
PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
PM7345
TM
DH
S/
UNI-
S/UNI-PDH
SATURN USER-NETWORK INTERFACE FOR ATM PLESIOCHRONOUS
DIGITAL HIERARCHY DATACOM
DATA SHEET
ISSUE 6: JUNE 1998

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
PUBLIC REVISION HISTORY
Issue
No.
Issue
Date
Details of Change
6 June
1998
Data Sheet Reformatted — No
Change in Technical Content.
Generated R6 data sheet from
PMC-930818, R9

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
i
CONTENTS
1 FEATURES...............................................................................................1
2 APPLICATIONS........................................................................................4
3 REFERENCES.........................................................................................4
4 APPLICATION EXAMPLES......................................................................6
5 BLOCK DIAGRAM....................................................................................9
6 DESCRIPTION.......................................................................................12
7 PIN DIAGRAM........................................................................................15
8 PIN DESCRIPTION................................................................................17
9 FUNCTIONAL DESCRIPTION...............................................................41
9.1 DS3 FRAMER..............................................................................41
9.2 E3 FRAMER ................................................................................43
9.3 PMON PERFORMANCE MONITOR ACCUMULATOR................45
9.4 RBOC BIT-ORIENTED CODE DETECTOR.................................45
9.5 RFDL FACILITY DATA LINK RECEIVER.....................................46
9.6 SPLR PLCP LAYER RECEIVER .................................................47
9.7 ATMF ATM CELL DELINEATOR ..................................................47
9.8 RXCP RECEIVE CELL PROCESSOR ........................................49
9.9 RXFF RECEIVE FIFO..................................................................51
9.10 CPPM CELL AND PLCP PERFORMANCE MONITOR...............52
9.11 DS3 TRANSMITTER....................................................................52
9.12 E3 TRANSMITTER......................................................................53
9.13 XBOC BIT ORIENTED CODE GENERATOR ..............................55

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9.14 XFDL FACILITY DATA LINK TRANSMITTER...............................55
9.15 SPLT SMDS PLCP LAYER TRANSMITTER................................56
9.16 TXCP TRANSMIT CELL PROCESSOR ......................................57
9.17 TXFF TRANSMIT FIFO................................................................57
9.18 TTB TRAIL TRACE BUFFER.......................................................59
9.19 MICROPROCESSOR INTERFACE .............................................59
9.20 NORMAL MODE REGISTER MEMORY MAP.............................60
10 NORMAL MODE REGISTER DESCRIPTION........................................63
10.1 BASIC OPERATING MODES ....................................................215
11 TEST FEATURES DESCRIPTION .......................................................217
11.1 TEST MODE 0...........................................................................221
12 OPERATION.........................................................................................225
12.1 PLCP FRAME FORMATS..........................................................225
12.2 PLCP PATH OVERHEAD OCTET PROCESSING.....................227
12.3 G.832 E3 FRAME FORMAT.......................................................231
12.4 G.832 E3 PATH OVERHEAD OCTET PROCESSING...............231
12.5 S/UNI-PDH CELL DATA STRUCTURE ......................................233
12.6 USING THE PERFORMANCE MONITORING FEATURES.......234
12.7 USING THE INTERNAL DATA LINK TRANSMITTER ................235
12.8 USING THE INTERNAL DATA LINK RECEIVER .......................236
12.9 SILICON SYSTEMS 78P7200 IMPLEMENTATION...................238
13 FUNCTIONAL TIMING .........................................................................241
14 ABSOLUTE MAXIMUM RATINGS........................................................262

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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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15 D.C. CHARACTERISTICS ....................................................................263
16 MICROPROCESSOR INTERFACE TIMING CHARACTERISTICS......266
17 S/UNI-PDH TIMING CHARA CTERISTICS...........................................271
18 ORDERING AND THERMAL INFORMATION ......................................288
19 MECHANICAL INFORMATION .............................................................289
19.1 84 PIN PLASTIC LEADED CHIP CARRIER (Q SUFFIX):.........289
19.2 100 PIN PLASTIC QUAD FLAT PACK (R SUFFIX):...................290

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
iv
LIST OF REGISTERS
REGISTER 00H: S/UNI-PDH CONFIGURATION..............................................64
REGISTER 01H: S/UNI-PDH INTERRUPT ENABLE.......................................67
REGISTER 02H: S/UNI-PDH INTERRUPT STATUS........................................68
REGISTER 03H: S/UNI-PDH CONTROL.........................................................69
REGISTER 04H: S/UNI-PDH IDENTIFICATION AND MASTER RESET.........71
REGISTER 05H: S/UNI-PDH DATA LINK AND FERF CONTROL.....................72
REGISTER 06H: RBOC CONFIGURATION/INTERRUPT ENABLE .................75
REGISTER 07H: RBOC INTERRUPT STATUS.................................................76
REGISTER 08H: DS3 FRMR CONFIGURATION.............................................77
REGISTER 09H: DS3 FRMR INTERRUPT ENABLE (ACE=0) ........................79
REGISTER 09H: DS3 FRMR ADDITIONAL CONFIGURATION REGISTER
(ACE=1)..................................................................................................81
REGISTER 0AH: DS3 FRMR INTERRUPT STATUS........................................84
REGISTER 0BH: DS3 FRMR STATUS.............................................................86
REGISTER 0CH: RFDL CONFIGURATION ......................................................88
REGISTER 0DH: RFDL ENABLE/STATUS .......................................................89
REGISTER 0EH: RFDL STATUS.......................................................................90
REGISTER 0FH: RFDL RECEIVE DATA...........................................................92
REGISTER 10H: S/UNI-PDH CHANGE OF PMON PERFORMANCE METERS
................................................................................................................93
REGISTER 11H: PMON INTERRUPT ENABLE/STATUS ................................94
REGISTER 14H: PMON LINE CODE VIOLATION EVENT COUNT LSB.........95
REGISTER 15H: PMON LINE CODE VIOLATION EVENT COUNT MSB........96

