TABLE 18 - JTAG PORT INTERFACE TIMING (FIGURE 50)....................... 272
TABLE 19 - S/UNI-MPH ORDERING INFORMATION .................................. 274
TABLE 20 - S/UNI-MPH THERMAL INFORMATION .................................... 274
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PM7344 S/UNI-MPH
DATA SHEET
PMC-950449ISSUE 6MULTI-PHY USER NETWORK INTERFACE
1 FEATURES
• Single chip quad ATM User Network Interface operating at 1.544 Mbit/s or
2.048 Mbit/s.
• Implements the ATM Forum User Network Interface Specification V3.1 for
DS1 and E1 transmission rates.
• Implements the ATM physical layer for Broadband ISDN according to ITU-T
Recommendation I.432.
• Implements the direct cell mapping into DS1 or E1 transmission systems
according to ITU-T Recommendation G.804.
• Implements (with an external framer device) the direct cell mapping into J2
(6.312 Mbit/s) transmission systems according to ITU-T Recommendation
G.804.
• Integrates a quad full-featured T1/E1 framer/transmitter for terminating four
duplex 1.544 Mbit/s DS-1 signals or four duplex 2.048 Mbit/s E1 signals.
• Integrates a quad ATM cell processor for mapping ATM cells into T1, E1 and
other arbitrary rate streams using HEC (Header Check Sequence Error
Correction) cell delineation.
• Provides Saturn Compatible Interface (SCI-PHY
TM
) FIFO buffers in both
transmit and receive paths with parity support and Utopia Level 2 compatible
multi-PHY control signals.
• Software compatible with the PM4341A T1XC, PM6341 E1XC, and PM7345
S/UNI-PDH.
• Provides a standard 5 signal P1149.1 JTAG test port for boundary scan board
test purposes.
• Provides a generic 8-bit microprocessor bus interface for configuration,
control, and status monitoring.
• Low power, +5V, CMOS technology
• 128 pin rectangular (14mm x 20mm) PQFP package.
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The T1 framer section:
• Recovers clock and data using a digital phase locked loop for high jitter
tolerance. A direct clock input is provided to allow clock recovery to be
bypassed.
• Accepts dual rail or single rail digital PCM inputs.
• Supports B8ZS or AMI line code.
• Accepts gapped data streams to support higher rate demultiplexing.
• Frames to SF or ESF format DS1 signals. Provides loss of signal detection,
and red, yellow, and AIS alarm detection. Red, yellow, and AIS alarms are
integrated as per industry specifications.
• Detects violations of the ANSI T1.403 12.5% pulse density rule over a moving
192 bit window.
• Provides programmable framed or unframed in-band loopback code
detection.
• Supports line and path performance monitoring according to ANSI
specifications. Accumulators are provided for counting:
• ESF CRC-6 errors to 333 per second;
• Framing bit errors to 31 per second;
• Line code violations to 4095 per second; and
• Loss of frame or change of frame alignment events to 7 per
second.
• Provides ESF bit-oriented code detection, and an HDLC interface for
terminating the ESF data link.
• Supports polled, interrupt-driven, or DMA servicing of the HDLC interface.
• Extracts the data link in ESF mode.
The T1 transmitter section:
• Formats data to SF or ESF format DS1 signals.
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• Detects violations of the ANSI T1.403 12.5% pulse density rule over a moving
192 bit window or optionally stuffs ones to maintain minimum ones density.
• Allows insertion of framed or unframed in-band loopback code sequences.
• Allows insertion of the data link in ESF mode.
• Supports transmission of the alarm indication signal (AIS) or the yellow alarm
signal in all formats.
• Provides ESF bit-oriented code generation and an HDLC interface for
generating the ESF data link.
• Supports polled, interrupt-driven, or DMA servicing of the HDLC interface.
• Supports B8ZS or AMI line code.
• Provides dual rail or single rail digital PCM output signals.
The E1 receiver section:
• Recovers clock and data using a digital phase locked loop for high jitter
tolerance. A direct clock input is provided to allow clock recovery to be
bypassed.
