The µPD98402A is one of the ATM-LAN LSIs and incorporates the TC sublayer function in the SONET/SDH-
µ
based physical layer of the ATM protocol. The main functions of the
mapping ATM cells received from the ATM layer onto the payload block of the SONET STS-3c/SDH STM-1 frame
and sending them to PMD (Physical Media Dependent) in the physical layer, and a receive function for separating
the overhead block and ATM cells from the data string received from the PMD sublayer and sending the ATM cells
to the ATM layer.
µ
Futhermore, the
PD98402A is compliant with the ATM Forum UNI Recommendations.
PD98402A include a transmit function for
FEATURES
• Provision of TC sublayer function of ATM protocol physical layer
• Support of SONET STS-3c frame/SDH STM-1 frame format
• Provision of stop mode for cell scramble/descramble and frame scramble/descramble
• Disposal/transitory selection of unassigned cells is possible.
• Compliant with UTOPIA interface
• Incorporation of internal loopback function at PMD and ATM layer turns
• PMD interface
155.52 Mbps serial interface
19.44 MHz parallel interface
• Provided with registers for writing/reading overhead information
SOH (section overhead): C1 (1st to 3rd) bytes, F1 byte
LOH (line overhead): K2 byte
POH (pass overhead): F2 byte, C2 byte
• CMOS process
• +5 V single power supply
Document No. S10835EJ1V0DS00 (1st edition)
Date Published December 1995 P
Printed in Japan
The information in this document is subject to change without notice.
• Incorporation of OAM (Operation And Maintenance) function
µ
PD98402A
Transmitting side
Transmission of various alarms
• Transmission by generation of sources
Line RDI (FERF), Path RDI (FERF)
Line FEBE, Path FEBE
• Transmission by command instruction
Line AIS, Path AIS
Line FEBE, Path FEBE
Receiving side
• Detection of alarms and error signals
LOS (Loss Of Signal)
OOF (Out Of Frame)
LOF (Loss Of Frame)
LOP (Loss Of Pointer)
LOC (Loss Of Cell delineation)
Line RDI (FERF), Path RDI (FERF)
Line AIS, Path AIS
• Detection and display of quality deterioration sources
B1 error, B2 error, B3 error, Line FEBE,
Path FEBE
• Incorporation of counter for counting number of performance
A0-A5: Address Bus
ACK: Read/write Cycle Receive Acknowledge
CE: Chip Enable
D0–D7: Data Bus
EMPTY: Output Buffer Empty
FULL: Buffer Full
GND: Ground
LOS: Loss of Signal
OE: Output Enable
OOF: Out of Frame
PHINT: Physical Interrupt
PSEL: PMD I/F Select
RAL: Receive Alarm
RCIC: Receive Clock Input Complement
RCIT: Receive Clock Input True
RCL: Internal Receive System Clock
RCLK: Receive Data Transferring Clock from the ATM Layer Device
RDIC: Receive Data Input Complement
RDIT: Receive Data Input True
RDO0-RDO7 : Receive Data Output
RENBL: Receive Data Enable
RESET: System Reset
RPC: Receive Parallel Data Clock
RPD0-RPD7 : Receive Parallel Data
RSOC: Receive Start Address of ATM Cell
R/W: Read/write Control
RxFP: Receive Frame Pulse
TAL: Transmit Alarm
TCK: Test Clock
TCL: Internal Transmit System Clock
TCLK: Transmit Data Transferring Clock from the ATM Layer Device
TCOC: Transmit Clock Output Complement
TCOT: Transmit Clock Output True
TDI0-TDI7: Transmit Data Input from the ATM Layer
TDO: Test Data Output
TDOC: Transmit Data Output Complement
TDOT: Transmit Data Output True
TENBL: Transmit Data Enable
TFC: Transmit Reference Clock
TFKC: Transmit Reference Clock Complement
TFKT: Transmit Reference Clock True
TFSS: Transmit Frame Set Signal
TJI: Test JTAG Data Input
TPC: Transmit Parallel Data Clock
TPD0-TPD7 : Transmit Parallel Data
TMS: Test Mode Select
TRST: Test Reset
TSOC: Transmit Start Address of ATM Cell
TxFP: Transmit Frame Pulse
DD: Supply Voltage
V
µ
PD98402A
7
Page 8
µ
PD98402A
1. PIN FUNCTIONS
• PMD Interface
SymbolPin No.I/OI/O LevelFunction
RDIC66IPseudo ECLThese pins are used to input receive serial data when serial
Complement (–)interface mode is used (PSEL pin input = low level). Ground
RDIT65IPseudo ECL
True (+)
RCIC63IPseudo ECLThese pins are used to input the receive system clock when
Complement (–)serial interface mode is used (PSEL pin input = low level).