PM7345 S/UNI-PDH
DATA SHEET
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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
v
REGISTER 16H: PMON FRAMING BIT ERROR EVENT COUNT LSB...........97
REGISTER 17H: PMON FRAMING BIT ERROR EVENT COUNT MSB..........98
REGISTER 18H: PMON SUMMED EXCESSIVE ZERO DETECT AND
INCOMING ERROR COUNT LSB..........................................................99
REGISTER 19H: PMON SUMMED EXCESSIVE ZERO DETECT AND
INCOMING ERROR COUNT MSB.......................................................100
REGISTER 1AH: PMON PARITY ERROR EVENT COUNT LSB...................101
REGISTER 1BH: PMON PARITY ERROR EVENT COUNT MSB..................102
REGISTER 1CH: PMON PATH PARITY ERROR EVENT COUNT LSB.........103
REGISTER 1DH: PMON PATH PARITY ERROR EVENT COUNT MSB........104
REGISTER 1EH: PMON FEBE EVENT COUNT LSB ....................................105
REGISTER 1FH: PMON FEBE EVENT COUNT MSB...................................106
REGISTER 20H: DS3 TRAN CONFIGURATION............................................107
REGISTER 21H: DS3 TRAN DIAGNOSTIC...................................................109
REGISTER 24H: XFDL CONFIGURATION.....................................................111
REGISTER 25H: XFDL INTERRUPT STATUS................................................113
REGISTER 26H: XFDL TRANSMIT DATA.......................................................114
REGISTER 27H: XBOC CODE.......................................................................115
REGISTER 28H: SPLR CONFIGURATION....................................................116
REGISTER 29H: SPLR INTERRUPT ENABLE..............................................118
REGISTER 2AH: SPLR INTERRUPT STATUS ..............................................119
REGISTER 2BH: SPLR STATUS....................................................................121
REGISTER 2CH: SPLT CONFIGURATION....................................................123
REGISTER 2DH: SPLT CONTROL................................................................126

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DATA SHEET
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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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REGISTER 2EH: SPLT DIAGNOSTICS AND G1 OCTET..............................128
REGISTER 2FH: SPLT F1 OCTET.................................................................130
REGISTER 30H: CPPM LOSS OF CLOCK METERS....................................131
REGISTER 31H: CPPM CHANGE OF CPPM PERFORMANCE METERS...132
REGISTER 32H: CPPM B1 ERROR COUNT LSB.........................................133
REGISTER 33H: CPPM B1 ERROR COUNT MSB........................................134
REGISTER 34H: CPPM FRAMING ERROR EVENT COUNT LSB................135
REGISTER 35H: CPPM FRAMING ERROR EVENT COUNT MSB................136
REGISTER 36H: CPPM FEBE COUNT LSB .................................................137
REGISTER 37H: CPPM FEBE COUNT MSB ................................................138
REGISTER 38H: CPPM HCS ERROR COUNT LSB .....................................139
REGISTER 39H: CPPM HCS ERROR COUNT MSB ....................................140
REGISTER 3AH: CPPM IDLE/UNASSIGNED CELL COUNT LSB................142
REGISTER 3BH: CPPM IDLE/UNASSIGNED CELL COUNT MSB...............143
REGISTER 3CH: CPPM RECEIVE CELL COUNT LSB.................................144
REGISTER 3DH: CPPM RECEIVE CELL COUNT MSB................................145
REGISTER 3EH: CPPM TRANSMIT CELL COUNT LSB..............................146
REGISTER 3FH: CPPM TRANSMIT CELL COUNT MSB..............................147
REGISTER 40H: RXCP CONTROL................................................................148
REGISTER 41H: RXCP FRAMING CONTROL...............................................150
REGISTER 42H: RXCP INTERRUPT ENABLE/STATUS ................................152
REGISTER 43H: RXCP IDLE/UNASSIGNED CELL PATTERN: H1 OCTET...154
REGISTER 44H: RXCP IDLE/UNASSIGNED CELL PATTERN: H2 OCTET...155

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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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REGISTER 45H: RXCP IDLE/UNASSIGNED CELL PATTERN: H3 OCTET...156
REGISTER 46H: RXCP IDLE/UNASSIGNED CELL PATTERN: H4 OCTET...157
REGISTER 47H: RXCP IDLE/UNASSIGNED CELL MASK: H1 OCTET ........158
REGISTER 48H: RXCP IDLE/UNASSIGNED CELL MASK: H2 OCTET ........159
REGISTER 49H: RXCP IDLE/UNASSIGNED CELL MASK: H3 OCTET ........160
REGISTER 4AH: RXCP IDLE/UNASSIGNED CELL MASK: H4 OCTET........161
REGISTER 4BH: RXCP USER-PROGRAMMABLE MATCH PATTERN: H1
OCTET .................................................................................................162
REGISTER 4CH: RXCP USER-PROGRAMMABLE MATCH PATTERN: H2
OCTET .................................................................................................163
REGISTER 4DH: RXCP USER-PROGRAMMABLE MATCH PATTERN: H3
OCTET .................................................................................................164
REGISTER 4EH: RXCP USER-PROGRAMMABLE MATCH PATTERN: H4
OCTET .................................................................................................165
REGISTER 4FH: RXCP USER-PROGRAMMABLE MATCH MASK: H1 OCTET
..............................................................................................................166
REGISTER 50H: RXCP USER-PROGRAMMABLE MATCH MASK: H2 OCTET
..............................................................................................................167
REGISTER 51H: RXCP USER-PROGRAMMABLE MATCH MASK 2: H3 OCTET
..............................................................................................................168
REGISTER 52H: RXCP USER-PROGRAMMABLE MATCH MASK 2: H4 OCTET
..............................................................................................................169
REGISTER 53H: RXCP HCS CONTROL/STATUS..........................................170
REGISTER 54H: RXCP LCD COUNT THRESHOLD......................................171
REGISTER 58H: TXCP CONTROL................................................................172
REGISTER 59H: TXCP INTERRUPT ENABLE/STATUS AND CONTROL.....174
REGISTER 5AH: TXCP IDLE/UNASSIGNED CELL PATTERN: H1 OCTET..176

