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Copyright 2000, Texas Instruments Incorporated
About This Manual
Notational Conventions
Preface
Read This First
This manual is intended to assist the designer who is attempting to implement
a solution using the PCI4450 or PCI4451. Much, but not all, of the information
contained herein can also be found elsewhere. However, the smaller size of
this manual, as well as its organization by topics of primary interest to the
hardware designer, make it a much more usable source regarding those
problems most likely to be encountered in the design process.
How to Use This Manual
This document contains the following chapters:
Chapter 1,
examples beyond that contained in the data manuals, which will be useful for
implementing solutions using the PCI4450 or PCI4451.
Appendix A,
of those register bits that can only be cleared by a global reset, and of those
register bits used in conjunction with power management events.
Appendix B,
and conditions which can wake up a device that has been placed in partially
functional state for power conservation.
Appendix C,
input and/or output on each terminal of the device.
Notational Conventions
This document uses the following conventions.
Program listings, program examples, and interactive displays are shown
PCI445X Device
Global Reset Only Bits, PME Context Bits
PME and RI Behavior
PCI445X Buffer T ypes
in a special typeface similar to a typewriter’s. Examples use a bold
version of the special typeface for emphasis; interactive displays use a
bold version of the special typeface to distinguish commands that you
, provides the designer with information and
contains tabular listings
, provides truth tables that explain events
, lists the type of signal buffering used for
iii
Contents
enter from items that the system displays (such as prompts, command
output, error messages, etc.).
Here is an example of a system prompt and a command that you might
enter:
C: csr –a /user/ti/simuboard/utilities
In syntax descriptions, the instruction, command, or directive is in a bold
typeface font and parameters are in an
italic typeface
. Portions of a syntax
that are in bold should be entered as shown; portions of a syntax that are
in
italics
describe the type of information that should be entered. Here is
an example of a directive syntax:
.asect “
section name
”,
address
.asect is the directive. This directive has two parameters, indicated by
section name
and
address
. When you use .asect, the first parameter must
be an actual section name, enclosed in double quotes; the second
parameter must be an address.
Square brackets ( [ and ] ) identify an optional parameter. If you use an
optional parameter, you specify the information within the brackets; you
don’t enter the brackets themselves. Here’s an example of an instruction
that has an optional parameter:
LALK
The LALK instruction has two parameters. The first parameter,
constant
16–bit constant [, shift]
, is required. The second parameter,
shift
, is optional. As this
16-bit
syntax shows, if you use the optional second parameter, you must
precede it with a comma.
Square brackets are also used as part of the pathname specification for
VMS pathnames; in this case, the brackets are actually part of the pathname (they are not optional).
Braces ( { and } ) indicate a list. The symbol | (read as
or
) separates items
within the list. Here’s an example of a list:
{ * | *+ | *– }
This provides three choices: *, *+, or *–.
Unless the list is enclosed in square brackets, you must choose one item
from the list.
Some directives can have a varying number of parameters. For example,
the .byte directive can have up to 100 parameters. The syntax for this
directive is:
.byte
iv
value1 [, ... , valuen]
This syntax shows that .byte must have at least one value parameter, but
you have the option of supplying additional value parameters, separated
by commas.
Related Documentation From Texas Instruments
Trademarks
FCC Warning
PCI4450 GFN/GJG PC Card and OHCI Controller Data Sheet
PCI4451 GFN/GJG PC Card and OHCI Controller Data Manual
OHCI.Lynx Configuration Information Application Report
PHY Layout Recommendations Application Report
TSB41LV03A Data Sheet
This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
tested for compliance with the limits of computing devices pursuant to subpart
J of part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.
, SLLS364
, SLLA020A
, SCPS046
, SCPS054
, SLLA077
Trademarks
MicroStar BGA is a trademark of Texas Instruments.
TI is a trademark of Texas Instruments.
Windows is a registered trademark of Microsoft Corporation. (Windows 95, Windows)
This implementation guide assists platform hardware developers designing
with the PCI445X dual socket PC card and 1394 open host controller interface
(OHCI) link layer controller (LLC). The PCI445X designation refers to any
device in the PCI445X family, for example, the PCI4450 or PCI4451 device.
The document includes an overview of the PCI445X function and features,
terminal assignments and pinout illustrations, PCI445X I/O electrical
characteristics, identification of required passive components and
recommendations for system implementation, and PHY/Link interface signal
isolation considerations.
Advantages of the PCI445X device:
G_RST (Section 1.1.2)
Internal ring oscillator (Section 1.3.1)
Zoomed video auto-detect function (Sections 1.1.4, 1.3.2)
Integrated IEEE1394 OHCI link layer controller
Figure 1–1 illustrates a platform using the PCI445X device along with the
TSB41L V03 3-port PHY , which provides the necessary interface to implement
a 3-port IEEE1394 node.