RCIT62IPseudo ECL
True (+)
TDOC59OPseudo ECLThese pins are used to output transmit serial data when serial
Complement (–)interface mode is used (PSEL pin input = low level). They are
TDOT58OPseudo ECL
True (+)
TCOC54OPseudo ECLThese pins are used to output transmit clocks when serial
Complement (–)interface mode is used (PSEL pin input = low level). Transmit
TCOT53OPseudo ECL
True (+)
TFKC50IPseudo ECLThese pins are used to input transmit system clocks when
Complement (–)serial interface mode is used (PSEL pin input = low level).
TFKT49IPseudo ECL
True (+)
them when Parallel interface mode is used.
Clocks are input in synchronization with receive data. Ground
them when parallel interface mode is used.
open-drain pins. Terminate them with VDD –2 V via a 50 Ω
resistor. To be undefined after reset.
clocks to be input to the TFKC/TFKT pins are output passing
through internal gates. They are open-drain pins. Terminate
them with VDD –2 via a 50 Ω resistor. To be undefined after
reset.
Transmit data output from the TDOC/TDOT pins is output in
synchronization with clocks that are input to these pins.
Ground them when parallel interface mode is used.
RPD0-RPD777-73, 71-69ITTLThese pins are used to input receive parallel data when
parallel interface mode is used (PSEL pin input = high level).
Leave them open when serial interface mode is used.
RPC67ITTLThis pin is used to input the receive system clock when
parallel interface mode is used (PSEL pin input = high level).
Input clocks synchronous with the receive data. Leave it open
when serial interface mode is used.
TPD0-TPD735-39, 43-45OCMOSThese pins are used to output transmit parallel data when
parallel interface mode is used (PSEL pin input = high level).
Leave them open when serial interface mode is used.
TPC46OCMOSThis pin is used to output transmit clocks when parallel
interface mode is used (PSEL pin input = high level). Transmit
clocks to be input to the TFC pin are output passing through
internal gates. Leave it open when serial interface mode is
used.
TFC48ITTLThis pins is used to input transmit system clocks when parallel
interface mode is used (PSEL pin input = high level). Transmit
data output from pins TPD0 to TPD7 are output in
synchronization with the clocks input to this pin. Leave it open
when serial interface mode is used.
PSEL78ICMOSThis pin is used to select the mode for PMD interface serial/
parallel interface.
Low level: Serial interface mode
High level: Parallel interface mode
RDO0-RDO7151-158OCMOSConnected to 8-bit data bus to output the receive data to the
ATM Layer device. Output is synchronized with the RCLK
rising up. To be undefined after reset.
RCLK148ITTLInput pin of the receive data transferring clock from the ATM
Layer device.
RSOC145OCMOSReceive cell start address signal. To the ATM Layer device,
this signal indicates the start address byte of the receive ATM
cell. To be undefined after reset.
RENBL146ITTLReceive enable signal. Input pin of the signal indicating that
the ATM layer device can receive data.
EMPTY144OCMOSOutput buffer empty signal. This signal indicates that there is
no data to be transferred to the receive FIFO of the
µ
PD98402A. To be inactive after reset.
TDI0-TDI7129-136ITTL8-bit data bus to input the transmit data from the ATM Layer
device. Reading a data on the bus is synchronized with the
TCLK rising-up.
TCLK139ITTLInput pin of the transmit data transferring clock from the ATM
layer device.
TSOC142ITTLTransmit cell start address signal. Input pin of the signal
indicating the start byte of the transmit ATM cell input from the
ATM Layer device to the µPD98402A.