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
viii
REGISTER 5BH: TXCP IDLE/UNASSIGNED CELL PATTERN: H2 OCTET..177
REGISTER 5CH: TXCP IDLE/UNASSIGNED CELL PATTERN: H3 OCTET..178
REGISTER 5DH: TXCP IDLE/UNASSIGNED CELL PATTERN: H4 OCTET..179
REGISTER 5EH: TXCP IDLE/UNASSIGNED CELL PATTERN: H5 OCTET..180
REGISTER 5FH: TXCP IDLE/UNASSIGNED CELL PAYLOAD......................181
REGISTER 60H: E3 FRMR FRAMING OPTIONS .........................................182
REGISTER 61H: E3 FRMR MAINTENANCE OPTIONS................................184
REGISTER 62H: E3 FRMR FRAMING INTERRUPT ENABLE......................186
REGISTER 63H: E3 FRMR FRAMING INTERRUPT INDICATION AND STATUS
..............................................................................................................188
REGISTER 64H: E3 FRMR MAINTENANCE EVENT INTERRUPT ENABLE190
REGISTER 65H: E3 FRMR MAINTENANCE EVENT INTERRUPT INDICATION
..............................................................................................................192
REGISTER 66H: E3 FRMR MAINTENANCE EVENT STATUS......................194
REGISTER 68H: E3 TRAN FRAMING OPTIONS...........................................196
REGISTER 69H: E3 TRAN STATUS AND DIAGNOSTIC OPTIONS...............198
REGISTER 6AH: E3 TRAN BIP-8 ERROR MASK ..........................................200
REGISTER 6BH: E3 TRAN MAINTENANCE AND ADAPTATION OPTIONS.201
REGISTER 6CH: TTB CONTROL...................................................................203
REGISTER 6DH: TTB TRAIL TRA CE IDENTIFIER STA TUS...........................205
REGISTER 6EH: TTB INDIRECT ADDRESS..................................................207
REGISTER 6FH: TTB INDIRECT DATA...........................................................208
REGISTER 70H: TTB EXPECTED PAYLOAD TYPE LABEL...........................209
REGISTER 71H: TTB PAYLOAD TYPE LABEL CONTROL/STATUS: .............211

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DATA SHEET
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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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REGISTER 74H: SYNC FIFO PA RITY CONTROL/STATUS:...........................213
ADDRESS 80H MASTER TEST......................................................................220

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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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LIST OF FIGURES
FIGURE 1 - DS3 AND E3 USER NETWORK INTERFACE ...............................7
FIGURE 2 - DS1 AND E1 USER NETWORK INTERFACE ...............................8
FIGURE 3 - CELL DELINEATION STATE DIAGRAM.......................................48
FIGURE 4 - HCS VERIFICATION STATE DIAGRAM .......................................51
FIGURE 5 - DS3 PLCP FRAME FORMAT.....................................................225
FIGURE 6 - DS1 PLCP FRAME FORMAT.....................................................226
FIGURE 7 - G.751 E3 PLCP FRAME FORMAT.............................................226
FIGURE 8 - E1 PLCP FRAME FORMAT .......................................................227
FIGURE 9 - G.832 E3 FRAME STRUCTURE................................................231
FIGURE 10- CELL DATA STRUCTURE..........................................................233
FIGURE 11- TYPICAL DATA FRAME..............................................................238
FIGURE 12- SSI 78P7200 CONFIGURATION................................................239
FIGURE 13- RECEIVE DS1 STREAM............................................................241
FIGURE 14- RECEIVE E1 PLCP STREAM....................................................241
FIGURE 15- RECEIVE E1 ATM DIRECT-MAPPED STREAM ........................242
FIGURE 16- RECEIVE BIPOLAR DS3 STREAM...........................................242
FIGURE 17- RECEIVE UNIPOLAR DS3 STREAM ........................................243
FIGURE 18- RECEIVE BIPOLAR E3 STREAM..............................................243
FIGURE 19- RECEIVE UNIPOLAR E3 STREAM...........................................244
FIGURE 20- RECEIVE DS3 OVERHEAD.......................................................244
FIGURE 21- RECEIVE G.832 E3 OVERHEAD...............................................245
FIGURE 22- RECEIVE G.751 E3 OVERHEAD...............................................246

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FIGURE 23- RECEIVE PLCP OVERHEAD ....................................................247
FIGURE 24- TRANSMIT DS1 STREAM .........................................................248
FIGURE 25- TRANSMIT E1 STREAM............................................................248
FIGURE 26- TRANSMIT BIPOLAR DS3 STREAM.........................................249
FIGURE 27- TRANSMIT UNIPOLAR DS3 STREAM......................................249
FIGURE 28- TRANSMIT BIPOLAR E3 STREAM ...........................................250
FIGURE 29- TRANSMIT UNIPOLAR E3 STREAM.........................................250
FIGURE 30- TRANSMIT DS3 OVERHEAD ....................................................251
FIGURE 31- TRANSMIT G.832 E3 OVERHEAD............................................252
FIGURE 32- TRANSMIT G.751 E3 OVERHEAD............................................253
FIGURE 33- TRANSMIT PLCP OVERHEAD..................................................254
FIGURE 34- GENERIC TRANSMIT STREAM................................................255
FIGURE 35- RECEIVE FIFO INTERFACE (84-PIN PLCC AND 100-PIN PQFP
WITH SYFIFOB=1)..........................................................................................256
FIGURE 36- TRANSMIT FIFO INTERFACE (84-PIN PLCC AND 100-PIN PQFP
WITH SYFIFOB=1)..........................................................................................257
FIGURE 37- RECEIVE SYNCHRONOUS FIFO (100-PIN PQFP WITH
SYFIFOB=0, TSEN=0)....................................................................................258
FIGURE 38- RECEIVE SYNCHRONOUS FIFO (100-PIN PQFP WITH
SYFIFOB=0, TSEN=1)....................................................................................259
FIGURE 39- TRANSMIT SYNCHRONOUS FIFO (100-PIN PQFP WITH
SYFIFOB=0)....................................................................................................260
FIGURE 40- RECEIVE FIFO BYPASS INTERFACE.......................................260
FIGURE 41- TRANSMIT FIFO BYPASS INTERFACE ....................................261
FIGURE 42- MICROPROCESSOR READ ACCESS TIMING.........................267
FIGURE 43- MICROPROCESSOR WRITE ACCESS TIMING .......................269

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FIGURE 44- TRANSMIT FIFO TIMING...........................................................272
FIGURE 45- RECEIVE FIFO TIMING .............................................................274
FIGURE 46- TRANSMIT FIFO TIMING...........................................................276
FIGURE 47- RECEIVE FIFO TIMING .............................................................278
FIGURE 48- TRANSMIT SYSTEM SIDE - FIFO BYPASS..............................279
FIGURE 49- RECEIVE SYSTEM SIDE - FIFO BYPASS ................................280
FIGURE 50- INPUT TIMING ...........................................................................282
FIGURE 51- INPUT TIMING – CONT’D..........................................................283
FIGURE 52- OUTPUT TIMING .......................................................................284
FIGURE 53- OUTPUT TIMING - CONT’D.......................................................285
FIGURE 54- OVERHEAD OUTPUT TIMING ..................................................286