Figure 1–1.Typical System Architecture
CPUMemory
South
Bridge
Sound
Controller
North
Bridge
PCI Bus
Graphics
Controller
Audio
Codec
PC Card
Interrupt / PME / RI
19
PCI445X
ZV
4
14
TSB41LV03A
PHY
2
Power
Switch
EEPROM
Socket
Power
1-2
1.1System Features Selection
This section explains selectable system features. Feature selection is required
for GPIO and MFUNC terminal assignments and PCI445X register
initialization. Detailed system implementation methods are described in the
following sections. All functions cannot necessarily be used at the same time,
because of the limitations of programmable multifunction terminals (i.e.,
MFUNC7–MFUNC0).
1.1.1Package Types
The Texas Instruments PCI445X device is offered in two package types:
256-terminal ball grid array (BGA) and 257-terminal MicroStar BGA.
MicroStar BGA is a type of chip scale packaging (CSP).
1.1.2G_RST and PRST
The PCI445X device has two reset inputs, G_RST and PRST. G_RST resets
all registers and state-machines; PRST
to maintain context in a low power state (see T able A–1and Table A–2). If the
system does not support a wake-up event from D3-state (hot or cold), then
these terminals can be tied together.
System Features Selection
resets registers that are not required
1.1.3PME and RI Signaling
For supporting a wake-up event, a power management event (PME) and/or
an RI signal should be signaled to the system. PME
RI_OUT/PME terminal. RI_OUT is available on RI_OUT/PME or MFUNC7.
PME and RI_OUT signals are usually connected to the south bridge or
embedded controller (EC). Detailed PME and RI signal behavior is explained
later.
is available only on the
1.1.4ZV Support
The PCI445X device has internal zoomed video (ZV) buffers. It can support
three ZV sources, from two PC cards and one external source. Refer to the
detailed implementation guide in Section 1.3.2. The PCI445X device has the
ZV autodetect function for supporting a third external zoomed video source.
ZVSTAT and ZVPCLK are required to support the third source. (The ZV
autodetect function needs ZVPCLK for input, and ZVSTAT for enabling.)
ZVSTAT can be assigned on the MFUNC0, MFUNC1, or MFUNC4 terminal.
1.1.5EEPROM for Subsystem Vendor and Subsystem ID Registers
Subsystem vendor ID and subsystem ID registers (PCI offsets 40h and 42h)
can be loaded from EEPROM through a two-wire serial interface. These
registers can be configured by BIOS if the PCI445X device is implemented on
the motherboard, by setting the SUBSYSRW bit (system control register , PCI
offset 80h, bit 5). EEPROM may be required for docking systems and is
required for add-in cards. The EEPROM interface terminals SDA and SCL are
PCI445X Device
1-3
System Features Selection
automatically assigned on the dedicated SDA and SCL terminals. A pullup
resistor (typically 10 kΩ) must be added on SDA and SCL when using an
EEPROM. The value of the pullup resistor can vary for different EEPROMs.
Refer to the EEPROM data sheet or contact the manufacturer for the
recommended pullup resistor value.
1.1.6PCI and ISA Style Interrupt
The PCI445X device provides three modes of interrupt signaling:
Parallel PCI interrupts only
Parallel PCI interrupts and serialized ISA interrupts
Serialized PCI interrupts and serialized ISA interrupts
Three PCI interrupts (INTA
either the parallel mode using the MFUNC terminals or in the serial mode. The
number of PCI interrupts may be reduced by setting the INTRTIE bit (system
control register, PCI offset 80h, bit 29), which allows both the CardBus
functions (function 0 and function 1) to report and use INTA
TIEALL bit (system control register, PCI offset 80h, bit 28) which allows all 3
functions (both CardBus + OHCI) to report and use INTA.
1.1.7Socket Power Switches
The PCI445X device supports TPS2206 and TPS2216 power switches. Refer
to the detailed explanation on each data sheet. The interface between the
power switch and the PCI445X device is serialized, so an external or internal
clock source is required. By default an external power switch clock is assumed
but this can be changed to use the oscillator internal to the PCI445X device
by setting P
1.1.8Distributed DMA (DDMA)
Most of the systems do not use this function. This function needs PCGNT and
PCREQ signals. PCGNT can be assigned to the MFUNC2 or MFUNC3
terminal. PCREQ can be assigned to the MFUNC0, MFUNC4, or MFUNC7
terminal. (See Section 1.3.4.5, Distributed DMA.)
, INTB, and INTC) may be used and signaled in
or by setting the
2
CCLK bit (system control register, PCI offset 80h, bit 27).
1.1.9Optional PCI Signals
1.1.9.1CLKRUN
CLKRUN is the primary method for power reduction on the PCI bus. Most of
the notebook PCs implement CLKRUN. The PCI445X device has a dedicated
CLKRUN terminal. If it is not used, then a pulldown resistor is required to
prevent oscillations on this input.