• Accepts dual rail or single rail digital PCM inputs.
• Supports HDB3 or AMI line code.
• Accepts gapped data streams to support higher rate demultiplexing.
• Frames to a G.704 2048 kbit/s signal within 1 ms.
• Frames to the CRC multiframe alignment when enabled.
• Frames to the signalling multiframe alignment when enabled.
• Provides loss of signal detection, and indicates loss of frame alignment
(OOF), loss of signalling multiframe alignment and loss of CRC multiframe
alignment.
• Supports line and path performance monitoring according to ITU-T
recommendations. Accumulators are provided for counting:
• CRC-4 errors to 1000 per second;
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• Far end block errors to 1000 per second;
• Frame sync errors to 127 per second; and
• Line code violations to 8191 per second;
• Indicates the reception of remote alarm.
• Indicates the reception of alarm indication signal (AIS).
• Declares RED and AIS alarms using Q.516 recommended integration
periods.
• Provides an HDLC interface for terminating a data link. Supports polled,
interrupt-driven, or DMA servicing of the HDLC interface.
• Optionally extracts the data link from timeslot 16 (64 kbit/s), which may be
used to receive common channel signalling, or from any combination of the
national bits in timeslot 1 of non-frame alignment signal frames (4 kbit/s - 20
kbit/s).
The E1 transmitter section:
• Formats data to create a G.704 2048 kbit/s signal. Optionally inserts
signalling multiframe alignment signal. Optionally inserts CRC multiframe
structure including optional transmission of far end block errors.
• Supports transmission of the alarm indication signal (AIS), timeslot 16 AIS,
remote alarm signal or remote multiframe alarm signal.
• Provides an HDLC interface for generating a data link. Supports polled,
interrupt-driven, or DMA servicing of the HDLC interface.
• Optionally inserts the data link into timeslot 16 (64 kbit/s), which may be used
to transmit common channel signalling, or into any combination of the
national bits in timeslot 0 of non-frame alignment signal frames (4 kbit/s - 20
kbit/s).
• Supports HDB3 or AMI line code.
• Provides dual rail or single rail digital PCM output signals.
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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.
• Provides a synchronous 8-bit wide FIFO with receive byte parity generation
and timing compatible with the Saturn Compatible Interface Specification
(SCI-PHYTM) for multi-PHY interfaces.
• All four receive ATM cell processors are serviced via a single 8-bit wide multi-
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.
• Provides a synchronous 8-bit wide FIFO with transmit byte parity checking
and timing compatible with the Saturn Compatible Interface Specification
TM
(SCI-PHY
) for multi-PHY interfaces.
• All four transmit ATM cell processors are serviced via a single 8-bit wide
multi-PHY interface.
Loopback features:
• Provides for DS1 or E1 line loopback, payload loopback, or diagnostic
loopback.
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2 APPLICATIONS
• ATM Switches Supporting DS1 or E1 UNI Ports
• ATM Switches Supporting DS3 Ports Carrying Multiplexed DS1 or E1 UNI
Signals
• ATM Switches Supporting STS-3/STM-1 Or Other SONET/SDH Ports
Carrying Tributary Mapped DS1 or E1 UNI Signals
• ATM Customer Premise Equipment Supporting Multiple DS1 or E1 UNI Ports
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3 REFERENCES
1. American National Standard for Telecommunications - Digital Hierarchy Electrical Interfaces, ANSI T1.102-1992.
2. American National Standard for Telecommunications - Digital Hierarchy Formats Specifications, ANSI T1.107-1991.
3. American National Standard for Telecommunications - Carrier to Customer
Installation - DS1 Metallic Interface Specification, ANSI T1.403-1989
4. American National Standard for Telecommunications - Integrated Services
Digital Network (ISDN) Primary Rate- Customer Installation Metallic
Interfaces Layer 1 Specification, ANSI T1.408-1990
5. Bell Communications Research - DS1 Rate Digital Service Monitoring Unit
Functional Specification, TA-TSY-000147, Issue 1, October, 1987.
