. In this document, the term "AGTL+ Input" refers to the
AGTL+ input group as well as the AGTL+ I/O group when receiving. Similarly, "AGTL+ Output"
refers to the AGTL+ output group as well as the AGTL+ I/O group when driving.
EMI pins (S.E.P. Package only) should be connected to motherboard ground and/or to chassis
ground through zero ohm (0 Ω) resistors. The zero ohm resistors should be placed in close
proximity to the SC242 conn ect or. The path to chassis ground should be short in l eng th and have a
low impedance.
The PWRGOOD, BCLK, and PICCLK inputs can each be driven from ground to 2.5 V. Other
CMOS inputs (A20M#, IGNNE#, INIT#, LINT0/INTR, LINT1/NMI, PREQ#, SMI, SLP#, and
STPCLK#) must be pulled up to V
CC
. In addition, the CMOS, APIC, and TAP outputs are
CMOS
Datasheet21
REF as a reference signal. AGTL+
®
Intel
Celeron® Processor up to 1.10 GHz
open drai n and should be pulled high to VCC
. This ensures not only correct operation for
CMOS
current Intel Celeron processors, but compatibility for future Intel Celeron processor products as
well.
The groups and the signals contained within each group are shown in Table 3. Refer to Section 7.0
for descriptions of these signals.
Table 3. Intel® Celeron® Processor System Bus Signal Groups
1. See Section 7.0 for information on the PWRGOOD signal.
2. See Section 7.0 for inform ation on the SLP# signal.
3. See Section 7.0 for information on the THERMTRI P# signal.
4. These signals are specified for 2.5 V operation for S.E.P.P. and PPGA packages; they are specified at 1.5V
operation for the FC-PGA/FC-PGA2 packages.
CC
5. V
VID[4:0] and VID[3:0] are described in Section 2.0.
V
V
V
SLOTOCC# is described in Section 7.0.
is the power supply for the processor core.
CORE
TT is used to terminate the system bus and generate VREF on the processor substrate.
SS is system ground.
CC
is not connected to the Celeron processor. This supply is used for Voltage Transient Tools.
5
BSEL is described in Section 2.7.2 and Section 7.0.
EMI pins are described in Section 7.0.
CC
is a Pentium® II processor reserved signal provided to maintain compatibility with the Pentium® II
V
L2
processor and may be left as a no-connect for “Intel Celeron processor-only” designs.
6. Only applies to Intel Celeron processors in the S.E.P. Package.
7. Only applies to Intel Celeron processors in the PPGA and FC-PGA/FC-PGA2 packages.
8. The BR0# pin is the only BREQ# signal that is bidirectional. See Section 7.0for more information.
9. These signals are specified for 2.5 V operation.
10.BSEL1 is not used in Celeron processors.
11.RESET# must always be terminated to V
TT on the motherboard for PGA packages. On-die termination is not
provided for this signal on FC-PGA/FC-PGA2 packages.
12.For the FC-PGA/FC-PGA2 packages, this signal is used to control the value of the processor on-die
termination resistance. Refer to the specific platform design guide for the recommended pull-down resistor
value.
13.Only applies to Intel Celeron processors in the FC-PGA/FC-P GA2 packages.
14.S.E.P. Package and FC-PGA/FC-PGA2 packages.
22Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
2.7.1Asynchronous Vs. Synchronous for System Bus Signals
All AGTL+ signals are synchronous to BCLK. All of the CMOS, APIC, and TAP signals can be
applied asynchronously to BCLK. All APIC signals are synchronous to PICCLK. All TAP signals
are synchronous to TCK.
2.7.2System Bus Frequency Select Signal (BSEL[1:0])
The BSEL pins have two functions. First, they can act as outputs and can be used by an external
clock generator to select the proper system bus frequency. Second, they can act as an inputs and
can be used by a system BIOS to detect and report the processor core frequency. See the Intel
Celeron
an example implementation of BSEL.
BSEL0 is 3.3 V tolerant for the S.E.P. Package, while it is 2.5 V tolerant on the PPGA package. A
logic-low on BSEL0 is defined as 66 MHz. On the FC-PGA/FC-PGA2 packages a logic low on
both BSEL0 and BSEL1 are defined as 66 MHz and are 3.3V tolerant.
®
Processor with the Intel® 440ZX-66 AGPset Design Guide (Order Number 245126) for
2.8Test Access Port (TAP ) Connection
®
Due to the voltage levels supported by other components in the Test Access Port (TAP) logic, it is
recommended that the Celeron processor be first in the TAP chain and followed by any other
components within the system. A translation buffer should be used to connect to the rest of the
chain unless one of the other components is capable of accepting a Vcc
Similar considerations must be made for TCK, TMS, and TRST#. Two copies of each signal may
be required with each driving a different voltage level.
A Debug Port may be placed at the start and end of the TAP chain with the TDI of the first
component coming from the Debug P ort and the TD O from th e last compo nent going t o the Deb ug
Port.
2.9Maximum Ratings
Table 4 contains the Celeron processor stress ratings only. Functional operation at the absolute
maximum and minimum is not implied nor guaranteed. The processor should not receive a clock
while subjected to these conditions. Functional operating conditions are given in the AC and DC
tables. Extended exposure to the maximum ratings may affect device reliability. Furthermore,
although the processor contains protect ive circ uit ry to res i st damag e from st at ic electr ic dis charge,
one should always take precautions to avoid high static voltages or electric fields.
(1.5V or 2.5 V) input.
CMOS
Datasheet23
®
Intel
Celeron® Processor up to 1.10 GHz
Table 4. Absolute Maximum Ratings
SymbolParameterMinMaxUnitNotes
T
STORAGE
CC(All)
V
VinAGTL+
VinCMOS
VIDM ax VI D pin current5mA
I
I
SLOTOCC#Max SLOTOCC# pin current5mA5
I
CPUPRES#Max CPUPRES# pin current5mA6
Mech Max
Edge Fingers
Processor storage temperature–4085°C
Any processor supply voltage with
respect to V
• PPGA and S.E.P.P.–0.5
• FC-PGA/FC-PGA2 –0.52.1V
AGTL+ buffer DC input voltage with
respect to V
• PPGA and S.E.P.P.–0.3VCC
•FC-PGA/FC-PGA2 V
CMOS buffer DC input voltage with
respect to V
• PPGA and S.E.P.P.-0.33.3V3
•FC-PGA/FC-PGA2V
Mechanical integrity of processor
5
edge fingers
SS
SS
SS
Operating
voltage + 1.0
+ 0.7V
CORE
TT- 2.182.18V7, 8
TT- 2.18
-0.58
2.18
3.18
50
V1, 2
V
V
Insertions/
Extractions
7, 8, 9
10
4, 5
NOTES:
1. Operating voltage is the voltage to which the component is designed to operate. See Table 5.
2. This rating applies to the V
3. Parameter applies to CMOS, APIC, and TAP bus signal groups only.
4. The electrical and mechanical integrity of the processor edge fingers are specified to last for 50 insertion/
extraction cycles.
5. S.E.P. Package Only
6. PG A Pac kages O nly
7. Input voltage can never exceed V
8. Input voltage can never go below V
9. Parameter applies to CMOS (except BCLK, PICCLK, and PWRGOOD), APIC, and TAP bus signal groups
only for VinCMOS on the FC-PGA/FC-PGA2 Packages only.
10.Parameter applies to CMOS signals BCLK, PICCLK, and PWRGOOD for VinCMOS1.5 on FC-PGA/
FC-PGA2 Package only.
CC
, VCC5, and any input (except as noted below) to the processor.
CORE
SS+ 2.8 volts.
TT- 2.18 volts.
2.10Processor DC Specifi cations
The processor DC specifications in this section are defined for the Celeron processor. See
Section 7.0 for signal definitions and Section 5.0 for signal listings.
Most of the signals on the Intel Celeron processor system bus are in the AGTL+ signal group.
These signals are specified to be terminated to 1.5 V. The DC specifications for these signals are
listed in Table 6.
To allow connection with other devices, the Clock, CMOS, APIC, and TAP signals are designed to
interface at non-AGTL+ levels. The DC specifications for these pins are listed in Table 7.
Table 5 through Table 8 list the DC specifications for Intel Celeron processors operating at 66 MHz
Intel Celeron processor system bus frequencies. Specifications are valid only while meeting
specifications for case temperature, clock frequency, and input voltages. Care should be taken to
read all notes associated with each parameter.
24Datasheet
®
Intel
Ta ble 5. Voltage and Current Specifications (Sheet 1 of 5)
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
CC
CORE
and ICC
2. V
3. These voltages are targets only. A variable voltage source should exist on systems in the event that a
different voltage is required.
4. Use the Typical V oltage specification with the Tolerance specifications to provide correct voltage regulation to
the processor.
TT must be held to 1.5 V ± 9%. It is recommended that V TT be held to 1.5 V ± 3% while the Celeron
5. V
processor system bus is idle. This is measured at the processor edge fingers.
6. These are the tolerance requirements, across a 20 MHz bandwidth, at the SC242 connector pin on the bottom side of the baseboard. The requirements at the SC242 connector pins account for voltage drops
(and impedance discontinuities) across the connector, processor edge fingers, and to the processor core.
CC
V
7. These are the tolerance requirements, across a 20 MHz bandwidth, at the processor edge fingers. The
must return to within the static voltage specification within 100 µs after a transient event.
CORE
requirements at the processor edge fingers account for voltage drops (and impedance discontinuities) at the
processor edge fingers and to the processor core. V
specification within 100 µs after a transient event.
8. These are the tolerance requirements, across a 20 MHz bandwidth, at the top of the PPGA package.
CC
V
9. Max I
tolerance), under maximum signal loading conditions.
must return to within the static voltage specification within 100 µs after a transient event.
CORE
CC
measurements are measured at VCC
CORE
10.Voltage regulators may be designed with a minimum equivalent internal resistance to ensure that the output
voltage, at maximum current output, is no greater than the nominal (i.e., typical) voltage level of V
CC
(V
CORE_TYP
the specified maximum current I
CC
I
CORE_REG
11.The current specified is the current required for a single Intel Celeron processor. A similar amount of current
). In this case, the maximum current level for the regulator, ICC
= ICC
is drawn through the termination resistors on the opposite end of the AGTL+ bus, unless single-ended
termination is used (see Section 2.1).
12.The curr ent specified is also for AutoHALT state.
13.Maxim um values are specif ied by design/charac terization at nominal V
14.Based on simulation and averaged over the duration of any change in current. Use to compute the maximum
inductance tolerable and reaction time of the voltage regulator. This parameter is not tested.
CC/dt specifications are measured and specified at the SC242 connector pins.
15.dI
16.FC-PGA/FC-PGA2 packages only
17.Thes e are the tolerance requirements across a 20 MHz bandwidth at the FC-PGA/FC-PG A2 sock et pins on
the solder side of the motherboard. V
100 µs after a transient event.
18.PG A only
19.S.E.P Package and FC-PGA/FC-PGA2 Packages only
20.These processors implement independent V
21.For processors with CPUID of 0686h, the I
22.For processors with CPUID of 0686h, the I
23.For processors with CPUID of 0686h, the I
24.This specification is applicable only for processor frequencies of 933 MHz and above.
25.This Intel
®
Celeron® processor is a Telecommunications and Embedded Group (TSEG) and Embedded Intel
Architecture Division (EID) product only.
supply the processor core.
CORE
CC
CORE_MAX
CORE_MAX
× VCC
CORE_TYP
CC
must return to within the static voltage
CORE
max voltage (VCC
CORE
CORE_TYP
and is calculated by the equation:
/(VCC
CORE_TYP
CC
must return to within the static voltage specification within
CORE
TT and VCC
SGNT is 2.5 A.
SLP is 2.5 A.
DSLP is 2.2 A.
+ VCC
power planes.
CORE
Tolerance, Transient)
CORE
CC
CORE
+ maximum static
CORE_REG
.
®
CC
, can be reduced from
CORE
30Datasheet
Table 6. AGTL+ Signal Groups DC Specifications
SymbolParameterMinMaxUnitNotes
Input Low Voltage
V
IL
V
IH
R
ON
I
L
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies and cache
sizes.
and VOH for the Intel Celeron processor may experience excursions of up to 200 mV above VTT for a
2. V
IH
single system bus clock. However, input signal drivers must comply with the signal quality specifications in
Section 3.0.