PM7345 S/UNI-PDH
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PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
1
1
FEATURES
• Implements the ATM Direct Cell Mapping into DS1, DS3, E1, E3 transmission
systems according to ITU-T Draft Recommendation G.804.
• Implements the Physical Layer Convergence Protocol (PLCP) for DS1 and DS3
transmission systems according to the ATM Forum User Network Interface
Specification and ANSI TA-TSY-000773, TA-TSY-000772, and E1 and E3
transmission systems according to the ETSI Draft Standards T/NA(91)17, and
T/NA(91)18.
• Implements the ATM physical layer for Broadband ISDN according to ITU-T
Recommendation I.432.
• Provides on-chip DS3 and E3 (G.751 and G.832) framers.
• Directly interfaces to available E3/DS3 line interface units.
• Uses the PMC-Sierra PM4341 T1XC, PM6341 E1XC, and PM4351 COMET
framer/line interface chips for DS1 and E1 applications.
• Provides support for an arbitrary rate external transmission system interface up to
a maximum rate of 52 Mbit/s.
• Support is provided for SMDS and ATM mappings into various rate transmission
systems as defined below, as well as supporting the evolving mappings defined in
G.804:
Rate Format
SMDS PLCP
mapping
ATM Direct
mapping
SMDS PLCP
mapping
ATM Direct
mapping
45 MHz C-bit
M23
√
√
√
√
√√
34 MHz G.751
G.832
√√
√
√
2 MHz CRC-4
PCM30
√
√
√
√
Evolving
through G.804
√
1.5 MHz ESF
SF
√
√
√
√
√
• Provides an 8-bit microprocessor interface for configuration, control and status
monitoring.
• Low power CMOS technology.

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• Available in a high density 100-pin PQFP package, or in an 84-pin PLCC package
which is pin-compatible with the PMC-Sierra PM7321 PLPP standard product.
The receiver section:
• Provides frame synchronization for the M23 or C-bit parity DS3 applications,
alarm detection, and accumulates line code violations, framing errors, parity
errors, path parity errors and FEBE events. In addition, far end alarm channel
codes are detected, and an integral HDLC receiver is provided to terminate the
path maintenance data link.
• Provides frame synchronization for the G.751 or G.832 E3 applications, alarm
detection, and accumulates line code violations, framing errors, parity errors, and
FEBE events. In addition, in G.832, the Trail Trace is detected, and an integral
HDLC receiver is provided to terminate either the Network Requirement or the
General Purpose data link.
• Provides frame synchronization, path overhead extraction, and cell extraction for
DS1 PLCP, DS3 PLCP, E1 PLCP, G.751 E3 PLCP formats, or G.832 formatted
streams.
• Provides detection of yellow alarm and loss of frame (LOF), and accumulates
BIP-8 errors, framing errors and FEBE events.
• Provides ATM framing using cell delineation.
• Provides cell descrambling, header check sequence (HCS) error detection,
idle/unassigned cell filtering, and accumulates the number of received
idle/unassigned cells, the number of received cells written to the FIFO, and the
number of HCS errors.
• Provides a four cell FIFO for rate decoupling between the line, and a higher layer
processing entity. This FIFO may be bypassed to minimize the delay through the
device when processing PLCP frames.
• Provides an asynchronous 8-bit wide FIFO interface for accessing received cell
data bytes (available in either 84-pin PLCC or 100-pin PQFP packages).
• Provides a synchronous 8-bit wide FIFO with receive byte parity generation and
compatible timing with current “UTOPIA” specifications for single PHY and multiPHY interfaces (available only in the 100-pin PQFP package).

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The transmitter section:
• Provides frame insertion for the M23 or C-bit parity DS3 applications, alarm
insertion, and diagnostic features. In addition, far end alarm channel codes may
be inserted, and an integral HDLC transmitter is provided to insert the path
maintenance data link.
• Provides frame insertion for the G.751 or G.832 E3 applications, alarm insertion,
and diagnostic features. In addition, for G.832, the Trail Trace is inserted, and an
integral HDLC transmitter is provided to insert either the Network Requirement or
the General Purpose data link.
• Provides frame insertion and path overhead insertion for DS1, DS3, E1 or E3
based PLCP formats. In addition, alarm insertion, and diagnostic features are
provided.
• Provides an optional 8 kHz reference input for locking the transmit PLCP frame
rate to an externally applied frame reference.
• Provides optional ATM cell scrambling, HCS generation/insertion, programmable
idle/unassigned cell insertion, diagnostics features and accumulates transmitted
cells read from the FIFO.
• Provides a four cell FIFO for rate decoupling between the line, and a higher layer
processing entity. This FIFO may be bypassed to minimize the delay through the
device when processing PCLP frames.
• Provides an asynchronous 8-bit wide FIFO interface for accessing transmit cell
data bytes (available in either 84-pin PLCC or 100-pin PQFP packages).
• Provides a synchronous 8-bit wide FIFO with transmit byte parity checking and
compatible timing with current “UTOPIA” specifications for single PHY and multiPHY interfaces (available only in the 100-pin PQFP package).
Bypass and Loopback features:
• Allows bypassing of the DS3 or E3 framer to enable transmission system sublayer
processing by an external device (for example, the PM4341 DS1 Framer/LIU may
be used for DS1-based services, and the PM6341 E1 Framer/LIU may be used
for E1-based services).
• Provides for DS3 or E3 diagnostic loopback, DS3 or E3 line loopback, DS3 or E3
payload loopback, and ATM cell loopback.