1.1.9.2LOCK
This signal can be assigned on the MFUNC1, MFUNC3 or MFUNC7 terminal.
1-4
1.1.10 Socket Activity LEDs
Socket activity signals can be assigned on MFUNC4 (slot 1), MFUNC3 (slot 2),
MFUNC5 (OHCI_LED), MFUNC6 (OHCI_LED), and MFUNC7 (OHCI_LED).
1.1.11 MFUNC7–MFUNC0 Terminal Assignments
After selecting required functions for the system, multifunction terminals
MFUNC7–MFUNC0 are ready to be assigned. Texas Instruments offers
Windows-based software, named TIROUTE.EXE, to assist with terminal
assignment.
1.1.12 Miscellaneous Functions Description
1.1.12.1 Serialized Interrupt Control
Serialized interrupt signaling is described below.
The start frame width may vary from four to eight PCI clock cycles. The STOP
frame width is two clock cycles for quiet mode and three clock cycles for
continuous mode. Default mode is continuous mode for all slave devices and
a host device. PIIX4 does not support IRQ0, IRQ8, and IRQ13.
The PCI445X can generate serial IRQ frames for ISA and PCI interrupts.
Below are related registers and their definitions.
Change PCI interrupt data frame (serial interrupts only)
INTRTIE bit (system control register , PCI offset 80h, bit 29). T ie CardBus
PCI interrupts to INTA
TIEALL bit (system control register, PCI offset 80h, bit 28). Tie all PCI
interrupts internally
Refer to the
Serialized IRQ Support for PCI Systems
revision 6.0.
1.1.12.2 CSC Interrupt Routing for Windows Compatibility
specification,
The CSC interrupt routing control bit (diagnostic register, PCI of fset 93h, bit 5)
should be set to 1 (default) to keep Windows compatibility.
PCI445X Device
1-5
System Features Selection
1.1.12.3 Asynchronous CSC Interrupt Generation
The ASYNC_CSC bit (diagnostic register, PCI offset 93h, bit 0) controls the
CSC interrupt signaling method. If this bit is set to 0, then CSC is generated
synchronously to PCLK (recommended). By default this bit is set to 1, which
is the asynchronous mode.
1.1.12.4 CardBus Reserved Terminal Signaling
The CardBus interface has reserved terminals. Usually the CardBus controller
drives these terminals low. If the CBRSVD bit (system control register, PCI
offset 80h, bit 22) is set to 0, then the CardBus reserved terminal signals are
in a high-impedance state when a CardBus card is inserted in the socket.
1.1.12.5 Memory Burst R/W Operation Control
Memory read bursting is controlled via the MRBURSTDN bit (system control
register, PCI of fset 80h, bit 15) for downstream burst transactions (PCI-to-PC
Card) and the MRBURSTUP bit (system control register, PCI offset 80h,
bit 14) for upstream burst transactions (PC Card-to-PCI). Memory write
bursting is controlled via the POSTEN bit (bridge control register, PCI offset
3Eh, bit 10). This bit enables write posting if disabled. No write data can be
accepted (including burst writes) until any previous write data has been
forwarded to its destination. By default, write posting and upstream read bursts
are disabled.
1.1.12.6 Power Savings Mode
The PCI445X device has a proprietary power-saving mode. It can be disabled
by changing the PWRSAVINGS bit (system control register, PCI offset 80h,
bit 6) to 0. When this bit is enabled (default), PCI CLOCK is internally gated
for a nonfunctioning circuit. For example, the CardBus interface does not
function when a 16-bit card is inserted. This power-saving mode will not
degrade performance; therefore, the default setting is recommended.
1.1.12.7 PME/RI_OUT Terminal Control Clarification
PME/RI_OUT terminal can be set up to signal a combination of these events.
The terminal is set up using the PME/RI_OUT bit (system control register, PCI
offset 80h, bit 0), the RIENB bit (card control register , PCI offset 91h, bit 7), and
PME enable bit (power management control/status, PCI offset A4h, bit 8). If
the terminal is set up as RI_OUT
this signal follows the RI_OUT signal for 16-bit I/O cards. If RIENB has ring
indicate disabled but PME has PME enabled, then this line reflects the state
of the PMESTAT bit (power management control/status, PCI offset A4h,
bit 15). If both PME
and ring indicate are disabled, then the line remains high.
If the line is configured as PME and PME is enabled, then this line follows the
state of the PMESTAT bit; otherwise, the line remains high.
1.1.12.8 CLKRUN Control
and RIENB has ring indicate enabled, then
1-6
PCLK can be kept running using CLKRUN protocol by setting the KEEPCLK
bit (system control register, PCI offset 80h, bit 1) to 1.