3. Minimum and maxim u m V
4. Parameter correlated to measurement into a 25 Ω resistor terminated to 1.5 V.
for the Intel Celeron processor may experience excursions of up to 12 mA for a single system bus clock.
5. I
OH
6. (0 ≤ V
packages.
7. (0 ≤ V
FC-PGA2 packages.
8. Refer to the I/O Buffer Models for IV characteristics.
9. Steady state input voltage must not be above V
• S.E.P.P and PPGA–0.30.82V
• FC-PGA/FC-PGA2–0.150V
Input High Voltage
• S.E.P.P and PPGA1.22V
•FC-PGA/FC-PGA2V
REF + 0.200VTTV2, 3
Buffer On Resistance 16.67Ω 8
Leakage Current for
inputs, outputs, and I/O
TT are given in Table 8.
IN≤ 2.0 V +5%) for S.E.P Package and PPGA Package; (0 ≤ VIN≤ 1.5V +3%) for FC-PGA/FC-PGA2
OUT≤ 2.0 V +5%) for S.E.P Package and PPGA Package; (0 ≤ VOUT≤ 1.5V +3%) for FC-PGA/
SS
®
Intel
Celeron® Processor up to 1.10 GHz
REF – 0.200V9
TTV2, 3
±100µA6, 7
+ 1.65 V or below VTT - 1.65 V.
Datasheet31
®
Intel
Celeron® Processor up to 1.10 GHz
Table 7. Non-AGTL+ Signal Group DC Specifications
SymbolParameterMinMaxUnitNotes
V
V
V
V
V
V
V
IL
IH
IL1.5
IL2.5
IH1.5
IH2.5
OL
Input Low Voltage–0.30.7V10
Input High Voltage1.72.625V
2.5 V +5% maximum,
Note 10
Input Low Voltage–0.150VREF - 0.200V8, 9
Input Low Voltage-0.580.700V7, 9
Input High VoltageVREF + 0.200VTTV5, 8, 9
Input High Voltage2.03.18V7, 9
Output Low Voltage0.4V2
Output High Voltage
V
OH
• S.E.P.P and PPGAN/A2.625V
•FC-PGA/FC-PGA2V
TTV6, 8, 9
All outputs are open-
drain to 2.5 V +5%
Output Low Current
I
OL
• S.E.P.P and PPGA14mA
• FC-PGA/FC-PGA29mA9
I
L
Leakage Current for
Inputs, Outputs, and I/O
±100µA3, 4, 5, 6
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. Parameter measured at 14 mA (for use with TTL inputs) for S.E.P Package and PPGA Package. It is 9 mA
for FC-PGA/FC-PGA2 packages.
IN≤ 2.5 V +5%) for PPGA package and S.E.P package only.
3. (0 ≤ V
OUT≤ 2.5 V +5%) for PPGA package and S.E.P package only.
4. (0 ≤ V
IN≤ 1.5V +3%) for FC-PGA/FC-PGA2 packages only.
5. (0≤ V
OUT≤ 1.5V +3%) for FC-PGA/FC-PGA2 packages only.
6. (0≤ V
7. Applies to non-AGTL+ signals BCLK, PICCLK, and PWRGOOD for FC-PGA/FC-PGA2 Packages only.
8. Applies to non-AGTL+ signals except BCLK, PICCLK, and PWRGOOD for FC-PGA/FC-PGA2 packages
only.
9. These values are specified at the processor pins for FC-PGA/FC-PGA2 packages only.
10.S.E.P. package and PPGA package only.
32Datasheet
®
Intel
2.11AGTL+ System Bus Specifications
It is recommended that the AGTL+ bus be routed in a daisy-chain fashion with termination
resistors to V
between the ends of the signal traces and the V
approximate the substrate impedance. The valid high and low levels are determined by the input
buffers using a reference voltage called V
lengths are tightly controlled, see the Intel
or the Intel
Number 245088) for more information.
TT at each end of the signal trace. These termination resistors are placed electrically
TT voltage supply and generally are chosen to
REF. Single ended termination may be possible if trace
®
®
Celeron® Processor (PPGA) with the Intel® 440LX AGPs et Design Guide (Order
440EX AGPset Design Guide (Order Number 290637)
Celeron® Processor up to 1.10 GHz
Table 8 below lists the nominal specification for the AGTL+ termination voltage (V
AGTL+ reference voltage (V
the processor core, but should be set to
REF) is generated on the processor substrate (S.E.P. Package only) for
2
/3 VTT for other AGTL+ logic using a voltage divider on
the motherboard. It is important that the motherboard impedance be specified and held to:
• ±20% tolerance (S.E.E.P. and PPGA)
• ±15% tolerance (FC-PGA/FC-PGA2)
It is also important that the intrinsic trace capacitance for the AG TL+ s ignal group traces is known
and well-controlled. For more details on AGTL+, see the PentiumManual (Order Number 243502) and AP-585, Pentium
Number 243330).
T a ble 8. Processor AGTL+ Bus Specifications
SymbolParameterMinTypMaxUnitsNotes
Bus Termination Voltage
V
R
V
TT
TT
REF
• S.E.P.P and PPGA1.3651.501.635V1.5 V ± 9%
•FC-PGA/FC-PGA21.50V4
Termination Resistor
• S.E.P.P and PPGA56Ω± 5%
•FC-PGA/FC-PGA2
(on die R
Bus Reference Voltage
• S.E.P.P and PPGA
• FC-PGA/FC-PGA20.9502/3 VTT1.05V6
TT)
®
®
II Processor AGTL+ Guidelines (Order
40130Ω5
2
/3 VTTV± 2%
II Processor Developer's
TT). The
2
3
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
TT must be held to 1.5 V ± 9%; dICC
2. V
1.5 V ± 3% while the Intel Celeron processor system bus is idle. This is measured at the processor edge
fingers.
REF is generated on the processor substrate to be
3. V
created on the motherboard for processors in the PPGA package.
TT and Vcc
4. V
processor system bus is idle (static condition). This is measured at the PGA370 socket pins on the bottom
side of the baseboard.
5. The value of the on-die R
on-die R
details on the RTTCTRL signal. Refer to the recommendation guidelines for the specific chipset/processor
combination.
REF is generated on the motherboard and should be 2/3 VTT ±2% nominally. Insure that there is adequate
6. V
REF decoupling on the motherboard.
V
must be held to 1.5V ±9%. It is required that VTT and Vcc
1.5
is determined by the resistor value measured by the RTTCTRL signal pin. The
tolerance is ±15% based on the RTTCTRL resistor pull-down of ±1%. See Section 7.0 for more
TT
TT
/dt is specified in Table 5. It is recommended that VTT be held to
VTT
2
/3 VTT nominally with the S.E.P. package. It must be
be held to 1.5 V ±3% while the
1.5
Datasheet33
®
Intel
Celeron® Processor up to 1.10 GHz
2.12System Bus AC Specifications
The Celeron processor system bus timings specified in this section are defined at the Intel Celeron
processor edge fingers and the processor core pins. T imings specified at the processor edge fingers
only apply to the S.E.P. Package and timings given at the processor core pins apply to all S.E.P.
Package and PGA packages. Unless otherwise specified, timings are tested at the processor core
during manufacturing. Timings at the processor edge fingers are specified by design
characterization. See Section 7.0 for the Intel Celeron processor signal definitions. Note that at
66 MHz system bus operation, the Intel Celeron processor timings at the processor edge
fingers are identical to the Pentium II processor timings at the edge fingers. See the Pentium
II Processor at 233, 266, 300, and 333 MHz (Order Number 243335) for more detail.
Table 9 through Table 26 list the AC specifications associated with the Intel Celeron processor
system bus. These specifications are broken into the f ollowing categories: Table 9 through Table 12
contain the system bus clock specifications, Table 13 and Table 14 contain the AGTL+
specifications, Table 17 and Table 18 are the CMOS signal group specifications, Table 20 contains
timings for the Reset conditions, Table 22 and Table 23 cover APIC bus timing, an d Table 25 and
Table 26 cover TAP timing. For each pair of tables, the first table contains timing specif ications for
measurement or simulation at the processor edge fingers. The second table contains specifications
for simulation at the processor core pads.
All Intel Celeron processor system bus AC specifications for the AGTL+ signal group are relative
to the rising edge of the BCLK input. All AGTL+ timings are referenced to V
‘1’ logic levels unless otherwise specified.
REF for both ‘0’ and
®
The timings specified in this section should be used in conjunction with the I/O buffer models
provided by Intel. These I/O buffer models, which include package information, are available in
Quad format as the Intel Celeron
Form). AGTL+ layout guidelines are also available in AP-585, Pentium
®
Processor I/O Buffer Models, Quad XTK Format (Electronic
®
II Processor AGTL+
Guidelines (Order Number 243330).
Care should be taken to read all notes associated with a particular timing parameter.
34Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
T a ble 9. System Bus AC Specifications (Clock) at the Processor Edge Fingers
(for S.E.P. Package)
T# ParameterMinNomMaxUnitFigureNotes
System Bus Frequency66.67MHz
T1’: BCLK Period15.0ns34, 5, 6
T1B’: SC242 to Core Logic BCLK Offset0.78ns3Absolute Value
T2’: BCLK Period Stability± 300psSee Table 10
T3’: BCLK High Time4.44ns3@>2.0 V
T4’: BCLK Low Time4.44ns3@<0.5 V
T5’: BCLK Rise Time0.842.31ns3(0.5 V–2.0 V)
T6’: BCLK Fall Time0.842.31ns3(2.0 V–0. 5 V)
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. All AC timings for the AGTL+ signals are referenced to the BCLK rising edge at 0.70 V at the processor edge
fingers. This reference is to account for trace length and capacitance on the processor substrate, allowing the
processor core to receive the signal with a reference at 1.25 V. All AGTL+ signal timings (address bus, data
bus, etc.) are referenced at 1.00 V at the processor edge fingers.
3. All AC timings for the CMOS signals are referenced to the BCLK rising edge at 0.70 V at the processor edge
fingers. This reference is to account for trace length and capacitance on the processor substrate, allowing the
processor core to receive the signal with a reference at 1.25 V. All CMOS signal timings (compatibility
signals, etc.) are referenced at 1.25 V at the processor edge fingers.
4. The internal core clock frequency is derived from the Intel Celeron processor system bus clock. The sys tem
bus clock to core clock ratio is determined during initialization. Table 12 shows the supported ratios for each
processor.
5. The BCLK period allows a +0.5 ns tolerance for clock driver variation.
6. This specification applies to Intel Celeron processors when operating at a system bus frequency of 66 MHz.
7. The BCLK offset time is the absolute difference needed between the BCLK signal arriving at the Intel Celeron
processor edge finger at 0.5 V vs. arriving at the core logic at 1.25 V. The positive offset is needed to account
for the delay between the SC242 connector and processor core. The positive offset ensures both the
processor core and the core logic receive the BCLK edge concurrently.
8. See Sect ion 3.1 for Intel Celeron processor system bus clock signal quality specifications.
9. Not 100% tested. Specified by design characterization as a clock driver requirement.
7,8
6
6
6, 9
6, 9
Datasheet35
®
Intel
Celeron® Processor up to 1.10 GHz
T a ble 10. System Bus AC Specifications (Clock) at the Processor
Core Pins (for Both S.E.P. and PGA Packages)
T# ParameterMi nNomMaxUnitFigureNotes
System Bus Frequency66.67MHz
T1: BCLK Period15.0ns34, 5, 6
T2: BCLK Period Stability± 300ps36, 8, 9
T3: BCLK High Time4.94ns3@>2.0 V
T4: BCLK Low Time4.94ns3@<0.5 V
T5: BCLK Rise Time
• S.E.P.P. and PPGA
•FC-PGA/FC-PGA2
T6: BCLK Fall T i me
• S.E.P.P. and PPGA
•FC-PGA/FC-PGA2
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. All AC timings for the AGTL+ signals are referenced to the BCLK rising edge at 1.25 V at the processor core
pin. All AGTL+ signal timings (address bus, data bus, etc.) are referenced at 1.00 V at the processor core
pins.
3. All AC timings for the CMOS signals are referenced to the BCLK rising edge at 1.25 V at the processor core
pin. All CMOS signal timings (compatibility signals, etc.) are referenced at 1.25 V at the processor core pins.