TENBL141ITTLTransmit enable signal. This signal indicates that the ATM
Layer device is transmitting the valid data to the TDI0-TDI7.
FULL143OCMOSInput buffer full signal. When 4 bytes remain as the
acceptable bytes of transmit FIFO at last, this signal changes
to active. To be inactive after reset.
9
Page 10
µ
PD98402A
• Management Interface
SymbolPin No.I/OI/O LevelFunction
D0-D7104-106I/OCMOS8-bit data bus for data transfer between the control processor
108-112and the internal register of the µPD98402A.
A0-A5114-119ITTLAddress bus. Used for setting the internal register address of
the µPD98402A.
R/W123ITTLRead/write control signal.
Low level: Write cycle
High level: Read cycle
CE126ITTLChip enable signal.
At low level, internal register access is to be enable.
ACK124OCMOSRead/write cycle receive acknowledge or ready signal.
After reset, this signal indicates inactive level.
PHINT127OCMOSSignal which indicates the interrupt cause occurrence to the
processor.
After reset, this signal indicates inactive level.
OE125ITTLOutput enable. When this signal is set to low level, the
µ
PD98402A outputs data to the control bus. Even if the CE
signal is inactive, when this signal is at low level, the
µ
PD98402A drives the control bus.
• OAM Interface
SymbolPin No.I/OI/O LevelFunction
LOS9OCMOSLoss of signal detection. Output high level when receive serial
data input is "0" for 50 µs continuously or optical input stop
signal (RAL) is input. When 2 consecutive frames of valid
synchronous pattern is detected, or when input of the optical
input stop signal is released, low level is output. To be
inactive after reset.
OOF10OCMOSOut of frame detection. When 4 consecutive frames of wrong
synchronous pattern are detected, high level is output. When
2 consecutive frames of normal synchronous pattern are
detected, low level is output. To be inactive after reset.
RAL7ITTLReceive alarm. Inputs receiver-side optical input stop signal
by the optical module.
Low level: Normal
High level: Optical input stopped.
TAL8ITTLTransmit alarm. Inputs transmit-side optical output stop signal
output by the optical module.
Low level: Normal
High level: Optical output stopped.
10
Page 11
µ
PD98402A
• Control
SymbolPin No.I/OI/O LevelFunction
TFSS29ITTLThis is the transmit frame setting signal input pin.
It allows synchronization timing of transmit frame output to be
set. The µPD98402A samples this input signal by the internal
transmit system clock (TCL).
Initial output of the transmit frame is restarted 9 clocks into
TCL clock cycle after a high level is latched at TCL rise.
RESET103ITTLThis is the system reset signal input pin.
It initializes the µPD98402A. It is necessary to input a reset
signal with a pulse width of 2 cycles or more of the clock that
has the longest cycle among the following clocks input to the
TFC, RPC clock cycles
Immediately after a reset, no read/write is possible to registers
during 5 clocks of the TCL clock (19.44 MHz).
TCL32OCMOSThis pin is used to output an internal transmit system clock.
The µPD98402A outputs as the internal transmit system clock,
the TFKT/TFKC input clock (155.52 MHz) scaled by 8 in serial
interface mode, and the TFC input clock (19.44 MHz) in
parallel interface mode.
RCL85OCMOSThis pin is used to output an internal receive system clock.
The µPD98402A outputs as the internal receive system clock,
the RCIC/RCIT input clock (155.52 MHz) scaled by 8 in serial
interface mode, and the RFC input clock (19.44 MHz) in
parallel interface mode.
TxFP31OCMOSThis is a frame pulse signal on the transmitting side. It
outputs pulses synchronous with the transmit frame start. To
be inactive after reset.
RxFP30OCMOSThis is a frame pulse signal on the receiving side. It outputs
pulses synchronous with the receive frame start. To be
inactive after reset.
• JTAG boundary scan pins (This function can be supported at the customer’s request.)