CCLK can be slowed down rather than stopped by CCLKRUN. If CCLKRUN
is set, the CLKCTRLEN (CardBus socket 20h, bit 16) and CLKCTR (CardBus
socket 20h, bit 0) bits are both set to 1. The clock is slowed down to 1/16. In
this mode the PCI clock is not allowed to stop.
1.1.12.9 SMI
A PC card power change event can be reported to the system as SMI (IRQ2
or CSC). It can be controlled with the SMIROUTE, SMIST A TUS, and SMIENB
bits (system control register, PCI of fset 80h, bits 26, 25, and 24, respectively).
1.1.12.10 Socket Power Lock
System Features Selection
Socket power can be protected from software control in the D3
be done with the socket power lock bit (device control register, PCI of fset 92h,
bit 7).
1.1.12.11VCC Protection
The VCCPROT bit (system control register, PCI of fset 80h, bit 21) controls V
protection for 16-bit cards. This feature protects applying the wrong (higher)
VCC to the 16-bit card. If a 3.3-V-only card is inserted, then it protects against
applying 5 V to the card. Default is 0 (enabled).
1.1.12.12 ZV Port Control and Auto Detect Function
Internal zoomed video buffers can be controlled with the ZV autodetect
function. It can be turned on by setting the zoomed video autodetect bit
(multimedia control register, PCI offset 84h, bit 5) to 1. Autodetect priority
encoding bits (multimedia control register, PCI of fset 84h, bits 4–2) can control
the priority scheme.
state. It can
hot
CC
PCI445X Device
1-7
System Implementation
1.2System Implementation
This section describes signal connection for each interface, PCI bus, PC card
interface, I
and serial), miscellaneous signals, and the PHY -Link interface. It also explains
pullup/pulldown resistor requirements.
1.2.1Clamping Rails
2
C interface, P2C interface, ZV interface, interrupt interface (parallel
The PCI445X device has three clamping rails: V
and V
are not power supplies for PC cards. After a card is powered up, the
CCB
supply voltage to the card is fed back into the V
CCA
CCA
, V
(or V
CCB
, and V
) input to the
CCB
CCP
. V
CCA
controller. This provides the controller a clamping level for signals to the card.
Technically the power switch controlling V
card via this signal, but actually V
is not a signal via which the controller
CCA
is also supplying power to the
CCA
supplies power to the card.
The PCI445X device only drives out a maximum signal of 3.3 V due to the
3.3-V core. This is not a problem, as 3.3 V is still seen as a logic 1 to a 5-V
system.
V
CCA
and V
CCB
PC Card interface clamping rails. CD1, CD2, VS1, VS2, and STSCHG/RI
are not clamped, because these terminals should be able to signal without
.
V
V
CCA/VCCB
CCP
PCI bus interface clamping rail. It includes the MFUNC7/LOCK,
MFUNC7–MFUNC0, IRQSER, GRST, and P2C terminals. It excludes
INTA, INTB, INTC, and PME.
Note:
The PME/RI_OUT terminal uses an open drain (OD) buffer.
These terminals can be connected to the system PCI bus directly. GNT
and REQ are dedicated signals from the PCI bus arbitrator.
PERR and SERR are required signals. LOCK is an optional signal and
available in MFUNC1, MFUNC3, and MFUNC7.
If there is a pulldown on LA TCH, then the IDSEL will be routed to AD23, but
the consequence of this is that the system designer must use AD23 as
System Implementation
IDSEL, there is no alternative. If another AD line is to be used for IDSEL,
then the system designer must leave the pullup off LATCH and use
MFUNC7 to route IDSEL. Also, if AD23 is used, then the resistive coupling
should not be used.
Refer to the
Implementation Note: System Generation of IDSEL
in the
Local Bus Specification, Revision 2.2 (section 3.2.2.3.5). PCI Local Bus
Specification, Revision 2.2 (section 4.2.6, footnote 31)
recommends
resistive coupling. A 100-Ω resistor is recommended.
PRST (PCI reset) and G_RST (Global reset)
G_RST initializes all of the registers and state-machines of the PCI445X
device, and PRST does not. G_RST should be asserted during power-on
and rebooting. It puts the PCI445X device into the initialized state. PRST
does not initialize global-reset-only bits and, if PME is enabled, PME
context bits. Refer to Table A–1, Global Reset Only Cleared Bits, and
T able A–2, PME Context Bits
. PRST is connected to PCI RESET ; G_RST
requires a special signal in the motherboard. It will come from the chipset.
If the system does not support wake-up from D3
then PRST and
cold,
G_RST can be tied together. Note that G_RST and PRST are clamped to
V
CCP.
PCI
INTA, INTB, and INTC
When using one of the parallel PCI interrupt modes, INT A, INTB, and INTC
should be connected to the PCI interrupt lines. If the INTRTIE bit (system
control register, PCI of fset 80h, bit 29) is set, then both CardBus functions
(functions 0 and 1) will signal and report INT A
, and only INT A and INTC will
need to be routed. If the TIEALL bit (system control register, PCI offset
80h, bit 28) is set, then all functions (0, 1, and 2) will report INT A and INT A
will be the only interrupt required.