4. The internal core clock frequency is derived from the Intel Celeron processor system bus clock . The system
bus clock to core clock ratio is determined during initialization. Table 12 shows the supported ratios for each
processor.
5. The BCLK period allows a +0.5 ns tolerance for clock driver variation.
6. This specification applies to the Intel Celeron processor when operating at a system bus frequency of
66 MHz.
7. See Section 3.1 for Intel Celeron processor system bus clock signal quality specifications.
8. Due to the difficulty of accurately measuring clock jitter in a system, it is recommended that a clock driver be
used that is designed to meet the period stability specification into a test load of 10 to 20 pF. This should be
measured on the rising edges of adjacent BCLKs crossing 1.25 V at the processor core pin. The jitter
present must be accounted for as a component of BCLK timing skew between devices.
9. The clock driver’s closed loop jitter bandwidth must be set low to allow any PLL-based device to track the
jitter created by the clock driver. The –20 dB attenuation point, as measured into a 10 to 20 pF load, should
be less than 500 kHz. This specification may be ensured by design characterization and/or measured with a
spectrum analyzer.
10.No t 100% tested. Specified by design characterization as a clock driver requirement.
11.BCLK Rise time is measure between 0.5V–2.0V. BCLK fall time is measured between 2.0 V–0.5 V.
0.34
0.40
0.34
0.40
1.36
1.6
1.36
1.6
ns
ns
ns
ns
6
6
33(0.5 V–2.0 V)
10, 11
33(2.0 V–0.5 V)
10, 11
6, 10
6, 10
36Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
T able 11. System Bus AC Specifications (SET Clock)
1. Unless otherwise noted, all specifications in this table apply to Celeron
2. All AC timings for the AGTL+ signals are referenced to the BCLK rising edge at 1.25 V at the processor pin.
All AGTL+ signal timings (address bus, data bus, etc.) are referenced at 1.00 V at the processor pins.
3. Not 100% tested. Specified by design characterization as a clock driver requirement.
4. The internal core clock frequency is derived from the processor system bus clock. The system bus clock to
core clock ratio is determined during initialization. Individual processors will only operate at their specified
system bus frequency, either 66 MHz or 100 MHz, not both. Table 12 shows the supported ratios for each
processor.
5. The BCLK period allows a +0.5 ns tolerance for clock driver variation. See the appropriate clock synthesizer/
driver specification for details.
6. Due to the difficulty of accurately measuring clock jitter in a system, it is recommended that a clock driver be
used that is designed to meet the period stability specification into a test load of 10 to 20 pF. This should be
measured on the rising edges of adjacent BCLKs crossing 1.25 V at the processor pin. The jitter present
must be accounted for as a component of BCLK timing skew between devices.
7. The clock driver’s closed loop jitter bandwidth must be set low to allow any PLL-based device to track the
jitter created by the clock driver. The –20 dB attenuation point, as measured into a 10 to 20 pF load, should
be less than 500 kHz. This specification may be ensured by design characterization and/or measured with a
spectrum analyzer. See the appropriate clock synthesizer/driver specification for details
8. BCLK Rise time is measure between 0.5 V–2.0 V. BCLK fall time is measured between 2.0 V–0.5 V.
9. BCLK high time is measured as the period of time above 2.0 V. BCLK low time is measured as the period of
time below 0.5 V.
10.This specification applies to Pentium III
11.This specification applies to Pentium III
processors operating at a system bus frequency of 66 MHz.processors operating at a system bus frequency of 100 MHz
66.67
100.00
10.0
10.0
2.5
2.5
2.4
2.4
1, 2
±250
±250
MHz4
ns3
ps
ns3
ns3
4, 5, 10
4, 5, 11
6, 7, 10
6, 7, 11
9, 10
9, 11
9, 10
9, 11
processors at all frequencies.
Datasheet37
®
Intel
Celeron® Processor up to 1.10 GHz
Table 12. Valid Intel® Celeron® Processor System Bus, Core Frequency
Core Frequency (MHz)BCLK Frequency (MHz)Frequency Multiplier
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. Not 100% tested. Specified by design characterization.
3. All AC timings for the AGTL+ signals are referenced to the BCLK rising edge at 0.50 V at the processor edge
fingers. All AGTL+ signal timings (compatibility signals, etc.) are referenced at 1.00 V at the processor edge
fingers.
4. This specification applies to Intel Celeron processors operating with a 66 MHz Intel Celeron processor
system bus only.
5. Valid delay timings for these signals are specified into 50 Ω to 1.5 V and with V
6. A minimum of 3 clocks must be guaranteed between two active-to-inactive transitions of TRDY#.
7. RESET# can be asserted (active) asynchronously, but must be deasserted synchronously.
8. Specification is for a minimum 0.40 V swing.
9. Specification is for a maximum 1.0 V swing.
10.After V
CC
, and BCLK become stable.
CORE
REF at 1.0 V.
T a ble 14. System Bus AC Specifications (AGTL+ Signal Group) at the Processor Core Pins
1. Unless otherwise noted, all specifications in this table apply to all Intel
2. These specifications are tested during manufacturing.
3. All AC timings for the AGTL+ signals are referenced to the BCLK rising edge at 1.25 V at the processor core
pin. All AGTL+ signal timings (compatibility signals, etc.) are referenced at 1.00 V at the processor core pins.
4. This specification applies to the Intel Celeron processor operating with a 66 MHz Intel Celeron processor
system bus only.
5. Valid delay timings for these signals are specified into 25 Ω to 1.5 V and with V
6. A minimum of 3 clocks must be guaranteed between two active-to-inactive transitions of TRDY#.
7. RESET# can be asserted (active) asynchronously, but must be deasserted synchronously.
8. Specification is for a minimum 0.40 V swing.
9. Specification is for a maximum 1.0 V swing.
10.After V
CC
and BCLK become stable.
CORE
®
Celeron® processor frequencies.
REF at 1.0 V.
Datasheet39
®
Intel
Celeron® Processor up to 1.10 GHz
T a ble 15. Processor System Bus AC Specifications (AGTL+ Signal Group) at the Processor
1. Unless otherwise noted, all specifications in this table apply to all Celeron processors at all frequencies and
cache sizes.
2. These specifications are tested during manufacturing.
3. All AC timings for the AGTL+ signals are referenced to the BCLK rising edge at 1.25 V at the processor pin.
All AGTL+ signal timings (compatibility signals, etc.) are referenced at 1.00V at the processor pins.
4. Valid delay timings for these signals are specified into 50 Ω to 1.5 V and with V
REF at 1.0 V.
5. A minimum of 3 clocks must be guaranteed between two active-to-inactive transitions of TRDY#.
6. R ESE T # can be asserted (active) asynchronously, but must be deasserted synchronously.
7. Specif ication is for a minimum 0.40 V swing from V
REF - 200 mV to VREF + 200 mV. This assumes an edge
rate of 0.3 V/ns.
8. Specification is for a maximum 1.0 V swing from V
CC
9. This should be measure d after V
10.This spec ification applies to the FC-PGA/FC-PGA2 packages runn ing at 66 MHz system bus frequency.
CORE
, VCC
TT – 1V to VTT. This assumes an edge rate of 3 V/ns.
, and BCLK become stable.
CMOS
11.This specification applies to the FC-PGA/FC-PGA2 packages running at 100 MHz system bus frequency.
40Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
T able 17. System Bus AC Specifications (CMOS Signal Group) at the P rocessor Edge Fingers
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. Not 100% tested. Specified by design characterization.
3. All AC timings for the CMOS signals are referenced to the BCLK rising edge at 0.50 V at the processor edge
fingers. All CMOS signal timings (address bus, data bus, etc.) are referenced at 1.25 V.
4. These signals may be driven asynchronously.
5. This specification only applies when the APIC is enabled and the LINT1 or LINT0 pin is configured as an
edge-triggered interrupt with fixed delivery; otherwise, specification T14 applies.
PWRGOOD must remain below V
specifications in Table 5 and BCLK has met the BCLK AC specifications in T able 10 for at least 10 clock
cycles. PWRGOOD must rise glitch-free and monotonically to 2.5 V.
6. When driven inactive or after V
7. If the BCLK signal meets its AC specification within 150 ns of turning on, then the PWRGOOD inactive pulse
width specification (T15) is waived and BCLK may start after PWRGOOD is asserted. PWRGOOD must still
remain below V
until all the voltage planes meet the voltage tolerance specifications.
IL,max
IL,max
CC
, and BCLK become stable.
CORE
2BCLKs8
(Table 6) until all the voltage planes meet the voltage tolerance
Active and
Inactive states
Table 18. System Bus AC Specifications (CMOS Signal Group) at the Processor Core Pins
(for Both S.E.P., PGA, and FC-PGA/FC-PGA2 Packages)
T# ParameterMinMaxUnitFigureNotes
T14: CMOS Input Pulse Width, except
PWRGOOD
T14B: LINT[1:0] Input Pulse Width
(S.E.P.P. Only)
T15: PWRGOOD Inactive Pulse Width10BCLKs86, 7
2BCLKs8
6BCLKs85
Active and
Inactive states
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. These specifications are tested during manufacturing.
3. All AC timings for the CMOS signals are referenced to the BCLK rising edge at 1.25 V at the processor core
pins. All CMOS signal timings (address bus, data bus, etc.) are referenced at 1.25 V.
4. These signals may be driven asynchronously.
5. This specification only applies when the APIC is enabled and the LINT1 or LINT0 pin is configured as an
edge-triggered interrupt with fixed delivery; otherwise, specification T14 applies.
6. When driven inactive or after V
7. If the BCLK signal meets its AC specification within 150 ns of turning on, then the PWRGOOD inactive pulse
width specification (T15) is waived and BCLK may start after PWRGOOD is asserted. PWRGOOD must still
remain below V
PWRGOOD must remain below V
specifications in Table 5 and BCLK has met the BCLK AC specifications in T able 10 for at least 10 clock
cycles. PWRGOOD must rise glitch-free and monotonically to 2.5 V.
until all the voltage planes meet the voltage tolerance specifications.
IL,max
CC
, and BCLK become stable.
CORE
(Table 6) until all the voltage planes meet the voltage tolerance
IL,max
Datasheet41
®
Intel
Celeron® Processor up to 1.10 GHz
Table 19. System Bus AC Specifications (CMOS Signal Group)
T# ParameterMinMaxUnitFigureNotes
T14: CMOS Input Pulse Width, except
PWRGOOD
T15: PWRGOOD Inactive Pulse Width10BCLKs4, 85
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Celeron processors at all frequencies
2. These specifications are tested during manufacturing.
3. These signals may be driven asynchronously.
4. All CMOS outputs shall be asserted for at least 2 BCLKs.
5. When driven inactive or after V
CC
CORE
2BCLKs4
, VTT, VCC
, and BCLK become stable.
CMOS
1, 2, 3, 4
Active and
Inactive states
Table 20. System Bus AC Specifications (Reset Conditions)
(for Both S.E.P. and PPGA Packages)
T# ParameterMinMaxUnitFigureNotes
T16: Reset Configuration Signals (A[14:5]#,
BR0#, FLUSH#, INIT#) Setup Time
T17: Reset Configuration Signals (A[14:5]#,
BR0#, FLUSH#, INIT#) Hold Time
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Intel ®Celeron
4BCLKs6
220BCLKs6
Before deassertion
of RESET#
After clock that
deasserts RESET#
®
processor frequencies.
Table 21. System Bus AC Specifications (Reset Conditions) (for the FC-PGA/FC-PGA2
Packages)
T# ParameterMinMaxUnitFigur eNotes
T16: Reset Configuration Signals
(A[14:5]#, BR0#, INIT#)
Setup Time
T17: Reset Configuration Signals
(A[14:5]#, BR0#, INIT#) Hold
Time
T18: Reset Configuration Signals
(A20M#, IGNNE#, LINT[1:0])
Setup Time
T19: Reset Configuration Signals
(A20M#, IGNNE#, LINT[1:0])
Delay Time
T20: Reset Configuration Signals
(A20M#, IGNNE#, LINT[1:0])
Hold Time
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Celeron FC-PGA/FC-PGA2 processors at all
frequencies and cache sizes.
2. For a reset, the clock ratio defined by these signals must be a safe value (their final or a lower-multiplier)
within this delay unless PWRGOOD is being driven inactive.