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PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
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2
APPLICATIONS
• ATM or SMDS Routers, Bridges, Switches, and Adapter Cards
• DQDB Access Units
• ATM and SMDS test equipment
3
REFERENCES
• American National Standard for Telecommunications, ANSI T1.107-1995 - “Digital
Hierarchy - Formats Specification s ”.
• Bell Communications Research, TA-TSY-000773 - “Local Access System Generic
Requirements, Objectives, and Interface in Support of Switched Multi-megabit
Data Service” Issue 2, March 1990 and Supplement 1, December 1990.
• ITU-T, Recommendation I.432 - “B-ISDN User-Network Interface - Physical Layer
Specification”, 1993.
• ITU-T Recommendation G.704 – “General Aspects of Digital Transmission
Systems; Terminal Equipments – Synchronous Frame Structures Used At 1544,
6312, 2048, 8488 and 44 736 kbit/s Hierarchical Levels”, July, 1995.
• ITU-T Blue Book, Recommendation G.751, - “Digital Multiplex Equipments
Operating at the Third Order Bit Rate of 34368 kbit/s and the Fourth Order Bit
Rate of 139264 kbit/s and using Positive Justification”, Vol. III, Fascicle III.4, 1988.
• ITU-T Recommendation G.804 - “ATM Cell Mapping into Plesiochronous Digital
Hierarchy (PDH)”, 1993.
• ITU-T Recommendation G.832 - “Transport of SDH Elements on PDH Networks:
Frame and Multiplexing Structures”, 1993.
• ETSI 300 269 “Metropolitan Area Network Physical Layer Convergence
Procedure for 2.048 Mbit/s”, April 1994.
• ETSI 300 270 “Metropolitan Area Network Physical Layer Convergence
Procedure for 34.368 Mbit/s”, April 1994.
• IEEE, Std 802.6-1990 - “Distributed Queue Dual Bus Subnetwork of a
Metropolitan Area Network”.

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• ATM Forum, V3.1, October, 1995 - “ATM User-Network Interface Specification”.
• ATM Forum, 94-0406R5, E3 (34,368 kpbs) Physical Layer Interface”, Dec. 21,
1994.
• ATM Forum, 95-1207R1, “DS3 Physical Layer Interface Specification”, December,
1995.
• ATM Forum, Level 1, V2.00 - February 1994 - “An ATM PHY Data path Interface”.

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
6
4
APPLICATION EXAMPLES
The PM7345 S/UNI-PDH is used to implement ATM user network interfaces (UNI)
and network node interfaces (NNI). An example of a DS3/E3 User Network Interface
(figure 1) and a DS1/E1 User Network Interface (figure 2) illustrate the interconnect
between the S/UNI-PDH and system elements required to implement a complete
ATM physical layer interface.
In figure 1, the DS3/E3 line interface function is provided by a commercially
available DS3/E3 Line Interface Unit (LIU) product available from Silicon Systems.
The DS3/E3 framing function, along with all PLCP processing, and ATM
transmission convergence sublayer processing are performed by the S/UNI-PDH.
In figure 2, the DS1 LIU and framing functions are provided by the PM4341 T1
Transceiver (T1XC) product available from PMC-Sierra. The E1 LIU and framing
functions are provided by the PM6341 E1 Transceiver (E1XC) product, also
available from PMC-Sierra. The combination of these transceiver devices with the
S/UNI-PDH allows both PLCP-formatted DS1/E1 signals, and ITU-T G.804
compliant DS1/E1 signals to be processed. The G.804 specification defines ATM
direct cell mappings for a variety of transmission formats, including the 1.544 Mbit/s
DS1, and the 2.048 Mbit/s E1 formats.
The optional PLCP and DS3/E3 Overhead Processors illustrated are expected to be
implemented using programmable logic devices. For further S/UNI-PDH application
information, please refer to document number PMC-930410, "The ATM Physical
Layer".

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
7
Figure 1 - DS3 and E3 User Network Interface
Optional
DS3/E3/PLCP
Overhead
Processor
( eg. tester
application)
PM7345
S/UNI-PDH
SATURN
User-Network
Interface for
PDH
ATM/SMDS
Adaptation
Layer
Processor
(eg. SAR or
policing
functions)
SSI
78P7200
E3/DS3
LIU
RPOS
RNEG
RCLK
TPOS
TNEG
TCLK
RPOS/RDAT
RNEG/ROHM
RCLK
TPOS/TDAT
TNEG/TOHM
TCLK
TICLK
TIOHM
C13/CADD
TCELL
RCELL
A[7:0]
D[7:0]
ALE
RDB
WRB
CSB
RSTB
RRDENB
FRDB/RFCLK
RSOC
REOH
REOC
FRDATA[7:0]
RFIFOE/RCA
TWRENB
FWRB/TFCLK
TSOC
FWDATA[7:0]
TFIFOFB/TCA
TPOHCLK
TPOHFP
TPOHINS
TPOH
RPOHCLK
RPOHFP
RPOH
TOHCLK
TOHFP
TOHINS
TOH
ROHCLK
ROHFP
ROH
INTB
AD[15:0]
ALE
RDB
WRB
RESB
INT
From Master
reset circuitry
From chip select
decode circuitry
+5V
OSC
44.736 MHz
LINE
IN
INTERFACE
LINE
OUT
INTERFACE
AD[15:0]
ALE
RDB
WRB
RESB
INT
From Master
reset circuitry
From chip select
decode circuitry
OSC
44.736 MHz
or
34.368 MHz
RX
CELL
INTERFACE
TX
CELL
INTERFACE
Intel/
Motorola
Single Chip
µP
Layout information for the SSI 78P7200 E3/DS3 LIU is found in the OPERATION
section of this document. Please refer to it as an example of the E3 and DS3
configuration used by PMC-Sierra.
1
1
Please contact Silicon Systems at (714) 573-6200 for detailed application information concerning the
78P7200 E3/DS3 LIU.

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
8
Figure 2 - DS1 and E1 User Network Interface
RAS
REF
RRC
TC
TAP
TAN
XCLK
BRPCM
BRFPO
RCLKO
BTPCM
BTFP
BTCLK
TCLKO
TCLKI
PM4341A/PM6341
T1XC/E1XC
DS1 or E1
Transceiver
PM7345
S/UNI-PDH
SATURN
User-Network
Interface for
PDH
RPOS/RDAT
RNEG/ROHM
RCLK
TIOHM
C13/CADD
TPOS/TDAT
TNEG/TOHM
TCLK
TICLK
TCELL
RCELL
A[7:0]
D[7:0]
ALE
RDB
WRB
CSB
RSTB
AD[15:0]
ALE
RDB
WRB
RESB
INT
From Master
reset circuitry
From chip select
decode circuitry
+5V
A[7:0]
D[7:0]
ALE
RDB
WRB
CSB
RSTB
AD[15:0]
ALE
RDB
WRB
RESB
INT
OSC
37.056 MHz (DS1)
49.152 MHz (E1)
RX
CELL
INTERFACE
TX
CELL
INTERFACE
Optional
PLCP
Overhead
Processor
( eg. tester
application )
Intel/
Motorola
Single Chip
µP
ATM/SMDS
Adaptation
Layer
Processor
(eg. SAR or
policing
functions)
RRDENB
FRDB/RFCLK
RSOC
REOH
REOC
FRDATA[7:0]
RFIFOE/RCA
TWRENB
FWRB/TFCLK
TSOC
FWDATA[7:0]
TFIFOFB/TCA
TPOHCLK
TPOHFP
TPOHINS
TPOH
RPOHCLK
RPOHFP
RPOH
TOHCLK
TOHFP
TOHINS
TOH
ROHCLK
ROHFP
ROH
INTB
DS1
1.544 MHz
E1
2.048 MHz