CLKRUN
This signal is optional. However, if saving power is a concern, this signal
should be implemented. Refer to the
Revision 1.1 (Section 2)
PME
.
PCI Mobile Design Guide
This signal is required for the ACPI systems. In a notebook PC, this signal
is usually connected to the south bridge (ex., PIIX4) or embedded
controller (EC). The PME
terminal uses an open-drain type buffer.
Note: Pullup Resistor Requirements
A pullup resistor is required for each of the following terminals: IRDY , TRDY,
FRAME, STOP , DEVSEL, PERR, SERR, LOCK, PRST , G_RST , INT A, INTB,
INTC, CLKRUN, and PME.
PCI445X Device
1-9
System Implementation
1.2.3PC Card Interface
The PC Card interface has two modes: the 16-bit interface mode and the
CardBus 32-bit interface mode.
Damping resistor on CCLK terminal
CD line filtering
Socket power supply
A series-damping resistor is recommended on the CCLK signal. The
damping resistor is system dependent. If line impedance is in the 60–90-Ω
range, a 47-Ω resistor is recommended (see
Revision 7
).
PC Card Standard,
PCI445X device has the advanced CDx line filtering circuit. It provides
90 µs of noise immunity. A 270-pF filtering capacitor is still recommended
for each of the power supply terminals: VCC, V
CCS
, and V
CCP
.
Socket power is supplied through TPS22X6 power switches. The
PCI445X device requires V
CCA
and V
for the protection of the other
CCB
device(s) on the bus.
1.2.42-Wire (I2C) Interface for EEPROM
The PCI445X device can load configuration registers from EEPROM after
G_RST
assertion. The SDA and SCL lines require pullup resistors to enable
this function. Depending on the EEPROM requirements, the SDA and SCL
lines must be pulled up to 3.3 V or 5 V.
Figure 1–3.EEPROM 2-Wire Interface
EEPROM
EEPROM slave address should be 101 0000b.
SDA
SCL
PCI445X
TPS22X6
1-10
System Implementation
Table 1–1.Registers and Bits Loadable Through Serial EEPROM
Register OffsetRegisterBits Loaded From
EEPROM
The following are configuration registers for the OHCI function (function 2)
PCI register (2Ch)PCI subsystem ID15–0
PCI register (2Dh)PCI vendor ID15–0
PCI register (3Eh)PCI maximum latency, minimum grant1 1–8, 3–0
PCI register (F0h)PCI miscellaneous configuration15, 13, 10, 3–0
PCI register (F4h)Link enhancements control7, 2, 1
OHCI register (24h)1394 global unique ID Hi31–0
OHCI register (28h)1394 global unique ID Lo31–0
The following are configuration registers for PC Card functions (functions 0 and 1)
PCI register (40h)Subsystem vendor ID15–0
PCI register (42h)Subsystem ID15–0
PCI register (80h)System control31–24, 22–14, 6–3, 1, 0
PCI register (86h)General control3–0
PCI register (89h)General-purpose event enable7, 6, 3–0
PCI register (8Bh)General-purpose output3–0
PCI register (8Ch)Multifunction routing30–28, 26–24, 22–20,
0C0xXX;XXXXXXXX1394 GUIDLo (lsbyte)** GUIDLo byte 1 auto
incremented from ;serial.dat
0D0xXX;XXXXXXXX1394 GUIDLo (msbyte)** GUIDLo byte 2 auto
incremented from ;serial.dat
0E0xXX;XXXXXXXX1394 GUIDLo (msbyte)** GUIDLo byte 3 auto
incremented from ;serial.dat
0F0xXX;XXXXXXXX ROM CRC (Calculated by EELynx)
100x10;00010000Link_Enh Byte 1
110x00;00000000 PCI Misc Byte 0
120x24;00100100 PCI Misc Byte 1
130xFF;11111111 this area reserved
190xFF;11111111
1A0xFF;11111111
1B0xFF;11111111
1C0xFF;11111111
1-12
System Implementation
1D0xFF;11111111
1E0xFF;11111111
1F0xFF;11111111
200x00;00000000 Flag Byte (if 0xFF do not load Function 0
and 1)
210x12;00010010 SubSys Byte 3 ** Insert your SSVID MSB
220x34;00110100 SubSys Byte 2 ** Insert your SSVID LSB
230x56;01010110 SubSys Byte 1 ** Insert your SSID MSB
240x78;01111000 SubSys Byte 0 ** Insert your SSID LSB
250x60;01100000 SysCtrl Byte 0
260xB0;10110000 SysCtrl Byte 1
270x44;01000100 SysCtrl Byte 2
280x08;00001000 SysCtrl Byte 3
290x00;00000000 General Control
2A0x00;00000000 GP Event Enable
2B0x00;00000000 GP Output
2C0x22;00100010 MF Route Byte 0
2D0x22;00100010 MF Route Byte 1
2E0x22;00100010 MF Route Byte 2
2F0x04;00000100 MF Route Byte 3
300x02;00000010 Card Control
310x66;01100110 Device Control
320x61;01100001 Diagnostic
330x00;00000000 PMC Byte 1
340x82;10000010 ExCA ID and Rev
PCI445X Device
1-13
System Implementation
1.3.1P2C Interface for TPS22X6 Power Switch
The interface between the PCI445X device and TPS22X6 power switch is
serialized to reduce the number of signal lines. The P
three lines to control the switch. As a PCI445X default, the CLOCK signal is
selected from an external source. It is usually provided from RTC, 32.768 kHz.