3. These parameters apply to processor engineering samples only. For production units, the processor core
frequency will be determined through the processor internal logic.
4BCLKs7
220BCLKs7
1ms7
5BCLKs7
220BCLKs7
Before deassertion of
RESET#
After clock that
deasserts RESET#
Before deassertion of
RESET#, 3
After assertion of
RESET#, 2, 3
After clock that
deasserts RESET#, 3
42Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
44
T a ble 22. System Bus AC Specifications (APIC Clock and APIC I/O) at the Processor Edge
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. Not 100% tested. Specified by design characterization.
3. All AC timings for the APIC I/O signals are referenced to the PICCLK rising edge at 0.7 V at the processor
edge fingers. All APIC I/O signal timings are referenced at 1.25 V at the processor edge fingers.
4. This specification applies to Intel Celeron processors operating with a 66 MHz Intel Celeron processor
system bus only.
5. Referenced to PICCLK rising edge.
6. For open drain signals, valid delay is synonymous with float delay.
7. Valid delay timings for these signals are specified to 2.5 V +5%.
Datasheet43
®
Intel
Celeron® Processor up to 1.10 GHz
Table 23. System Bus AC Specifications (APIC Clock and APIC I/O) at the Processor Core
Pins (For S.E.P. and PGA Packages)
T# ParameterMinMaxUnitFigur eNotes
T21: PICCLK Frequency2.033.3MHz
T22: PICCLK Period30.0500.0ns3
T23: PICCLK High Time
• S.E.P.P and PPGA
•FC-PGA/FC-PGA2
T24: PICCLK Low Time
• S.E.P.P and PPGA
•FC-PGA/FC-PGA2
T25: PICCLK Rise Time0.253.0ns3(0.5 V–2.0 V)
T26: PICCLK Fall Time0.253.0ns3(2.0 V–0.5 V)
T27: PICD[1:0] Setup Time
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. These specifications are tested during manufacturing.
3. All AC timings for the APIC I/O signals are referenced to the PICCLK rising edge at 1.25 V at the processor
core pins. All APIC I/O signal timings are referenced at 1.25 V at the processor core pins.
4. This spec ification applies to Intel Celeron processors operating with a 66 MHz Intel Celeron processor
system bus only.
5. R eferenced to PICCLK rising edge.
6. For open drain signals, valid delay is synonymous with float delay.
7. Valid delay timings for these signals are specified to 2.5 V +5%.
8. Valid delay timings for these signals are specified to 1.5 V +5%.
44Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
Table 24. System Bus AC Specifications (APIC Clock and APIC I/O)
1. Unless otherwise noted, all specifications in this table apply to Celeron processors at all frequencies.
2. These specifications are tested during manufacturing.
3. All AC timings for the APIC I/O signals are referenced to the PICCLK rising edge at 1.25 V at the processor
pins. All APIC I/O signal timings are referenced at 0.75 V at the processor pins.
4. Referenced to PICCLK rising edge.
5. For open drain signals, valid delay is synonymous with float delay.
6. Valid delay timings for these signals are specified into 150 Ω load pulled up to 1.5 V.
1, 2, 3
T a ble 25. System Bus AC Specifications (TAP Connection) at the Processor Edge Fingers
(For S.E.P. Package)
T# ParameterMinMaxUnitFigureNotes
T30’: TCK Frequency16.667MHz
T31’: TCK Period60.0ns3
T32’: TCK High Time25.0ns3@1.7 V
T33’: TCK Low Time25.0ns3@0.7 V
T34’: TCK Rise Time5.0ns3(0.7 V–1.7 V)
T35’: TCK Fall Time5.0ns3(1.7 V–0.7 V)
T36’: TRST# Pulse Width40.0ns6Asynchronous
T37’: TDI, TMS Setup Time5.5ns95
T38’: TDI, TMS Hold Time14.5ns95
T39’: TDO Valid Delay2.013.5ns96, 7
T40’: TDO Float Delay28.5ns96, 7
T41’: All Non-Tes t Outputs Valid Delay2.027.5ns96, 8, 9
T42’: All Non-Te s t Inputs Setup Time27.5ns96, 8, 9
T43’: All Non-Te s t Inputs Setup Time5.5ns95, 8, 9
T44’: All Non-Tes t Inputs Hold Time14.5ns95, 8, 9
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Intel ®Celeron® processor frequencies.
2. All AC timings for the TAP signals are referenced to the TCK rising edge at 0.70 V at the processor edge
fingers. All TAP signal timings (TMS, TDI, etc.) are referenced at 1.25 V at the processor edge fingers.
3. Not 100% tested. Specified by design characterization.
4. 1 ns can be added to the maximum TCK rise and fall times for every 1 MHz below 16.667 MHz.
5. Referenced to TCK rising edge.
6. Referenced to TCK falling edge.
7. Valid delay timing for this signal is specified to 2.5 V +5%.
8. Non-Test Outputs and Inputs are the normal output or input signals (besides TCK, TRST#, TDI, TDO, and
TMS). These timings correspond to the response of these signals due to TAP operations.
9. During Debug Port operation, use the normal specified timings rather than the TAP signal timings.
4
4
Datasheet45
®
Intel
Celeron® Processor up to 1.10 GHz
Table 26. System Bus AC Specifications (TAP Connection) at the Processor Core Pins
(for Both S.E.P. and PPGA Packages)
T# ParameterMinMaxUnitFigureNotes
T30: TCK Frequency16.667MHz
T31: TCK Period60.0ns3
T32: TCK High Time25.0ns3@1.7 V; 10
T33: TCK Low Time25.0ns3@0.7 V; 10
T34: TCK Rise Time5.0ns3(0.7 V–1.7 V);
T35: TCK Fall Time5.0ns3(1.7 V–0.7 V)
T36: TRST# Pulse Width40.0ns6Asynchronous; 10
T37: TDI, TMS Setup Time5.0ns95
T38: TDI, TMS Hold Time14.0ns95
T39: TDO Valid Delay1.010.0ns96, 7
T40: TDO Float Delay25.0ns96, 7, 10
T41: All Non-Test Outputs Valid Delay2.025.0ns96, 8, 9
T42: All Non-Test Inputs Setup Time25.0ns96, 8, 9, 10
T43: All Non-T est Inputs Setup Time5.0ns95, 8, 9
T44: All Non-T est Inputs Hold Time13.0ns95, 8, 9
4, 10
;
4, 10
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. For the S.E.P. and PPGA packages: All AC timings for the TAP signals are referenced to the TCK rising edge
at 1.25 V at the processor core pins. All TAP signal timings (TMS, TDI, etc.) are referenced at 1.25 V at the
processor core pins.
For the FC-PGA/FC-PGA2 packages: All AC timings for the TAP signals are referenced to the TCK rising
edge at 0.75 V at the processor pins. All TAP signal timings (TMS, TDI, etc.) are referenced at 0.75 V at the
processor pins.
3. These specifications are tested during manufacturing, unless otherwise noted.
4. 1 ns can be added to the maximum TCK rise and fall times for every 1 MHz below 16.667 MHz.
5. Referenced to TCK rising edge.
6. Referenced to TCK falling edge.
7. For the S.E.P. and PPGA packages: Valid delay timing for this signal is specified to 2.5 V +5%.
For the FC-PGA/FC-PGA2 packages: Valid delay timing for this signal is specified to 1.5 V +3%.
8. Non-Test Outputs and Inputs are the normal output or input signals (besides TCK, TRST#, TDI, TDO, and
TMS). These timings correspond to the response of these signals due to TAP operations.
9. D uring Debug Port operation, use the normal specified timings rather than the TAP signal timings.
10.No t 100% tested. Specified by design characterization.
46Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
Table 27. System Bus AC Specifications (TAP Connection)
T36: TRST# Pulse Width40.0ns10Asynchronous, 1 0
T37: TDI, TMS Setup Time5.0ns95
T38: TDI, TMS Hold Time14.0ns95
T39: TDO Valid Delay1.010.0ns96, 7
T40: TDO Float Delay25.0ns96, 7, 10
T41: All Non-Test Outputs Valid Delay2.025.0ns96, 8, 9
T42: All Non-Test Inputs Setup Time25.0ns96, 8, 9, 10
T43: All Non-Test Inputs Setup Time5.0ns95, 8, 9
T44: All Non-Test Inputs Hold Time13.0ns95, 8, 9
1, 2, 3
+ 0.200 V, 10
REF
– 0.200 V, 10
REF
– 0.200 V) –
(V
REF
+ 0.200 V),
(V
REF
4, 10
(V
+ 0.200 V) –
REF
– 0.200 V),
(V
REF
4, 10
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processors frequencies.
2. All AC timings for the TAP signals are referenced to the TCK rising edge at 0.75 V at the processor pins. All
TAP signal timings (TMS, TDI, etc.) are referenced at 0.75 V at the processor pins.
3. These specifications are tested during manufacturing, unless otherwise noted.
4. 1 ns can be added to the maximum TCK rise and fall times for every 1 MHz below 16.667 MHz.
5. Referenced to TCK rising edge.
6. Referenced to TCK falling edge.
7. Valid delay timing for this signal is specified to 1.5 V (1.25 V for AGTL platforms).
8. Non-Test Outputs and Inputs are the normal output or input signals (besides TCK, TRST#, TDI, TDO, and
TMS). These timings correspond to the response of these signals due to TAP operations.
9. During Debug Port operation, use the normal specified timings rather than the TAP signal timings.
10.Not 100% tested. Specified by design characterization.
Datasheet47
®
Intel
Celeron® Processor up to 1.10 GHz
Note:For Figure 3 through Figure 10, the following apply:
1. Figure 3 through Figure 10 are to be used in conjunction with Table 9 through Table 26.
2. All AC timings for the AGTL+ signals at the processor edge fingers are referenced to the
BCLK rising edge at 0.50 V. This reference is to account for trace length and capacitance on
the processor substrate, allowing the processor core to receive the signal with a reference at
1.25 V. All AGTL+ signal timings (address bus, data bus, etc.) are referenced at 1.00 V at the
processor edge fingers.
3. All AC timings for the AGTL+ signals at the processor core pins are referenced to the BCLK
rising edge at 1.25 V. All AGTL+ signal timings (address bus, data bus, etc.) are referenced at
1.00 V at the processor core pins.
4. All AC timings for the CMOS signals at the processor edge fingers are referenced to the
BCLK rising edge at 0.50 V. This reference is to account for trace length and capacitance on
the processor substrate, allowing the processor core to receive the signal with a reference at
1.25 V. All CMOS signal timings (compatibility signals, etc.) are referenced at 1.25 V at the
processor edge fingers.
5. All AC timings for the APIC I/O signals at the processor edge fingers are referenced to the
PICCLK rising edge at: 0.7 V for S.E.P. and PPGA packages and 0.75 V for the FC-PGA/
FC-PGA2 packages. All APIC I/O signal timings are referenced at 1.25 V for S.E.P. and
PPGA packages and 0.75 V for the FC-PGA/FC-PGA2 packages at the processor edge
fingers.
6. All AC timings for the TAP signals at the processor edge fingers are referenced to the TCK
rising edge at 0.70 V for S.E.P. and PPGA packages and 0.75 V for the FC-PGA/FC-PGA2
packages. All TAP signal timings (TMS, TDI, etc.) are referenced at 1.25 V for S.E.P. and
PPGA packages and 0.75 V for the FC-PGA/FC-PGA2 packages at the processor edge
fingers.
Figure 2. BCLK to Core Logic Offset
BCLK at
Edge Fingers
BCLK at
Core Logic
0.5V
T1B'
1.25V
48Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
Figure 3. BCLK*, PICCLK, and TCK Generic Clock Waveform
t
t
r
CLK
= T5, T25, T34 (Rise Time)
T
r
T
= T6, T26, T35 (Fall Time)
f
= T3, T23, T32 (High Time)
T
h
T
= T4, T24, T33 (Low Time)
l
T
= T1, T22, T31 (BLCK, TCK, PICCLK Period)
p
Note: BCLK is referenced to 0.5 V and 2.0 V. PICCLK is referenced to 0.7 V and 1.7 V.
For S.E.P. and PPGA packages, TCK is referenced to 0.7 V and 1.7 V.