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
9
5
BLOCK DIAGRAM
TPOS/TDAT
RNEG/ROHM
RPOS/RDAT
TCLK
TNEG/TOHM
RCLK
TXFF
Tx
4 Cell
FIFO
RXFF
Rx
4 Cell
FIFO
System
I/F
SPLT
Transmit ATM
and PLCP
Framer
FWDATA[7:0]
TSOC
FWRB
FRDATA[7:0]
RSOC
D[7:0]
A[7:0]
ALE
CSB
RDB
WRB
RSTB
INTB
Microprocessor
I/F
Rx
O/H
Access
Tx
O/H
Access
TOHINS
ROH
TOHCLK
ROHFP
RPOH
TPOH
TPOHINS
RPOHCLK
ROHCLK
TOH
TRAN
DS3 or E3
Transmit
Framer
FRMR
DS3 or E3
Receive
Framer
TOHFP
C13/CADD/8KREFRPOHFP
TFIFOFB/FWCLK
TICLK
TIOHM
TXCP
Tx
Cell
Processor
RXCP
Rx
Cell
Processor
REOH/LOF
REOC/OOF
Line
Encode
Line
Decode
TCELL
RCELL
CPPM
PLCP/cell
Perf. Monitor
ATMF/SPLR
Receive
ATM and
PCLP Framer
XFDL
Tx
HDLC
XBOC
Tx
FEAC
RFDL
Rx
HDLC
RBOC
Rx
FEAC
TPOHCLK
TPOHFP
PMON
Perf.
Monitor
1/2 TTB
Rx Trail
Buffer
1/2 TTB
Tx Trail
Buffer
RFIFOE/FRCLK
FRDB
Normal Operating Mode (84-pin PLCC Async FIFO interface shown)

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
10
TXFF
Tx
4 Cell
FIFO
RXFF
Rx
4 Cell
FIFO
System
I/F
SPLT
Transmit ATM
and PLCP
Framer
FWDATA[7:0]
TSOC
TFCLK
FRDATA[7:0]
RSOC
D[7:0]
A[7:0]
ALE
CSB
RDB
WRB
RSTB
INTB
Microprocessor
I/F
Rx
O/H
Access
Tx
O/H
Access
TOHINS
ROH
TOHCLK
ROHFP
RPOH
TPOH
TPOHINS
RPOHCLK
ROHCLK
TOH
TRAN
DS3 or E3
Transmit
Framer
FRMR
DS3 or E3
Receive
Framer
TOHFP
C13/CADD/8KREFRPOHFP
TCA
TICLK
TIOHM
TXCP
Tx
Cell
Processor
RXCP
Rx
Cell
Processor
REOH
REOC
TPOS/TDAT
Line
Encode
RNEG/ROHM
Line
Decode
RPOS/RDAT
TCLK
TNEG/TOHM
RCLK
TCELL
RCELL
CPPM
PLCP/cell
Perf. Monitor
ATMF/SPLR
Receive
ATM and
PCLP Framer
XFDL
Tx
HDLC
XBOC
Tx
FEAC
RFDL
Rx
HDLC
RBOC
Rx
FEAC
TPOHCLK
TPOHFP
PMON
Perf.
Monitor
1/2 TTB
Rx Trail
Buffer
1/2 TTB
Tx Trail
Buffer
TDLSIG
TDLCLK
TSEN
TWRENB
TXPRTY
RCA
RXPRTY
RRDENB
RFCLK
RDLSIG
RDLCLK
Normal Operating Mode (100-pin PQFP Sync FIFO interface shown)
TPOS/TDAT
RNEG/ROHM
RPOS/RDAT
TCLK
TNEG/TOHM
RCLK
TXFF
Tx
4 Cell
FIFO
RXFF
Rx
4 Cell
FIFO
System
I/F
SPLT
Transmit ATM
and PLCP
Framer
FWDATA[7:0]
TSOC
FWRB
FRDATA[7:0]
RSOC
D[7:0]
A[7:0]
ALE
CSB
RDB
WRB
RSTB
INTB
Microprocessor
I/F
Rx
O/H
Access
Tx
O/H
Access
TOHINS
ROH
TOHCLK
ROHFP
RPOH
TPOH
TPOHINS
RPOHCLK
ROHCLK
TOH
TRAN
DS3 or E3
Transmit
Framer
FRMR
DS3 or E3
Receive
Framer
TOHFP
C13/CADD/8KREFRPOHFP
TFIFOFB/FWCLK
TICLK
TIOHM
TXCP
Tx
Cell
Processor
RXCP
Rx
Cell
Processor
REOH/LOF
REOC/OOF
Line
Encode
Line
Decode
TCELL
RCELL
CPPM
PLCP/cell
Perf. Monitor
ATMF/SPLR
Receive
ATM and
PCLP Framer
XFDL
Tx
HDLC
XBOC
Tx
FEAC
RFDL
Rx
HDLC
RBOC
Rx
FEAC
TPOHCLK
TPOHFP
PMON
Perf.
Monitor
1/2 TTB
Rx Trail
Buffer
1/2 TTB
Tx Trail
Buffer
RFIFOE/FRCLK
FRDB
With FIFO Bypass Enabled