The PCI445X device can also generate this clock from an internal ring
oscillator. The typical frequency of the internal ring oscillator is 16 kHz. If using
the internal clock source, then a pulldown resistor is required on the CLOCK
terminal. If arranging for D3 wake implementation, then connect the power
switch RESET
terminal to GRST.
Figure 1–4.TPS22X6 Power Switch Interface
V
CCA
PCI445X
V
CCB
CLOCK
DATA
LATCH
TPS22X6
V
V
V
V
PPA
CCA
PPB
CCB
2
C interface requires only
SLOT
A
SLOT
B
1.3.2Zoomed Video (ZV) Interface
The PCI445X device has an internally buffered and selectable ZV interface.
It supports three ZV sources, two from PC Cards and one from an external
source. An auto ZV detect function provides software independent ZV
switching. The auto ZV detect function senses the pixel clocks, arbitrates three
inputs, and selects one of them according to priority bits.
Figure 1–5.Example of a ZV Interface
ZVSTATZVPCLK
SLOT
A
23
Pulldown on
CLOCK
3rd ZV
Source
Buffer
19
Graphic
Controller
1-14
SLOT
B
23
PCI445X
4
Audio
Codec
Stereo
Sound
Controller
If the third ZV source is not implemented, ZVPCLK and ZVSTAT are not
required. To support ZV audio, an audio codec device is required for L and R
sound decoding.
1.3.3Interrupt Signaling Interface
Serialized Interrupt Interface
The serialized interrupt (ISA and PCI) interface is a single-line interface,
IRQSER. A pullup resistor is required on this terminal. The signal is
synchronous to PCLK, so PCLK is a required signal. Please remember
that SUSPEND gates PCLK internally . Usually this signal is connected to
the south bridge (ex., PIIX4). The IRQSER signal is sharable with other
devices.
Parallel PCI Interrupt
See Section 1.2.2, PCI Bus Interface.
1.3.4Miscellaneous Signals
1.3.4.1SUSPEND
System Implementation
The SUSPEND signal gates the PRST and G_RST signals from the PCI445X
device. SUSPEND also gates PCLK inside the PCI445X device in order to
minimize power consumption. Gating PCLK makes the IRQSER state
machine stop until SUSPEND is deasserted. Two requirements for
implementing suspend mode are that the PCI bus must not be parked on the
PCI445X device and IRQSER signaling is not proceeding when SUSPEND
asserted.
1.3.4.2RI_OUT and PME
RI_OUT can be programmed on the RI_OUT/PME or MFUNC7 terminal. PME
can be programmed only on the RI_OUT/PME terminal. To support both
RI_OUT and PME in a system, the RI_OUT/PME terminal must be
programmed as PME
(ex., PIIX4) or an embedded controller (EC). Buffers of the RI_OUT/PME type
are open-drain; therefore, a pullup resistor is required on this terminal.
1.3.4.3SPKROUT
SPKROUT is a dedicated terminal and it is usually mixed to PC sound, and
connected to a sound device.
1.3.4.4Activity LEDs
Activity LEDs can be programmed on MFUNC terminals. These signals are
active-high and driven for 64 ms duration.
is
. These signals are usually connected to the south bridge
1.3.4.5Distributed DMA (DDMA)
The PCI445X device supports both PC/PCI (centralized) DMA and a
distributed DMA slave engine for 16-bit PC Card DMA support.
PCI445X Device
1-15
System Implementation
Figure 1–6.Distributed DMA Signal Connection
PCREQ
PCI445X
PCGNT
1.3.5Requirement of Pullup/Pulldown Resistors
Note:
The PCI445X device has integrated pullup resistors and does not require
external pullups.
The pullup/pulldown on MFUNC depends on how it is implemented. Some
signals may require pullups, others pulldowns, and for a GPI or GPO only the
system designer would know how that line should be pulled.