ParametersSymbolConditionsRatingsUnit
Supply voltageVDD–0.5 to +6.5V
Input/output voltageVI/VO–0.5 to VDD +0.5V
Operating ambient temperatureTA0 to +70°C
Storage temperatureTstg–65 to +150°C
Caution Exposure to absolute maximum ratings for extended periods may affect device reliability;
exceeding the ratings could cause permanent damage. The parameters apply independently.
The device should be operated within the limits specified under DC and AC characteristics.
DC Characteristics (VDD = 5 V ±0.25 V, TA = 0 to +70 °C)
ParametersSymbolConditionsMIN.TYP.MAX.Unit
Note4
Note4
Note1
Note2
—10
—10
0.7 VDD—
—0.4
Off-state output currentIOZVI = VDD or GND
ILI1VI = VDD or GND
Input leak current
ILI2Note 3—10
VOH1IOH = –0.5 mA
High level output voltageV
VOH2Note 5VDD–0.9VDD–0.4
VOL1IOL = 6.0 mA
Low level output voltageV
VOL2Note 5VDD–2.0VDD–1.7
Supply currentIDDNormal operation—300mA
Notes 1.3-state data bus
2. TTL input pin
3. Pseudo ECL input pin
4. CMOS output pin
5. Pseudo ECL output pin
µ
A
µ
A
14
Page 15
µ
PD98402A
AC Characteristics
(1) Management Interface
Internal Register Read/Write
ParametersSymbolConditionsMIN.TYP.MAX.Unit
A0-A5 setup time (to CE↓)tSCC15
R/W setup time (to CE↓)tSCC25
A0-A5 hold time (to CE↓)tHCC13
R/W hold time (to CE↓)tHCC23
CE↓→ACK↓ delay time (read)tDCNARLoad capacitor 15 pF3 ×4.5 ×
At parallel data inputtCYPPRtCYPPR
Load capacitor 15 pF3 ×4.5 ×
At serial data input(tCYPSR× 8)(tCYPSR× 8)
CE↓→ACK↓ delay time (write)tDCNAWLoad capacitor 15 pF2 ×3.5 ×
At parallel data inputtCYPPRtCYPPR
Load capacitor 15 pF2 ×3.5 ×
At parallel data inputtCYPPRtCYPPR
Load capacitor 15 pF1 ×2.5 ×
At serial data input(tCYPSR× 8)(tCYPSR× 8)
CE↓→ data output delay timetDCDLoad capacitor 15 pF2 ×3.5 ×
At parallel data inputtCYPPRtCYPPR
Load capacitor 15 pF2 ×3.5 ×
At serial data input(tCYPSR× 8)(tCYPSR× 8)
OE↓→ data output delay timetDODLoad capacitor 15 pF—9.4ns
OE↑→ data floating output delay timetFODLoad capacitor 15 pF—10ns
D0-D7 setup time (to CE↓)tSDC5—ns
D0-D7 hold time (to CE↓)tHCD3—ns
CE low-level widthtCEBWAt parallel data input3.5 ×—
tCYPPR
At serial data input3.5 ×—
(tCYPSR× 8)
OE low-level widthtOEBWAt parallel data input2.5 ×—
tCYPPR
At serial data input2.5 ×—
(tCYPSR× 8)
ns
ns
ns
ns
ns
ns
ns
ns
Remarks 1. For tCYPPR, refer to (6) PMD parallel interface timing.