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
11
TPOS/TDAT
RNEG/ROHM
RPOS/RDAT
TCLK
TNEG/TOHM
RCLK
TXFF
Tx
4 Cell
FIFO
RXFF
Rx
4 Cell
FIFO
System
I/F
SPLT
Transmit ATM
and PLCP
Framer
FWDATA[7:0]
TSOC
FWRB
FRDATA[7:0]
RSOC
D[7:0]
A[7:0]
ALE
CSB
RDB
WRB
RSTB
INTB
Microprocessor
I/F
Rx
O/H
Access
Tx
O/H
Access
TOHINS
ROH
TOHCLK
ROHFP
RPOH
TPOH
TPOHINS
RPOHCLK
ROHCLK
TOH
TRAN
DS3 or E3
Transmit
Framer
FRMR
DS3 or E3
Receive
Framer
TOHFP
C13/CADD/8KREFRPOHFP
TFIFOFB/FWCLK
TICLK
TIOHM
TXCP
Tx
Cell
Processor
RXCP
Rx
Cell
Processor
REOH/LOF
REOC/OOF
Line
Encode
Line
Decode
TCELL
RCELL
CPPM
PLCP/cell
Perf. Monitor
ATMF/SPLR
Receive
ATM and
PCLP Framer
XFDL
Tx
HDLC
XBOC
Tx
FEAC
RFDL
Rx
HDLC
RBOC
Rx
FEAC
TPOHCLK
TPOHFP
PMON
Perf.
Monitor
1/2 TTB
Rx Trail
Buffer
1/2 TTB
Tx Trail
Buffer
RFIFOE/FRCLK
FRDB
With DS3/E3 Framer Bypassed
TPOS/TDAT
RNEG/ROHM
RPOS/RDAT
TCLK
TNEG/TOHM
RCLK
TXFF
Tx
4 Cell
FIFO
RXFF
Rx
4 Cell
FIFO
System
I/F
SPLT
Transmit ATM
and PLCP
Framer
FWDATA[7:0]
TSOC
FWRB
FRDATA[7:0]
RSOC
D[7:0]
A[7:0]
ALE
CSB
RDB
WRB
RSTB
INTB
Microprocessor
I/F
Rx
O/H
Access
Tx
O/H
Access
TOHINS
ROH
TOHCLK
ROHFP
RPOH
TPOH
TPOHINS
RPOHCLK
ROHCLK
TOH
TRAN
DS3 or E3
Transmit
Framer
FRMR
DS3 or E3
Receive
Framer
TOHFP
C13/CADD/8KREFRPOHFP
TFIFOFB/FWCLK
TICLK
TIOHM
TXCP
Tx
Cell
Processor
RXCP
Rx
Cell
Processor
REOH/LOF
REOC/OOF
Line
Encode
Line
Decode
TCELL
RCELL
CPPM
PLCP/cell
Perf. Monitor
ATMF/SPLR
Receive
ATM and
PCLP Framer
XFDL
Tx
HDLC
XBOC
Tx
FEAC
RFDL
Rx
HDLC
RBOC
Rx
FEAC
TPOHCLK
TPOHFP
PMON
Perf.
Monitor
1/2 TTB
Rx Trail
Buffer
1/2 TTB
Tx Trail
Buffer
RFIFOE/FRCLK
FRDB
LINE
PAYLOAD
TIMING
CELL
DIAGNOSTIC
Loopback Modes

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
12
6
DESCRIPTION
The PM7345 S/UNI-PDH is an ATM physical layer processor with integrated DS3
and E3 framing. PLCP sublayer DS1, DS3, E1, and E3 processing is supported as
is ATM cell delineation.
The S/UNI-PDH contains an integral DS3 framer, which provides DS3 framing and
error accumulation in accordance with ANSI specifications, and an integral E3
framer, which provides E3 framing in accordance with ITU-T Recommendations
G.832 and G.751. When configured for DS3 transmission system sublayer
processing, the S/UNI-PDH accepts and outputs either a B3ZS-encoded bipolar or a
unipolar signal compatible with M23 and C-bit parity applications. When configured
for E3 transmission system sublayer processing, the S/UNI-PDH accepts and
outputs either a HDB3-encoded bipolar or a unipolar signal compatible with G.751
and G.832 applications. When configured for DS1, or E1 transmission system
sublayer processing, the S/UNI-PDH accepts and outputs a unipolar signal with
appropriate clock and frame pulse signals for physical sublayer processing. When
configured for other transmission systems, the S/UNI-PDH provides a generic
interface for physical sublayer processing.
In the DS3 receive direction, the S/UNI-PDH frames to a DS3 signal with a
maximum average reframe time of 1.5 ms and detects line code violations, loss of
signal, framing bit errors, parity errors, path parity errors, AIS, far end receive failure
and idle code. The DS3 overhead bits are extracted and presented on a serial
output. When in C-bit parity mode, the Path Maintenance Data Link and the Far End
Alarm and Control (FEAC) channel are extracted. An HDLC receiver is provided for
Path Maintenance Data Link support. In addition, valid bit-oriented codes in the
FEAC channel are detected and are available through the microprocessor port.
In the E3 receive direction, the S/UNI-PDH frames to either a G.751 or G.832 E3
signal with a maximum average reframe time of 0.5 ms and detects line code
violations, loss of signal, framing bit errors, AIS, and remote alarm indication.
Further, when processing G.832 formatted data, parity errors, far end receive failure,
and far end block errors are also detected; and the Trail Trace message is extracted
and made available through the microprocessor port. An HDLC receiver is provided
for either the G.832 Network Requirement or the G.832 General Purpose Data Link
support.
Error event accumulation is also provided by the S/UNI-PDH. Framing bit errors,
line code violations, parity errors, path parity errors and far end block errors are
accumulated in saturating counters.