For the FC-PGA package, TCK is referenced to V
V = 1.0V for AGTL+ signal group;
For S.E.P and PPGA packages, 1.25V for CMOS, APIC and JTAG signal groups
For FC-PGA package, 0.75V for CMOS, APIC and TAP signal groups
Figure 5. System Bus Setup and Hold Timings
CLK
Ts
Signal
Ts = T8, T12, T27 (Setup Time)
Th = T9, T13, T28 (Hold Time)
V = 1.0V for AGTL+ signal group;
For S.E.P. and PPGA packages, 1.25V for APIC and JTAG signal groups
For the FC-PGA package, 0.75V for APIC and TAP signal groups
V
Tx
ValidValid
Tpw
Th
Valid
Datasheet49
®
Intel
Celeron® Processor up to 1.10 GHz
Figure 6. System Bus Reset and Configuration Timings (For the S.E.P. and PPGA Packages)
Signals driven on the Celeron processor system bus should meet signal quality specifications to
ensure that the components read data proper ly and to ensur e that incomi ng signal s do not af fect the
long term reliability of the component. Specifications are provided for simulation at the processor
core; guidelines are provided for correlation to the processor edge fingers. These edge finger
guidelines are intended for use during testing and measurement of system signal integrity.
Violations of these guidelines are permitted, but if they occur, simulation of signal quality at the
processor core should be performed to ensure that no violations of signal quality specifications
occur. Meeting the specifications at the processor core in Table 28, Table 31, and Table 34 ensures
that signal quality effects will not adversely affect processor operation, but does not necessarily
guarantee that the guidelines in Table 30, Table 33, and Table 35 will be met.
3.1System Bus Clock (BCLK) Signal Quality Specifications
and Measurement Guidelines
Table 28 describes the BCLK signal quality specifications at the processor core for both S.E.P. and
PPGA Packages. Table 29 shows the BCLK and PICCLK signal quality specifications at the
processor core for the FC-PGA/FC-PGA2 packages. Table 30 describes guidelines for signal
quality measurement at the processor edge fingers. Figure 11 describes the signal quality waveform
for the system bus clock at the processor core pins; Figure 12 describes the signal quality
waveform for the system bus clock at the processor edge fingers.
T able 28. BCLK Signal Quality Specifications for Simulation at the Processor Core
(for Both S.E.P. and PPGA Packages)
T# ParameterMinNomMaxU nitFigureNotes
V1: BCLK VIL0.5V11
V2: BCLK V
V3: V
V4: Rising Edge Ringback1.7V113
V5: Falling Edge Ringback0.7V113
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. This is the Intel Celeron processor system bus clock overs hoot and undershoot specification for 66 MHz
system bus operation.
3. The rising and falling edge ringback voltage specified is the minimum (rising) or maximum (falling) absolute
voltage the BCLK signal can dip back to after passing the V
specification is an absolute value.
IH2.0V112
IN Absolute Voltage Range–0.73.5V112
IH (rising) or VIL (falling) voltage limits. This
52Datasheet
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Intel
Celeron® Processor up to 1.10 GHz
T a ble 29. BCLK/PICCLK Signal Quality Specifications for Simulation at the Processor Pins
(for the FC-PGA/FC-PGA2 Packages)
T# ParameterMinNomMaxUnitFigureNotes
V1: BCLK VIL0.50V11
V1: PICCLK V
V2: BCLK V
V2: PICCLK V
V3: V
1. Unless otherwise noted, all specifications in this table apply to FC-PGA/FC-PGA2 processors frequencies
and cache sizes.
2. The rising and falling edge ringback voltage specified is the minimum (rising) or maximum (falling) absolute
voltage the BCLK/PICCLK signal can dip back to after passing the V
This specification is an absolute value.
IL0.70V11
IH2.00V11
IH2.00V11
IH (rising) or VIL (falling) voltage limits.
Figure 11. BCLK, TCK, PICCLK Generic Clock Waveform at the Processor Core Pins
V2
V1
T3
V5
T6T4T5
V3
V3
V4
Datasheet53
®
V
V
Intel
Celeron® Processor up to 1.10 GHz
Table 30. BCLK Signal Quality Guidelines for Edge Finger Measurement
(for the S.E.P. Package)
T# ParameterMinNomMaxUnitFigureNotes
V1’: BCLK V
V2’: BCLK V
V3’: V
IL
IH
IN Absolute Voltage Range–0.53.3V122
2.0V12
0.5V12
V4’: Rising Edge Ringback2.0V123
V5’: Falling Edge Ringback0.5V123
V6’: T
line Ledge Voltage1.01.7V12At Ledge Midpoint
V7’: Tline Ledge Oscillation0.2V12Peak-to-Peak
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. This is the Intel Celeron processor system bus clock overs hoot and undershoot measur ement guideline.
3. The rising and falling edge ringback voltage guideline is the minimum (rising) or maximum (falling) absolute
voltage the BCLK signal may dip back to after passing the V
guideline is an absolute value.
(rising) or VIL (falling) voltage limits. This
IH
4. The BCLK at the processor edge fingers may have a dip or ledge midway on the rising or falling edge. The
midpoint voltage level of this ledge should be within the range of the guideline.
5. The ledge (V7) is allowed to have peak-to-peak oscillation as given in the guideline.
Figure 12. BCLK, TCK, PICCLK Generic Clock Waveform at the Processor Edge Fingers
T3
V3
2
V4
4
5
V7
V6
1
T6T4T5
V5
V3
54Datasheet
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Intel
Celeron® Processor up to 1.10 GHz
3.2AGTL+ Signal Quality Specifications and Measurement
Guidelines
Many scenarios have been simulated to generate a set of AGTL+ lay out g ui delines which are
available in AP-585, Pentium
the Pentium
®
II Processor Developer's Manual (Order Number 243502) for the AGTL+ buffer
®
II Processor AGTL+ Guidelines (Order Number 243330). Refer to
specification.
Table 31 provides the AGTL+ signal quality specifications (for both the S.E.P. and PPGA
Packages) for use in simulating signal quality at the processor core. Table 32 provides the AGTL+
signal quality specifications (for the FC-PGA/FC-PGA2 packages) for use in simulating signal
quality at the processor core. Table 33 provides AG TL+ signal qu ality guidelines for measuri ng and
testing signal quality at the processor edge fingers. Figure 13 describes the si gnal qualit y wa veform
for AGTL+ signals at the processor core and edge fingers. For more information on the AGTL+
interface, see the Pentium
®
II Processor Developer's Manual (Order Number 243502).
T able 31. AGTL+ Signal Groups Ringback Tolerance Specifications at the Processor Core
(For Both the S.E.P. and PPGA Packages)
T# ParameterMinUnitFigureNotes
: Overshoot100mV134
α
τ: Minimum Time at High1.00ns134
ρ: Amplitude of Ringback–100mV134, 5
φ: Final Settling Voltage100mV134
δ: Duration of Squarewave RingbackN/Ans13
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. Specifications are for the edge rate of 0.3 – 0.8 V/ns. See Figure 13 for the generic waveform.
3. All values specified by design characterization.
4. This specification applies to Inte l Celeron processors operating with a 66 MHz Intel Celeron processor
system bus only.
5. Ringback below V
REF + 20 mV is not supported.
Ta ble 32. AGTL+ Signal Groups Ringback Tolerance Specifications at the Processor Pins
(For FC-PGA/FC-PGA2 Packages)
T# ParameterMinUnitFigureNotes
: Overshoot 100mV134, 8, 9, 10
α
τ: Minimum Time at High 0.50ns139
ρ: Amplitude of Ringback –200mV135, 6, 7, 8
φ: Final Settling Voltage 200mV138
δ: Duration of Squarewave Ringback N/Ans13
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Celeron processor frequencies.
2. Specifications are for the edge rate of 0.3 – 0.8V/ns. See Figure 13 for the generic waveform.
3. All values specified by design characterization.
4. See Table 36 for maximum allowable overshoot.
5. Ringback between V
flight time measurements to be adjusted as described in the Intel AGTL+ Specifications (
Developers Manual
6. Intel recommends simulations not exceed a ringback value of V
sources of system noise.
7. A negative value for
signal cannot ringback below V
φ and ρ: are measured relative to VREF. α: is measured relative to VREF + 200 mV.
8.
9. All Ringback entering the Overdrive Region must have flight time correction.
10.Overshoot specifications for Ringback do not correspond to Overshoot specifications in Section 3.4.
REF + 100 mV and VREF+ 200 mV or VREF – 200 mV and VREF– 100 mVs requires the
Intel®Pentium®II
). Ringback below VREF + 100 mV or above VREF – 100 mV is not supported.
REF ±200 mV to allow margin for other
ρ indicates that the amplitude of ringback is above VREF. (i.e., φ = –100 mV specifies the
REF + 100 mV).
Datasheet55
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Intel
Celeron® Processor up to 1.10 GHz
Table 33. AGTL+ Signal Groups Ringback Tolerance Guidelines for Edge Finger
Measurement on the S.E.P. Package
T# ParameterMinUnitFigureNotes
α
’: Overshoot100mV13
τ’: Minimum Time at High1.5ns134
ρ’: Amplitude of Ringback–250mV134, 5
φ’: Final Settling Voltage250mV134
δ’: Duration of Squarewave RingbackN/Ans13
NOTES:
1. Unless otherwise noted, all guidelines in this table apply to all Celeron processor frequencies.
2. Guidelines are for the edge rate of 0.3 – 0.8 V/ns. See Figure 13 for the generic waveform.
3. All values specified by design characterizat ion.
4. This guideline applies to Intel Celeron processors operating with a 66 MHz system bus only.
5. R ingback below V
REF + 250 mV is not supported.
Figure 13. Low to High AGTL+ Receiver Ringback Toler ance
V +0.2
REF
V
REF
V –0.2
REF
V
start
Note: High to Low case is anal ogous.
τ
α
φ
ρ
δ
Time
0.7V Clk Ref
Clock
56Datasheet
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Intel
Celeron® Processor up to 1.10 GHz
3.3Non-AG TL+ Signal Qualit y Specifications and Measurement
Guidelines
There are three signal quality parameters defined for non-AGTL+ signals: overshoot/undershoot,
ringback, and settling limit. All three signal quality parameters are shown in Figure 14 for the nonAGTL+ signal group.
Figure 14. Non-AGTL+ Overshoot/Undershoot, Settling Limit, and Ringback
Overshoot
V
HI
Settling Limit
V
LO
V
SS
NOTES:
1. For the FC-PGA/FC-PGA2 packages, V
PWRGOOD. V
Section 3.1.
= 2.5 V for BCLK, PICCLK, and PWRGOOD. BCLK and PICCLK signal quality is detailed in
HI
Time
= 1.5 V for all non-AGTL+ signals except for BCLK, PICCLK, and
HI
3.3.1Overshoot/Undershoot Guidelines
Rising-Edge
Ringback
Undershoot
Settling Limit
Falling-Edge
Ringback
Overshoot (or undershoot) is the absolute value of the maximum voltage above the nominal high
voltage or below V
SS. The overshoot/undershoot guideline limits transitions beyond VCC or VSS
due to the fast signal edge rates. (See Figure 14 for non-AGTL+ signals.) The processor can be
damaged by repeated overshoot events on the volt age t oleran t buffers if the charge is lar ge enou gh
(i.e., if the overshoot is great enough). The PPGA and S.E.P. packages have 2.5 V tolerant buffers
and the FC-PGA/FC-PGA2 packages has 1.5 V or 2.5 V tolerant buffers.
However, excessive ringback is the dominant detrimental system timing effect resulting from
overshoot/undershoot (i.e., violating the overshoot/undershoot guideline will make satisfying the
ringback specification difficult). The overshoot/undershoot guideline is 0.7 V for the PPGA and S.E.P. packages and 0.3 V for the FC-PGA/FC-PGA2 packages and assumes the absence
of diodes on the input. These guidelines should be verified in simulations without the on-chip ESD prote cti on d i od es p resent because the diodes will begin clamping the signals (2.5 V tolerant
signals for the S.E.P. and PPGA packages, and 2.5 V or 1.5 V tolerant signals for the FC-PGA/
FC-PGA2 packages) beginning at approximately 0.7 V above the appropriate supply and 0.7 V
below V
SS. If signals are not reaching the clamping voltage, this will not be an issue. A system
should not rely on the diodes for overshoot/undershoot protection as this will negatively affect the
life of the components and make meeting the ringback specification very difficult.