Table 1–4.Miscellaneous Terminals Pullup Resistor List
PCI SignalRequired SituationPullup/Pulldown
MFUNC7–MFUNC4 N/C or used as outputV
MFUNC3–MFUNC0
(GPIO3–GPIO0)
MFUNC7(LOCK)N/C or used as outputV
CLOCKInternal OSC is selectedGND
LATCHIf MFUNC7 is used for IDSELGND
IRQSERV
RI_OUT/PMESystem dependent
SUSPENDSystem dependent
Note: Removing clamping voltage makes all the clamped signals low.
N/C or used as outputV
V oltage
or GND
CCP
or GND
CCP
CCP
CCP
PCI445X Device
1-17
System Implementation
Table 1–5.Required Pullup/Pulldown Resistors
SignalResistorRecommended
Value (Ω)
LPSPulldown (Default)1.0 kRequired
Note:All pullup/pulldown resistor value recommendations are provided as guidelines only. The best value for an individual
design varies depending upon board characteristics, standard design rules and practices, etc.
Condition
1-18
1.4BIOS Considerations
1.4.1Initialization
This section explains which registers require initialization, but does not
discuss detailed information about the registers themselves. Refer to the
corresponding specifications.
Set to 0007h (enables bus master control, memory space control, and I/O
space control)
Cache line size register (PCI offset 0Ch: 8-bit)
Set to 08h (It is dependent on host-to-PCI bridge specification). It enables
memory read line and memory read multiple command.
System Implementation
Latency timer (PCI offset 0Dh: 8-bit)
This register should reflect each PC Card requirement, but Windows does
not do so. Therefore, system imlementers should determine the value. A
detailed description of this register is in the
Specification
CardBus socket registers/ExCA base address (PCI offset 10h: 32-bit)
Setup of this register is not required because the CardBus bus is a
single-device bus, and the PCI445X device does not deassert CGNT until
a transaction is finished. (It does not mean that the PCI445X device
continues the transaction. The PCI445X device would terminate and
disconnect or abort the transaction as required).
Memory and I/O windows (PCI offset 1Ch – 3Fh)
All memory and I/O windows should be closed (set to base > limit).
Interrupt line register (PCI offset 3Ch: 8-bit)
This register is set to FFh (default).
Subsystem vendor ID and subsystem ID registers (PCI offsets 40h
and 42h: 16-bit/16-bit)
These registers can be set through EEPROM or BIOS. These registers
are read-only as default. Before writing to the registers, the SUBSYSRW
bit (system control register, PCI of fset 80h, bit 5) should be set to 1. After
setting up the registers, the SUBSYSRW bit should be set 0 to protect
PCI445X Device
1-19
System Implementation
against unexpected overwriting. The values are system and vendor
dependent.
PC Card 16-bit I/F legacy mode base address register (PCI offset 44h:
32-bit)
Set to 0000 03E1h (16-bit mode) and set to 0000 0001 (CardBus mode) in
response to a disable call.
Power management capabilities register (PCI offset A2h: 16-bit)
If the system does not support V
Power management control/status register (PCI offset A4h: 16-bit)
Clear bit 15 by writing a 1. This should be done after all the other
initialization for the PCI445X device is finished. Make sure that the
PCI445X device is in the D0 state, especially after reboot.
1.4.1.2PCI TI Proprietary Registers Initialization
The registers listed below should be set up according to system requirements.
Refer to Section 1.1.12.
System control register (PCI offset 80h: 32-bit)
Multimedia control register (PCI offset 84h: 8-bit)
GPIO3–GPIO0 control registers (PCI offset 88h – 8Bh: 8-bit)
Multifunction routing register (PCI offset 8Ch: 32-bit)
Card control register (PCI offset 91h: 8-bit)
Device control register (PCI offset 92h: 8-bit)
Diagnostic register (PCI offset 93h: 8-bit)
Supporting sleeping states, such as SUSPEND, STANDBY, and
HIBERNATION are important for a notebook PC environment. The following
describes the sleeping state in APM systems:
1) SUSPEND
Reset signals G_RST and PRST are gated while SUSPEND is asserted.
Power consumption of the PCI445X device is low if SUSPEND
1-20
is asserted.
2) Register save/restore
Register content is not preserved in the sleeping state (it depends on the
system implementation). Therefore, BIOS should restore the register
content. Under Windows98, most of the register content is saved and
restored by the pci.vxd and cbss.vxd.
3) Troubleshooting tips for sleep/resume issues
Symptoms of sleep/resume issues are:
System hung up during resume
PC Card does not work after resume
PC Card is not recognized after resume
The probable reason for these problems is that the register content is not
preserved correctly . Checking the register content before taking the system to
the sleep mode and after resuming from the sleep mode may shed some light.
If some of the register settings are not the same after resuming from the sleep
mode, then the BIOS most likely did not restore those values.
1.4.3Docking System Consideration
System Implementation
Subsystem IDs can be assigned as long as the SUBSYSRW bit (system
control register, PCI of fset 80h, bit 5) is set. It is better to do this from EEPROM
as no driver will be running to set the SSID up after a hot-dock/warm-dock.