ParametersSymbolConditionsMIN.TYP.MAX.Unit
TCLK cycle timetCYST30125ns
TCLK high level widthtSTH12110ns
TCLK low level widthtSTL12110ns
TCLK↑→FULL↓ delay timetFDload capacitor = 15 pF517ns
TDI0-TDI7 setup time (to TCLK↑)tSTDK15—ns
TSOC setup time (to TCLK↑)tSTDK212—ns
TENBL setup time (to TCLK↑)tSTDK35—ns
TDI0-TDI7 hold time (to TCLK↑)tHKTD13—ns
TSOC hold time (to TCLK↑)tHKTD23—ns
TENBL hold time (to TCLK↑)tHKTD23—ns
ParametersSymbolConditionsMIN.TYP.MAX.Unit
RCIT (RCIC) cycle timetCYPSR6.4—ns
TFKT (TFKC) cycle timetCYPST6.4—ns
Serial data setup timetSSDC1.0—ns
Serial data hold timetHSCD1.0—ns
Serial clock delay time (rising)tDFSCPLoad capacitor 15 pF—8ns
Serial clock delay time (falling)tDFSCNLoad capacitor 15 pF—8ns
Transmit serial data delay timetDSCDLoad capacitor 15 pF—3ns
PMD Serial Interface
Receive Side
t
CYPSR
Transmit Side
RCIC, RCIT
RDIC, RDIT
TFKC, TFKT
TCOC, TCOT
TDOC, TDOT
t
DFSCPtDFSCN
t
DSCD
t
SSDC
t
HSCD
t
CYPST
22
Page 23
3. PACKAGE DRAWING
160 PIN PLASTIC QFP (FINE PITCH) ( 24)
A
B
12081
121
80
µ
PD98402A
detail of lead end
160
1
41
40
F
GHIJ
M
P
N
NOTE
Each lead centerline is located within 0.10 mm (0.004 inch) of
its true position (T.P.) at maximum material condition.
C D
S
Q
K
M
L
ITEM MILLIMETERSINCHES
A26.0±0.21.024
B
24.0±0.2
C24.0±0.2
D26.0±0.21.024
F
2.25
G2.25
H0.220.009±0.002
I0.100.004
J0.5 (T.P.)0.020 (T.P.)
K1.0±0.20.039
L0.5±0.20.020
M0.170.007
N0.100.004
P2.70.106
Q0.125±0.075
R5°±5°5°±5°
S3.0 MAX.0.119 MAX.
R
+0.008
–0.009
0.945±0.008
0.945±0.008
+0.008
–0.009
0.089
0.089
+0.05
–0.04
+0.009
–0.008
+0.008
–0.009
+0.03
–0.07
S160GM-50-3ED, JED, KED-2
+0.001
–0.003
0.005±0.003
23
Page 24
µ
PD98402A
4. RECOMMENDED SOLDERING CONDITIONS
For the µPD98402A, soldering must be performed under the following conditions.
For details of recommended conditions for surface mounting, refer to information document “Semiconductor
Device Mounting Technology Manual” (IEI-1207).
For other soldering methods, please consult with NEC sales personnel.
Note This means the number of days after unpacking the dry pack. Storage conditions are 25 °C and 65 % RM
max.
Note
(after that, 125 °C pre-baking for 20 hours
24
Page 25
[MEMO]
µ
PD98402A
25
Page 26
µ
PD98402A
[MEMO]
The export of this product from Japan is prohibited without governmental license. To export or re-export this product from
a country other than Japan may also be prohibited without a license from that country. Please call an NEC sales
representative.
No part of this document may be copied or reproduced in any form or by any means without the prior written
consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in this
document.
NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual
property rights of third parties by or arising from use of a device described herein or any other liability arising
from use of such device. No license, either express, implied or otherwise, is granted under any patents,
copyrights or other intellectual property rights of NEC Corporation or others.
While NEC Corporation has been making continuous effort to enhance the reliability of its semiconductor devices,
the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to persons or
property arising from a defect in an NEC semiconductor device, customer must incorporate sufficient safety
measures in its design, such as redundancy, fire-containment, and anti-failure features.
NEC devices are classified into the following three quality grades:
“Standard“, “Special“, and “Specific“. The Specific quality grade applies only to devices developed based on
a customer designated “quality assurance program“ for a specific application. The recommended applications
of a device depend on its quality grade, as indicated below. Customers must check the quality grade of each
device before using it in a particular application.
Standard:Computers, office equipment, communications equipment, test and measurement equipment,
audio and visual equipment, home electronic appliances, machine tools, personal electronic
equipment and industrial robots
systems, anti-crime systems, safety equipment and medical equipment (not specifically designed
for life support)
Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems or medical equipment for life support, etc.
The quality grade of NEC devices in “Standard“ unless otherwise specified in NEC's Data Sheets or Data Books.
If customers intend to use NEC devices for applications other than those specified for Standard quality grade,
they should contact NEC Sales Representative in advance.
Anti-radioactive design is not implemented in this product.
26
M4 94.11
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