Datasheet57
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Intel
Celeron® Processor up to 1.10 GHz
3.3.2Ringback Specification
Ringback refers to the amount of reflection seen after a signal has switched. The ringback
specification is the voltage that the signal rings back to after achieving its maximum absolute value. (See Figure 14 for an illustration of ringback.) Excessive ringback can cause false signal
detection or extend the propagation delay. The ringback specification applies to the input pin of
each receiving agent. Violations of the signal ringback specification are not allowed under any
circumstances for non-AGTL+ signals.
Ringback can be simulated with or without the input protection diodes that can be added to the
input buffer model. However, signals that reach the clamping voltage should be evaluated further.
See Ta ble 34 for the signal ringback specifications for non-AGTL+ signals for simulations at the
processor core, and Table 35 for guidelines on measuring ringback at the edge fingers. Table 36
lists the ringback specifications for the FC-PGA/FC-PGA2 packages.
T able 34. Signal Ringback Specifications for Non-AGTL+ Signal Simulation at the Processor
1. Unless otherwise noted, all specifications in this table apply to all FC-PGA/FC-PGA2 processor frequencies
and cache sizes.
58Datasheet
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Intel
Celeron® Processor up to 1.10 GHz
3.3.3Settling Limit Guideline
Settling limit defines the maximum amount of ringing at the receiving pin that a signal must reach
before its next transition. The amount allowed is 10 percent of the total signal swing (V
HI
above and below its final value. A signal should be within the settling limits of its final value, when
either in its high state or low state, before it transitions again.
Signals that are not within their settling limit before transitioning are at risk of unwanted
oscillations which could jeopardize signal integrity. Simulations to verify settling limit may be
done either with or without the input protection diodes present. Violation of the settling limit
guideline is acceptable if simulations of 5 to 10 successive transitions do not show the amplitude of
the ringing increasing in the subsequent transitions.
3.4AGTL+ Signal Quality Specifications and Measurement
Guidelines (FC-PGA/FC-PGA2 Packages)
Overshoot (or undershoot) is the absolute value of the maximum voltage above the nominal high
voltage or below V
signal edge rates. The processor can be damaged by repeated overshoot events on 1.5 V or 2.5 V
tolerant buffers if the charge is large enough (i.e., if the overshoot is great enough). Determining
the impact of an overshoot/undershoot condition requires knowledge of the magnitude, the pulse
direction and the activity factor (AF). Permanent damage to the processor is the likely result of
excessive overshoot/undershoot. Violating the overshoot/undershoot guideline will also make
satisfying the ringback specification difficult.
SS. The overshoot guideline limits transitions beyond VCC or VSS due to the fast
– V
LO
)
When performing simulations to determine impact of overshoot and overshoot, ESD diodes must
be properly characterized. ESD protection diodes do not act as voltage clamps an d will not provide
overshoot or undershoot protection. ESD diodes modeled within Intel I/O Buffer models do not
clamp undershoot or overshoot and will yield correct simulation results. If other I/O buffer models
are being used to characterize the FC-PGA/FC-PGA2 processor performance, care must be taken
to ensure that ESD models do not clamp extreme voltage levels. Intel I/O Buffer models also
contain I/O capacitance characterization. Therefore, removing the ESD diodes from an I/O Buffer
model will impact results and may yield excessive overshoot/undershoot.
Magnitude describes the maximum potential difference between a signal and its voltage reference
level, V
using one probe (probe to signal and GND lead to V
V
signal undershoot. Today’s oscillosco pes can easily calcula te the true un dershoot wa veform using a
Math function where the Signal waveform is subtracted from the V
undershoot waveform can also be obtained with the following oscilloscope data file analysis:
Note:The converted undershoot waveform appears as a positive (overshoot) signal.
Note:Overshoot (rising edge) and undershoot (falling edge) conditions are separate and their impact
must be determined independently.
SS (overshoot) and VTT (undershoot). While overshoot can be measured relative to VSS
SS), undershoot must be measured relative to
TT. This can be accomplished by simultaneously measuring the VTT plane while measuring the
After the true waveform conversion, the undershoot/overshoot specifications shown in Table 38
and Table 39 can be applied to the converted undershoot waveform using the same magnitude and
pulse duration specifications used with an overshoot waveform.
Overshoot/undershoot magni tude levels mus t observe the Absolut e Maximum Speci fications lis ted
in Table 38 and Table 39. These specifications must not be violated at any time regardless of bus
activity or system state. Within these specifications are threshold levels that define different
allowed pulse durations. Provided that the magnitude of the overshoot/undershoot is within the
Absolute Maximum Specifications (2.18V), the puls e magnitude, duration and activity factor must
all be used to determine if the overshoot/undershoot pulse is within specifications.
Pulse duration describes the total time an overshoot/undershoot event exceeds the overshoot/
undershoot reference voltage (Vos_ref = 1.635 V). The total time could encompass several
oscillations above the reference voltage. Multiple overshoot/undershoot pulses within a single
overshoot/undershoot event may need to be measured to determine the total pulse duration.
Note:Oscillations below the reference voltage can not be subtracted from the total overshoot/undershoot
pulse duration.
Note:Multiple Overshoot/Undershoot events occurring within the same clock cycle must be considered
together as one event. Using the worst case Overshoot/Undershoot Magnitude, sum together the
individual Pulse Durations to determine the total Overshoot/Undershoot Pulse Duration for that
total even t .
3.4.4Acti vity Factor (FC-PGA/FC-PGA2 Packages)
Activity Factor (AF) describes the frequency of overshoot (or undershoot) occurrence relative to a
clock. Since the highest frequency of assertion of an AGTL+ or a CMOS signal is every other
clock, an AF = 1 indicates that the specific overshoot (or undershoot) waveform occurs EVERY
OTHER clock cycle. Thus, an AF = 0.01 indicates that the specific overshoot (or undershoot)
waveform occurs one time in every 200 clock cycles.
The specifications provided in Table 38 and Table 39 show the Maximum Pulse Duration allowed
for a given Overshoot/Undershoot Magnitude at a specific Activity Factor. Each table entry is
independent of all others, meaning that the Pulse Duration reflects the existence of overshoot/
undershoot events of that magnitude ONLY. A platform with an overshoot/undershoot that just
meets the pulse duration for a specific magnitude where the AF < 1, means that there can be NO
other overshoot/undershoot events, even of lesser magnitude (note that if AF = 1, then the event
occurs at all times and no other events can occur).
Note:Activity factor for AGTL+ signals is referenced to BCLK frequency.
Note:Activity factor for CMOS signals is referenced to PICCLK frequency.
The overshoot/undershoot specification for the FC-PGA/FC-PGA2 packages processor is not a
simple single value. Instead, many factors are needed to determine the over/undershoot
specification. In additi on to t he mag nit ude o f the overshoot, the following parameters must also be
known: the junction temperature the processor will be operating, the width of the overshoot (as
measured above 1.635 V) and the Activity Factor (AF). To determine the allowed overshoot for a
particular overshoot event, the following must be done:
1. Determine the signal group that particular signal falls into. If the signal is an AGTL+ signal
operating with a 66 MHz system bus, use Table 38 (66 MHz AGTL+ signal group). If the
signal is a CMOS signal, use Table 39 (33 MHz CMOS signal group).
2. Determine the maximum junction temperature (Tj) for the range of pro cessor s that the system
will support (80
o
C or 90oC).
3. Determine the Magnitude of the overshoot (relative to V
4. Determine the Activity Factor (how often does this overshoot occur?)
5. From the appropriate Specification table, read off the Maximum Pulse Duration (in ns)
allowed.
6. Compare the specified Maximum Pulse Duration to the signal being measured. If the Pulse
Duration measured is less than the Pulse Duration shown in the table, then the signal meets the
specifications.
The above procedure is similar for undershoots after the undershoot waveform has been converted
to look like an overshoot. Undershoot events must be analyzed separately from Overshoot events
as they are mutually exclusive.
Table 37 shows an example of how the maximum pulse duration is determined for a given
waveform.
T a ble 37. Example Platform Information
Required InformationMaximum Platform SupportNotes
FSB Signal Group66 MHz AGTL+
Max Tj90 °C
Overshoot Magnitude2.13VMeasured Value
Activity Factor (AF)0.1
SS)
Measured overshoot occurs on
average every 20 clocks
NOTES:
1. Corresponding Maximum Pulse Duration Specification – 3.2 ns
2. Pulse Duration (measured) – 2.0 ns
Given the above parameters, and using Table 38 (90oC/AF=0.1 column) the maximum allowed
pulse duration is 3.2 ns. Since the measured pulse duration is 2.0ns, this parti cul ar ov ers hoo t event
passes the overshoot specifications, although this doesn't guarantee that the combined overshoot/
undershoot events meet the specifications.
Datasheet61
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Celeron® Processor up to 1.10 GHz
3.4.6Determining if a System meets the Overshoot/Undershoot
Specifications (FC-PGA/FC-PGA2 Pack ages)
The overshoot/undershoot specifications listed in the following tables specify the allowable
overshoot/undershoot for a single overshoot/undershoot event. However most systems will have
multiple overshoot and/or undershoot events that each have their own set of parameters (duration,
AF and magnitude). While each overshoot on its own may meet the overshoot specification, when
the total impact of all overshoot events is accounted for, the system may fail. A guideline to ensure
a system passes the oversh oot and undershoot specifications is shown below. It is important to meet
these guidelines; otherwise, contact your Intel field representative.
1. Insure no signal (CMOS or AGTL+) ever exceed the 1.635 V; OR
2. If only one oversho ot/un dershoot event magn itude o ccurs, ensure it meets the ove r/unders hoot
specifications in the following tables; OR
3. If multiple overshoots and/or multiple undershoots occur, measure the worst case pulse
duration for each magnitude and compare the r esults against th e AF = 1 specification s. If all of
these worst case overshoot or undershoot events meet the specifications
(measured time < specifications) in the table (where AF=1), then the system passes.
The following notes apply to Table 38 and Table 39.
NOTES:
1. Overshoot/Undershoot Magnitude = 2.18 V is an Absolute value and should never be exceeded
2. Overshoot is measured relative to V
3. Undershoot is measured relative to VTT
4. Overshoot/Undershoot Pulse Duration is measured relative to 1.635 V.
5. Ringbacks below V
TT can not be subtracted from Overshoots/Undershoots.
6. Lesser Undershoot does not allocate longer or larger Overshoot.
7. Consult the appropriate layout guidelines provided in the specific platform design guide.
8. All values specified by design characterization.
SS
Table 38. 66 MHz AGTL+ Signal Group Overshoot/Undershoot Tolerance at Processor Pins
(FC-PGA/FC-PGA2 Packages)
Overshoot/
Undershoot
Magnitude
2.18 V303.80.38181.80.18
2.13 V307.40.74303.20.32
2.08 V3013.61.36306.40.64
2.03 V30252.530121.1
1.98 V30304.5630222
1.93 V30308.230303.8
1.88 V 30301530306.8
NOTES:
1. BCLK period is 30.0 ns.
2. Measurements taken at the processor socket pins on the solder-side of the motherboard.
Maximum Pulse Duration at Tj = 80 °C
(ns)
AF = 0.01AF = 0.1AF = 1AF = 0.01AF = 0.1AF = 1
Maximum Pulse Duration at Tj = 90 °C
(ns)
62Datasheet
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Intel
Celeron® Processor up to 1.10 GHz
Table 39. 33 MHz CMOS Signal Group Overshoot/Undershoot Tolerance at Processor Pins
(FC-PGA/FC-PGA2 Packages)
Overshoot/
Undershoot
Magnitude
2.18 V607.60.76363.60.36
2.13 V6014.81.48606.40.64
2.08 V6027.22.76012.81.2
2.03 V6050560242.2
1.98 V60609.160444
1.93 V606016.460607.6
1.88 V606030606013.6
NOTES:
1. PICCLK period is 30 ns.
2. Measurements taken at the processor socket pins on the solder-side of the motherboard.
Maximum Pulse Duration at Tj = 80 °C
(ns)
AF = 0.01AF = 0.1AF = 1AF = 0.01AF = 0.1AF = 1
Maximum Pulse Duration at Tj = 90 °C
Figure 15. Maximum Acceptable AGTL+ Overshoot/Undershoot Waveform
(FC-PGA/FC-PGA2 Packages)
Time Dependent
Overshoot
2.18V
2.08V
1.98V
1.88V
1.635V
Max
V
TT
(ns)
Converted Undershoot
Waveform
Vss
Overshoot
Magnitude
Undershoot
Magnitude
Overshoot
Magnitude
= Signal - Vss
= V
- Signal
TT
Undershoot
Magnitude
Time Dependent
Undershoot
Datasheet63
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Intel
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3.5Non-AG TL+ Signal Quality Specifications and Meas urement
Guidelines
There are three signal quality parameters defined for non-AGTL+ signals: overshoot/undershoot,
ringback, and settling limit. All three signal quality parameters are shown in Figure 16 for the nonAGTL+ signal group.