2
Therefore, the IDs should be loaded through the I
C interface using an
EEPROM.
PCI445X Device
1-21
Important Information
1.5Important Information
This section clarifies important system implementation.
1.5.1G_RST Clamping Rail
G_RST is clamped to V
Figure 1–7.
G_RST and V
Relationship
CCP
V
CCP
G_RST
All other signals with clamping rails behave the same way.
1.5.2PME/RI_OUT Bit Definition
If PME is selected, only PME is signaled on the PME/RI_OUT terminal. If
RI_OUT
is selected, only RI_OUT is signaled. The PCI445X device can signal
PME and RI_OUT as completely separated signals. In this case RI_OUT
should be assigned on the MFUNC terminal.
1.5.3Serialized IRQ Data Stream
PCI clock is needed for operation of the PCI445X serialized IRQ
state-machine. During SUSPEND assertion, the PCI445X device stops the
IRQSER stream. Before asserting SUSPEND, IRQSER must be stopped.
, so removing V
CCP
V
CCP
removed
causes assertion of G_RST.
CCP
V
= 0
CCP
G_RST
1.5.4Socket Power Control
An internal or external CLOCK source is needed for the socket power control
through the P2C interface. The internal ring oscillator is on while the core V
is applied to the PCI445X device. External CLOCK source is dependent on the
system.
1.5.5External CLOCK Frequency for P2C Interface
If an external P2C CLOCK is used, then it will affect:
Advanced CD line noise filtering
VS test speed
TPS22X6 power control interface speed
Use of the internal ring oscillator is recommended. Recommended external
CLOCK source is the 32.768-kHz real-time clock (RTC).
1-22
CC
Global Reset Only Bits/PME Context Bits
Appendix A
Global Reset Only Bits, PME Context Bits
TopicPage
A.1 Global Reset Only Bits/PME Context BitsA-2
Global Reset Only Bits, PME Context Bits
A-1
Global Reset Only Bits/PME Context Bits
A.1 Global Reset Only Bits/PME Context Bits
Table A–1.Global Reset Only Cleared Bits
Register NameSpaceOffsetBit
Subsystem IDsPCI40h31–0
PC card 16-bit legacy mode base addressPCI44h31–1
System controlPCI80h31–29, 27–24, 22–14, 6–3,
1–0
Multimedia control
General status
GPIO0 control
GPIO1 control
GPIO2 control
GPIO3 control
MFUNC routing
Retry status
Card control
Device control
Diagnostic
Socket DMA register 0
Socket DMA register 1
GPE control/status
Note: The following link registers are reset by global reset only.
PCI subsystem identification register—PCI offset 2Ch
MIN_GNT and MAX_LAT register—PCI offset 3Eh
PCI OHCI control register—PCI offset 40h
Power management control and status register—PCI offset 48h
PCI miscellaneous and configuration register—PCI offset F0h
Link enhancement control register—PCI offset F4h
However, there is no support in the OS for the PME-type wake events of the
1394 peripherals at this time.
Table A–2.PME Context Bits
Register NameSpaceOffsetBit
Bridge controlPCI3Eh6
Power management capabilitiesPCIA2h15
Power management control/statusPCIA4h15, 8
ExCA power controlExCA802h, 842h 4, 3, 1, 0
ExCA interrupt and general controlExCA803h/843h6
ExCA card status changeExCA804h/844h3, 2, 1, 0
ExCA card status change interruptExCA805h/845h3, 2, 1, 0
CardBus socket eventCardBus 00h3, 2, 1, 0
CardBus socket maskCardBus 04h3, 2, 1, 0
CardBus socket statusCardBus 10h6, 5, 4, 2, 1, 0
Global reset only bits are cleared (to default value) only when G_RST is
asserted.
Global Reset Only Bits/PME Context Bits
PME context bits are not cleared (to default value) by PRST if the PME_EN
bit is set to 1.
Both G_RST and PRST can be gated by asserting the SUSPEND signal.
Global Reset Only Bits, PME Context Bits
A-3
A-4
Appendix B
PME and RI Behavior
This appendix clarifies PME and RI signal behavior. These signals are
important to support the wake-up event from a PC Card (CardBus and 16-bit
cards.)
T opicPage
B.1 PME and RI BehaviorB-2
PME and RI Behavior
B-1
B.1 PME and RI Behavior
Table B–1.CardBus CTSCHG and Wake-Up Signals Truth Table
I/OStandard input/output
IStandard input only
OStandard output only
ODOpen drain
PPower, GND, or clamp rail
STSSustained 3-state bidirectional. An active-low signal must be driven high for one cycle
before deasserting.
TS3-state bidirectional
TSO3-state output only
PCI445X Buffer T ypes
C-7
C-8
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