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
13
In the DS3 transmit direction, the S/UNI-PDH inserts DS3 framing, X and P bits.
When enabled for C-bit parity operation, a bit-oriented code transmitter and an
HDLC transmitter are provided for insertion of the FEAC channel and the Path
Maintenance Data Link into the appropriate overhead bits. The Alarm Indication
Signal can be inserted when enabled by an external input or using an internal
register bit; other status signals such as the idle signal can be inserted when
enabled by an internal register bit. When M23 operation is selected, the C-bit Parity
ID bit (the first C-bit of the first M sub-frame) is forced to toggle so that downstream
equipment will not confuse an M23-formatted stream with stuck-at 1 C-bits for C-bit
Parity application.
In the E3 transmit direction, the S/UNI-PDH inserts E3 framing in either G.832 or
G.751 format. When enabled for G.832 operation, an HDLC transmitter is provided
for insertion of either the Network Requirement or General Purpose Data Link into
the appropriate overhead bits. The Alarm Indication Signal and other status signals
can be inserted by internal register bits.
The S/UNI-PDH also supports diagnostic modes in which it inserts parity or path
parity errors, F-bit framing errors, M-bit framing errors, invalid X or P-bits, line code
violations, or all-zeros.
The S/UNI-PDH provides cell delineation for ATM cells using the PLCP framing
format, or by using the header check sequence octet in the ATM cell header as
specified by ITU-T Recommendation I.432. DS1, DS3, E1 and E3 based PLCP
frame formats can be processed. An interface consistent with the generic physical
interface defined by ITU-T Recommendation I.432 is provided for arbitrary rates up
to 52 Mbit/s. This interface is used to provide physical layer support for
transmission systems that do not have an associated PLCP sublayer, or to provide
an efficient means of directly mapping ATM cells to existing transmission system
formats (such as DS3 and DS1).
In the PLCP receive direction, framing, path overhead extraction and cell extraction
is provided. BIP-8 error events, frame octet error events and far end block error
events are accumulated.
In the PLCP transmit direction, the S/UNI-PDH provides overhead insertion using
inputs or internal registers, DS3 nibble and E3 byte stuffing, automatic BIP-8 octet
generation and insertion and automatic far end block error insertion. Diagnostic
features for BIP-8 error, framing error and far end block error insertion are also
supported.
In the cell receive path, idle/unassigned cells may be dropped according to a
programmable filter. By default, incoming cells with single bit HCS errors are
corrected and written to the FIFO buffer. Optionally, cells can be dropped upon

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
14
detection of a HCS error. The ATM cell payloads are optionally descrambled.
Assigned cells containing no detectable HCS errors are written to a FIFO buffer.
Cells are read from the FIFO using an asynchronous 8-bit wide datapath interface or
a synchronous 9-bit wide datapath, depending upon the packaging option selected.
Counts of error-free assigned cells, and cells containing HCS errors are
accumulated independently for performance monitoring purposes.
In the cell transmit path, cells are written to a FIFO buffer using an asynchronous 8bit wide datapath interface or a synchronous 9-bit wide datapath interface,
depending upon the packaging option selected. Idle/unassigned cells are
automatically inserted when the FIFO contains less than one full cell. HCS
generation, and cell payload scrambling are optionally provided.
Both receive and transmit cell FIFOs provide buffering for four cells. The FIFOs
provide the rate matching interface between the higher layer ATM entity and the
S/UNI-PDH.
The S/UNI-PDH is configured, controlled and monitored via a generic 8-bit
microprocessor bus through which all internal registers are accessed. All sources of
interrupts can be identified, acknowledged, or masked via this interface.

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
15
7
PIN DIAGRAM
The S/UNI-PDH is available in an 84-pin PLCC.
S/
UNI-
PM7345
FWDATA[4]
FWDATA[5]
ROHFP
ROHCLK
ROH
RNEG/ROHM
RPOS/RDAT
RCLK
INTB
RSTB
CSB
VDDO
VSSO
RPOHCLK
FWRB
FWDATA[7]
RPOH
RPOHFP
FWDATA[6]
RDB
WRB
55
54
57
56
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
33 34 52434241403938373635 5150494847464544 53
FWDATA[0]
RSOC
FWDATA[3]
FWDATA[2]
FWDATA[1]
FRDB
FRDATA[7]
FRDATA[6]
FRDATA[5]
FRDATA[4]
VDDO
VSSI
VDDI
FRDATA[3]
FRDATA[2]
FRDATA[1]
FRDATA[0]
REOC/OOF
REOH/LOF
RFIFOE/FRCLK
ALE
A[0]
A[1]
A[2]
A[3]
D[0]
D[1]
D[2]
D[3]
VDDO
VSSI
VDDI
VSSO
D[4]
D[5]
D[6]
D[7]
A[4]
A[5]
A[6]
A[7]
31
29
30
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
32
12
757612345678977787980818283841011
NC
TIOHM
TICLK
C13/CADD/8KREF
TCLK
TPOS/TDAT
TNEG/TOHM
TOHCLK
TOHFP
VDDO
VSSO
TOHINS
TOH
TPOHCLK
TPOHFP
TPOHINS
TPOH
TCELL
TFIFOFB/FWCLK
TSOC
RCELL
VSSO
PDH
TM

PM7345 S/UNI-PDH
DATA SHEET
PMC-931011 ISSUE 6 SATURN USER-NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
16
The S/UNI-PDH is also available in a 100-pin PQFP having a body size of 14x14mm
and a pin pitch of 0.5mm.
NC
VDDI
ALE
A[0]
A[1]
A[2]
A[3]
D[0]
D[1]
D[2]
D[3]
VDDO
VSSI
PIN 1
PIN 100
PIN 25
PIN 26
PIN 50
PIN 51
PIN 75
PIN 76
VSSO
NC
TDLSIG
PM7345
VDDI
VSSO
D[4]
D[5]
D[6]
D[7]
A[4]
A[5]
A[6]
A[7]
NC
TIOHM
TICLK
C13/CADD/8KREF
TCLK
TPOS/TDAT
TNEG/TOHM
TOHCLK
TOHFP
VDDO
TDLCLK
VSSO
TOHINS
TOH
TPOHCLK
TPOHFP
TPOHINS
TPOH
TCELL
TFIFOFB/TCA/FWCLK
TSOC
RCELL
SYFIFOB
LCD
FWRDATA[3]
FWRDATA[2]
FWRDATA[1]
FWRDATA[0]
RRDENB
FRDB/RFCLK
FRDATA[7]
FRDATA[6]
FRDATA[5]
FRDATA[4]
VDDO
VSSO
RXPRTY
VSSI
VDDI
FRDATA[3]
FRDATA[2]
FRDATA[1]
FRDATA[0]
RSOC
REOC/OOF
REOH/LOF
RFIFOE/RCA/FRCLK
TSEN
VDDO
RDB
WRB
CSB
RSTB
INTB
RCLK
RPOS/RDAT
RNEG/ROHM
ROH
ROHCLK
ROHFP
RDLSIG
TXPRTY
VSSO
RPOH
RPOHCLK
RPOHFP
TWRENB
FWRB/TFCLK
FWRDATA[7]
FWRDATA[6]
FWRDATA[5]
FWRDATA[4]
VSSI
RDLCLK
Index
TM
PDH
S/
UNI-