Figure 16. Non-AG TL+ Overshoot/Undershoot, Settling Limit, and Ringback
1
Overshoot
V
HI
Rising-Edge
Ringback
Settling Limit
V
LO
V
SS
NOTES:
1. V
= 1.5 V for all non-AGTL+ signals except for BCLK, PICCLK, and PWRGOOD. V
HI
PICCLK, and PWRGOOD. BCLK and PICCLK signal quality is detailed in Section 3.1.
Time
Undershoot
Settling Limit
Falling-Edge
Ringback
= 2.5 V for BCLK,
HI
64Datasheet
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Intel
Celeron® Processor up to 1.10 GHz
4.0Thermal Specifications and Design Considerations
This section provides needed data for designing a thermal solution. However, for the correct
thermal measuring processes, refer to AP-905, IntelGuidelines (Order Number 245087). For the FC-PGA/FC-PGA2 using flip chip pin grid array
packaging technology, Intel specifies the junction temperature (T
and PPGA package, Intel specifies the case temperature (T
4.1Thermal Specifications
Table 40 provides both the Processor Power and Heatsink Design Target for Celeron processors.
Processor Power is defined as the total power dissipated by the processor core and its package.
Therefore, the S.E.P. Package’s Processor Power would also include power dissipated by the
AGTL+ termination resistors. The overall system chassis thermal design must comprehend the
entire Processor Power. The Heatsink Design Target consists of only the processor core, which
dissipates the majority of the thermal power.
Systems should design for the highest possible thermal power, even if a processor with a lower
thermal dissipation is planned. The processor ’s heatslug is the attach location for all thermal
solutions. The maximum and minimum cas e temperatures are also specif ied in Table 40. A thermal
solution should be designed to ensure the temperature of the case never exceeds these
specifications. Refer to the Intel developer Web site at http://developer.intel.com for more
information.
®
Pentium® III Processor Thermal Design
). For the S.E.P. package
junction
).
case
Datasheet65
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Intel
Celeron® Processor up to 1.10 GHz
Table 40. Processor Power for the PPGA and FC-PGA Packages
2. Thermal Design Power (TDP) represents the maximum amount of power the thermal solution is required to
for the processor core.
CORE
dissipate. The thermal solution should be designed to dissipate the TDP power without exceeding the
maximum T
3. FC-PGApackage only.
JUNCTION
4. The Thermal Design Power (TDP) Celeron
values are based on device characterization and do not reflect any silicon design changes to lower processor
power consumption. The TDP values represent the thermal design point required to cool Celeron
specification.
®
processors in production has been redefined. The updated TDP
®
processors in the platform environment while executing thermal validation type software.
5. Power density is the maximum power the processor die can dissipate (i.e., processor power) divided by the
die area over which the power is generated. Power for these processors is generated from the core area
shown in Figure 17.
6. T
junctionoffset
hottest location on the processor’s core. T
measurement error. Diode kit measurement error must be added to the T
Intel has characterized the use of the Analog Devices AD1021 diode measurement kit and found its
measurement error to be ±1
is the worst-case difference between the thermal reading from the on-die thermal diode and the
junctionoffset
o
C.
values do not include any thermal diode kit
junctionoffset
value from the table.
7. For processors with a CPUID of 0683h, the TDP number is 11.2 W.
8. For processors with a CPUID of 0683h, the TDP number is 11.9 W.
9. For processors with a CPUID of 0683h, the TDP number is 12.6 W.
10.The Tj min for processors with a CPUID of 068x is 0
o
C with a 3 oC– 5 oC margin error.
66Datasheet
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Celeron® Processor up to 1.10 GHz
T a ble 41. Intel® Celeron® Processor for the FC-PGA2 Package Thermal Design Power 1
Processor
90090010030.0725
95095010032.0725
1 GHz100010033.9695
NOTES:
1. These values are specified at nominal VCC
2. Thermal Design Powe r (TDP) represents the maximum amount of power the thermal solution is required to
dissipate. The thermal solution should be designed to dissipate the TDP power without exceeding the
maximum Tc ase specification.
3. TDP does not represent the power delivery and voltage regulation requirements for the processor. Refer to
Table 5 for voltage regulation and electrical specifications.
4. T
CaseOffset
temperature on the processor’s core. For more information refer to the document,
Processor in the FC-PGA2 Package Thermal Design Guide.
5. This processor exi sts in both FC-PGA and FC-PGA2 packages.
Processor Core
Frequency (MHz)
is the worst-case difference between the maximum case temperature and the thermal diode
System Bus
Frequency (MHz)
for the processor pins.
CORE
Processor
Thermal Design
CPUID 068Ah (W)
Power
2,3
Maximum
4
(°C)
T
case
Intel® Pentium® III
Additional
Notes
Figure 17 is a block diagram of the Intel Celeron FC-PGA/FC-PGA2 processor die layout. The
layout differentiates the processor core from the cache die area. In ef fect, the thermal desi gn power
identified in Table 40 is dissipated entirely from the processor core area. Thermal solution designs
should compensate for this smaller heat flux area and not assume that the power is uniformly
distributed across the entire die area.
Figure 17. Processor Functional Die Layout (CPUID 0686h)
(1)
0.337”
0.275”
Die Area = 0.90 cm
Cache Area = 0.26 cm
Core Area = 0.64 cm
2
2
2
0.146”
Cache Area
0.04 in
0.414”Core Area
0.10 in
1. For CPUID 0x68A, the die area is 0.94 cm2, the cache area is 0.30 cm2, and the core area is 0.64 cm2.
Figure 18. Processor Functional Die Layout (up to CPUID 0683h)
0.362”
0.292”
Die Area = 1.05 cm
Cache Area = 0.32 cm
Core Area = 0.73 cm
2
2
2
0.170”
0.448”
Cache Area
0.05 in
Core Area
0.11 in
2
2
2
2
Die Area
0.14 in
Die Area
0.16 in
2
2
Datasheet67
®
Intel
Celeron® Processor up to 1.10 GHz
4.1.1Thermal Diode
The Celeron processor incorporates an on-die diode that can be used to monitor the die
temperature. A thermal sensor located on the motherboard or a standalone measurement kit may
monitor the die temperature of the Intel Celeron processor for thermal management purposes.
Table 42 to Tabl e 44 provide the diode parameter and interface specifications.
Note:The reading of the thermal sensor connected to the thermal diode will not necessarily reflect the
temperature of the hottest location on the die. This is due to inaccuracies in the thermal sensor, ondie temperature gradients between the location of the thermal diode and the hottest location on the
die at a given point in time, and time based variations in the die temperature measurement. Time
based variations can occur when the sampling rate of the thermal diode (by the thermal sensor) is
slower than the rate at which the T
Table 42. Thermal Diode Parameters (S.E.P. and PPGA Packages)
SymbolMinTypMaxUnitNotes
I
forward bias
n_ideality1.00001.00651.01732,3
NOTES:
1. Intel does not support or recommend operation of the thermal diode under reverse bias.
2. At room temperature wi th a forward bias of 630 mV.
3. n _ideality is the diode ideality factor parameter, as represented by the diode equation:
I-Io(e (Vd*q)/(nkT) – 1).
4. N ot 100% tested. Specified by design characterization.
1. Intel does not support or recommend operation of the thermal diode under reverse bias.
2. C haract eri zed at 100° C with a forward bias current of 5–300 µA.
3. The ideality fac tor, n, represents the deviation from ideal diode behavior as exemplified by the diode
equation:
=Is(e^ ((Vd*q)/(nkT)) – 1), where Is = saturation current, q = electronic charge, Vd = voltage across the
I
fw
diode, k = Boltzmann Constant, and T = absolute temperature (Kelvin).
4. N ot 100% tested. Specified by design characterization.
5300uA1
Table 44. Thermal Diode Interface
Pin Name
THERMDPB14AL31diode anode (p junction)
THERMDNB15AL29diode cathode (n junction)
SC242 Connector
Signal #
370-Pin Socket Pin #Pin Description
68Datasheet
5.0Mechanical Specifications
There are three package technologies which Celeron processors use. They are the S.E.P. Package,
the PPGA package, and the FC-PGA/FC-PGA2 packages. The S.E.P. Package and FC-PGA/
FC-PGA2 packages contain the processor core and passive components, while the PPGA package
does not have passive components.
The processor edge connector defined in this document is referred to as the “SC242 connector.”
See the SC242 Design Guidelines (Order Number 243397) for further details on the edge
connector.
The processor socket connector is defined in this document is referred to as the “370-pin socket.”
See the 370-Pin Socket (PGA370) Design Guidelines (Ord er Number 244410 ) for furth er details on
the socket.
5.1S.E.P. Package
This section defines the mechanical specifications and signal definitions for the Celeron processor
in the S.E.P. Package.
®
Intel
Celeron® Processor up to 1.10 GHz
5.1.1Materials Information
The Celeron processor requires a retention mechanism. This retention mechanism may require
motherboard holes to be 0.159" diameter if low cost plastic fasteners are used to secure the
retention mechanisms. The larger diameter holes are ne cessary to provide a r obust structural design
that can shock and vibe testing. If captive nuts are used in place of the plas tic fastener s, then either
the 0.159" or the 0.140" diameter holes will suffice as long as the attach mount is used.
Figure 19 with substrate dimensions is provided to aid in the design of a heatsink and clip. In
Figure 20 all area on the secondary side of the substrate is zoned “keepout”, except for 25 mils
around the tooling holes and the top and side edges of the substrate.
Figure 20. Processor Substrate Primary/Secondary Side Dimensions (S.E.P. Package)
Typ Max.
.025
Non-Keepout Area
-D-
Secondary Side
Typ Max.
.025
Non-Keepout Area
There Will be No Components on
Secodonary Side
-E-
Typ Max.
.025
Non-Keepout Area
-H-
-G-
-H-
-G-
Primary Side
.025
Non-Keepout Ar
-D-
-E-
Typ Max.
5.1.2 Signal Listing (S.E.P. Package)
Table 45 and Table 46 provide the processor edge finger and SC242 connector signal definitions
for Celeron processor. The signal locations on the SC242 edge connector are to be used for signal
routing, simulation, and component placement on the motherboard.
70Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
T able 45. S.E.P . Package Signal Listing
by Pin Number
Pin
No.Pin NameSignal Buffer Type
A1VTTPower/Other
A2V
A3V
A4IERR#CMOS Output
A5A 20M#CMOS Input
A6V
A7FERR#CMOS Output
A8I G NNE#CMOS Input
A9TDIT A P Input
A10V
A1 1TDOTAP Outp u t
A12PWRGOODCMOS Input
A13TESTHICMOS Test Input
A14V
A15THERMTRIP#CMOS Output
A16ReservedReserved for Future Use
A17LINT0/INTRCMOS Input
A18V
A19PICD0APIC I/O
A20PREQ#CMOS Input
A21BP3#AGTL+ I/O
A22V
A23BPM0#AGTL+ I/O
ReservedA116Reserved for Future Use
ReservedB12Reserved for Future Use
ReservedA113Reserved for Future Use
ReservedB20Reserved for Future Use
ReservedB76Reserved for Future Use
ReservedB112Reserved for Future Use
ReservedB79
ReservedB114
ReservedB115
Pin
No.Signal Buffer Type
Reserved for Pentium
processor
Reserved for Pentium
processor
Reserved for Pentium
processor
Reserved for Pentium
processor
II
II
II
II
76Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
T able 46. S.E.P . Package Signal Listing
by Signal Name
Pin Name
ReservedA117
ReservedB116
ReservedA24
ReservedA76
ReservedB75Reserved for Future Use
ReservedA79
E23ReservedReserved for Future Use
E25D62#Power/Other
E27ReservedReserved for Future Use
E29ReservedReserved for Future Use
E31ReservedReserved for Future Use
E33V
REF0Power/Other
E35BPM1#AGTL+ I/O
E37BP3#AGTL+ I/O
F2V
F4V
CC
CC
CORE
CORE
F6D32#A GTL+ I/O
F8D22#A GTL+ I/O
F10ReservedReserved for Future Use
F12D27#AGTL+ I/O
F14V
G33BP2#AGTL+ I/O
G35ReservedReserved for Future Use
G37ReservedReserved for Future Use
H2V
H4D16#AGTL+ I/O
H6D19#AGTL+ I/O
H32V
H34V
H36V
J1D7#AGTL+ I/O
J3D30#AGTL+ I/O
J5V
J33PICCLKAPIC Clock Input
J35PICD0APIC I/O
J37PREQ#CMOS Input
K2V
K4V
K6D24#AG TL+ I/O
K32V
K34V
K36V
L1D13#AGTL+ I/O
L3D20#AGTL+ I/O
L5V
L33ReservedReserved for Future Use
L35PICD1APIC I/O
L37LINT1/NM ICMOS Input
M2V
M4D11#AGTL+ I/O
M6D3#AGTL+ I/O
M32V
M34V
M36LINT0/INTRCMOS Input
N1D2#AG TL+ I/O
N3D14#AGTL+ I/O
N5V
N33ReservedReserved for Future Use
N35ReservedReserved for Future Use
SSPower/Other
CC
CORE
SSPower/Other
CC
CORE
CC
CORE
CC
CORE
REF2Power/Other
CC
CORE
CC
CORE
SSPower/Other
SSPower/Other
SSPower/Other
CC
CORE
SSPower/Other
CC
CORE
Power/Other
Power/Other
Power/Other
Power/Other
Power/Other
Power/Other
Power/Other
Power/Other
Datasheet85
®
Intel
Celeron® Processor up to 1.10 GHz
T able 49. PPGA Package Signal Listing
by Pin Number
Pin
No.Pin NameSignal Buffer Type
N37ReservedReserved for Future Use
P2V
CC
CORE
P4D18 #AGTL+ I/O
P6D9#AGTL+ I/O
P32V
P34V
P36V
SSPower/Other
CC
CORE
SSPower/Other
Q1D12#AGTL+ I/ O
Q3D10#AGTL+ I/ O
Q5V
SSPower/Other
Q33ReservedReserved for Future Use
Q35ReservedReserved for Future Use
Q37ReservedReserved for Future Use
R2ReservedReserved for Future Use
R4D 17#AGTL+ I/O
R6V
R32V
R34V
R36V
REF3Power/Other
CC
CORE
SSPower/Other
CC
CORE
S1D8#AGTL+ I/O
S3D5#AGTL+ I/O
S5V
CC
CORE
S33ReservedReserved for Future Use
S35ReservedReserved for Future Use
S37ReservedReserved for Future Use
T2V
CC
CORE
T4D1#AGTL+ I/O
T6D6#AGTL+ I/O
T32V
T34V
T36V
SSPower/Other
CC
CORE
SSPower/Other
U1D4#AGTL+ I/O
U3D 15#AGTL+ I/O
Power/Other
Power/Other
Power/Other
Power/Other
Power/Other
Power/Other
Power/Other
T able 49. PPGA Package Signal Listing
by Pin Number
Pin
No.Pin NameSignal Buffer Type
U5VSSPower/Other
U33PLL2Power/Other
U35ReservedReserved for Future Use
U37ReservedReserved for Future Use
V2V
V4ReservedReserved for Future Use
V6V
V32V
V34V
V36V
W1D0#AGTL+ I/O
W3ReservedReserved for Future Use
W5V
W33PLL1Power/Other
W35ReservedReserved for Future Use
W37BCLKSystem Bus Clock Input
X2ReservedReserved for Future Use
X4RESET#AGTL+ Input
X6ReservedReserved for Future Use
X32V
X34V
X36V
Y1ReservedReserved for Future Use
Y3A26#AGTL+ I/O
Y5V
Y33V
Y35V
Y37V
Z2V
Z4A29#AGTL+ I/O
Z6A18#AGTL+ I/O
Z32V
Z34V
Z36V
PICD0J35APIC I/O
PICD1L35APIC I/O
PLL1W33Power/Other
PLL2U33Power/Other
PRDY#A35AGTL+ Output
PREQ#J37CMOS Input
PWRGOODAK26CMOS Input
REQ0#AK18AGTL+ I/O
REQ1#AH16AGTL+ I/O
REQ2#AH18AGTL+ I/O
REQ3#AL19AGTL+ I/O
REQ4#AL17AGTL+ I/O
ReservedAC1Reserved for Future Use
ReservedAC37Reserved for Future Use
ReservedAF4Reserved for Future Use
ReservedAK16Reserved for Future Use
ReservedAK24Reserved for Future Use
ReservedAK30Reserved for Future Use
ReservedAL11Reserved for Future Use
ReservedAL13Reserved for Future Use
ReservedAL21Reserved for Future Use
ReservedAN11Reserved for Future Use
ReservedAN13Reserved for Future Use
ReservedAN15Reserved for Future Use
ReservedAN21Reserved for Future Use
ReservedAN23Reserved for Future Use
ReservedB36Reserved for Future Use
ReservedC29Reserved for Future Use
ReservedC31Reserved for Future Use
ReservedC33Reserved for Future Use
ReservedE23Reserved for Future Use
ReservedE29Reserved for Future Use
ReservedE31Reserved for Future Use
ReservedF10Reserved for Future Use
ReservedG35Reserved for Future Use
ReservedG37Reserved for Future Use
ReservedL33Reserved for Future Use
ReservedN33Reserved for Future Use
ReservedN35Reserved for Future Use
ReservedN37Reserved for Future Use
Pin
No.Signal Buffer Type
88Datasheet
®
Intel
Celeron® Processor up to 1.10 GHz
T able 50. PPGA Package Signal Listing
in Order by Signal Name
Pin Name
ReservedQ33Reserved for Future Use
ReservedQ35Reserved for Future Use
ReservedQ37Reserved for Future Use
ReservedS33Reserved for Future Use
ReservedS37Reserved for Future Use
ReservedU35R eserved for Future Use
ReservedU37R eserved for Future Use
ReservedV4Reserved for Future Use
ReservedW3Reserved for Future Use
ReservedW35Reserved for Future Use
ReservedAH20Reserved for Future Use
ReservedAH4Reserved for Future Use
ReservedA29Reserved for Future Use
ReservedA31Reserved for Future Use
ReservedA33Reserved for Future Use
ReservedAA33Reserved for Future Use
ReservedAA35Reserved for Future Use
ReservedX6Reserved for Future Use
ReservedY1Reserved for Future Use
ReservedE27Reserved for Future Use
ReservedR2Reserved for Future Use
ReservedS35Reserved for Future Use
ReservedX2Reserved for Future Use
RESET#X4AGTL+ Input
RS0#AH26AGTL+ Input
RS1#AH22AGTL+ Input
RS2#AK28AGTL+ Input
SLP#AH30CMOS Input
SMI#AJ35CMOS Input
STPCLK#AG35CMOS Input
TCKAL33TAP Input
TDIAN35TAP Input
TDOAN37T A P Output
THERMDNAL29Power/Other
THERMDPAL31Power/Other
THERMTRIP#AH28CMOS Output
TMSAK32TAP Input
TRDY#AN25AGTL+ Input
TRST#AN33TAP Input
This section defines the mechanical specifications and signal definitions for the Intel Celeron
processor in the FC-PGA and FC-PGA2 packages.
5.3.1FC-PGA Mechanical Specifications
Figure 23 is provided to aid in the design of heatsink and clip solutions as well as demonstrate
where pin-side capacitors will be located on the processor. Table 51 provides the measurements for
these dimensions in both inches and millimeters.
Figure 23. Package Dimensions (FC-PGA Package)
NOTES:
1. Unless otherwise specified, the following drawings are dimensioned in inches.
2. Al l dimensi ons provi ded with tolerances are guaranteed to be met for all normal production product.
3. Figures and drawings labeled as “Reference Dimensions” are provided for informational purposes only.
Reference dimensions are extracted from the mechanical design database and are nominal dimensions with
no tolerance information applied. Reference dimensions are NOT checked as part of the processor
manufacturing. Unless noted as such, dimensions in parentheses without tolerances are reference
dimensions.
4. Drawing not to scale.
92Datasheet
T a ble 51. Package Dimensions (FC-PGA Package)
MillimetersInches
SymbolMin Max Notes Min Max Notes
A10.7870.8890.0310.035
A21.0001.2000.0390.047
B111.18311.2850.4400.445
B29.2259.3270.3630.368
C123.495 max0.925 max
C221.590 max0.850 max
Pin TP0.508 Diametric True Position (Pin-to-Pin)0.020 Diametric True Position (Pin-to-Pin)
®
Intel
Celeron® Processor up to 1.10 GHz
NOTES:
1. Capacitors and resist ors may be placed on the pin-side of the FC-PGA package in the area defined by G1,
G2, and G3. This area is a keepout zone for motherboard designers.
The bare processor die has mechanical load limits that should not be exceeded during heatsink
assembly, mechanical stress testing, or standard drop and shipping conditions. The heatsink attach
solution must not induce permanent stress into the processor substrate with the exception of a
uniform load to maintain the heatsink to the proces sor thermal interfac e. The package dynamic an d
static loading parameters are listed in Table 52.
For Table 52, the following apply:
1. It is not recommended to use any portion of the processor substrate as a mechanical reference
or load bearing surface for thermal solutions.
2. Parameters assume uniformly applied loads
T a ble 52. Processor Die Loading Parameters (FC-PGA Package)
ParameterDynamic (max)1Static (max)
Silicon Die Surface20050lbf
Silicon Die Edge10012lbf
NOTES:
1. This specif icati on applies to a uniform and a non-uniform load.
2. This is the maximum static force that can be applied by the heatsink and clip to maintain the heatsink and
processor interface.
2
Unit
Datasheet93
®
Intel
Celeron® Processor up to 1.10 GHz
5.3.2Mechanical Specifications (FC-PGA2 Package)
Figure 24 is provided to aid in the design of heatsink and clip solutions as well as demonstrate
where pin-side capacitors will be located on the processor. Table 53 lists the measurements for
these dimensions in both inches and millimeters.
1. This specif icati on applies to a uniform and a non-uniform load.
2. This is the maximum static force that can be applied by the heatsink and clip to maintain the heatsink and
processor interface.
3. See socket manufa ctur er’s force loading specification also to ensure compliance. Maximum static loading
listed here does not account for the maximum reaction forces on the socket tabs or pins.
2,3
Unit
Datasheet95
®
Intel
Celeron® Processor up to 1.10 GHz
5.3.2.1Recommended Mechanical Keep-Out Zones (FC-PGA2 Package)
LINT0/INTRM36CMOS Input
LINT1/NMIL37CMOS Input
LOCK#AK20AGTL+ I/O
PICCLKJ33API C Clock Input
PICD0J35API C I/O
PICD1L35APIC I/O
PLL1W33Power/Other
PLL2U33Power/Other
PRDY#A35AGTL+ Output
PREQ#J37C MO S In put
PWRGOODAK26CMOS Input
REQ0#AK18AGTL+ I/O
REQ1#AH16AGTL+ I/O
REQ2#AH18AGTL+ I/O
REQ3#AL19AGTL+ I/O
REQ4#AL17AGTL+ I/O
ReservedA29Reserved for future use
ReservedA31Reserved for future use
ReservedA33Reserved for future use
ReservedAC1Reserved for future use
ReservedAC37Reserved for future use
ReservedAF4Reserved for future use
ReservedAH20Reserved for future use
ReservedAK16Reserved for future use
ReservedAK24Reserved for future use
ReservedAK30Reserved for future use
ReservedAL11Reserved for future use
ReservedAL13Reserved for future use
ReservedAL21Reserved for future use
ReservedAN11Reserved for future use
ReservedAN13Reserved for future use
ReservedAN15Reserved for future use
ReservedAN21Reserved for future use
ReservedAN23Reserved for future use
ReservedB36Reserved for future use
ReservedC29Reserved for future use
ReservedC31Reserved for future use
ReservedC33Reserved for future use
ReservedE23Reserved for future use
100Datasheet
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