6. Bell Communications Research - Alarm Indication Signal Requirements and
Objectives, TR-TSY-000191 Issue 1, May 1986.
7. Bell Communications Research - The Extended Superframe Format Interface
Specification, TR-TSY-000194 Issue 1, December 1987. (Replaced by TRTSY-000499)
8. Bell Communications Research - Transport Systems Generic Requirements
(TSGR): Common Requirement, TR-TSY-000499, Issue 3, December, 1989.
9. AT&T - Requirements For Interfacing Digital Terminal Equipment To Services
Employing The Extended Superframe Format, PUB54016, October 1984.
11. CCITT Red Book, Recommendation Q.516, - "Operations and maintenance
functions", Vol. VI, Fasc. VI.5, 1984.
12. ITU-T Recommendation G.703, - "Physical/Electrical Characteristics of
Hierarchical Digital Interfaces", Rev.1, 1991.
13. ITU-T Recommendation G.704, - "Synchronous Frame Structures Used at
Primary and Secondary Hierarchical Levels", Rev.1, 1991.
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14. ITU-T Recommendation G.706, - "Frame Alignment and Cyclic Redundancy
Check (CRC) Procedures Relating to Basic Frame Structures Defined in
Recommendation G.704", Rev.1, 1991.
15. ITU-T Recommendation G.737, - "Characteristics of an External Access
Equipment Operating at 2048 kbit/s Offering Synchronous Digital Access at
384 kbit/s and/or 64 kbit/s", Blue Book Fasc. III.4, 1988.
16. ITU-T Recommendation G.738, - "Characteristics of Primary PCM Multiplex
Equipment Operating at 2048 kbit/s and Offering Synchronous Digital Access
at 320 kbit/s and/or 64 kbit/s", Blue Book Fasc. III.4, 1988.
17. ITU-T Recommendation G.739, - "Characteristics of an External Access
Equipment Operating at 2048 kbit/s Offering Synchronous Digital Access at
320 kbit/s and/or 64 kbit/s", Blue Book Fasc. III.4, 1988.
18. ITU-T Recommendation G.742, - "Second Order Digital Multiplex Equipment
Operating at 8448 kbit/s and Using Positive Justification", Blue Book Fasc.
III.4, 1988.
19. ITU-T Recommendation G.821, - "Error Performance of an International
Digital Connection Forming Part of an Integrated Services Digital Network",
Blue Book Fasc. III.5, 1988.
20. ITU-T Recommendation G.823, - "The Control of Jitter and Wander Within
Digital Networks Which are Based on the 2048 kbit/s Hierarchy", 1993.
21. ITU-T Recommendation O.151, - "Error Performance Measuring Equipment
Operating at the Primary Rate and Above", Rev. 1, Oct. 1992.
22. CCITT Blue Book, Recommendation O.162, - "Equipment to Perform in
Service Monitoring on 2048 kbit/s Signals", Vol. IV, Fascicle IV.4, 1988.
24. ITU-T, Draft Recommendation G.804 - “ATM Cell Mapping into
Plesiochronous Digital Hierarchy (PDH)”, January 1993.
25. ITU-T, Draft Recommendation G.832 - “Transport of SDH Elements on PDH
Networks: Frame and Multiplexing Structures”, January 1993.
26. ETSI DE/TM-1015 - "Transmission and Multiplexing (TM); Generic Functional
Requirements for SDH Transmission Equipment, Part 1: Generic Processes
and Performance", Version 1.0, November, 1993.
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DATA SHEET
PMC-950449ISSUE 6MULTI-PHY USER NETWORK INTERFACE
28. ATM Forum, Level 1, V2.00 - “An ATM PHY Data Path Interface”, February
1994.
29. ATM Forum, Level 2, V0.8 - “UTOPIA, An ATM-PHY Interface Specification”,
April 1995.
30. PMC-Sierra, Inc., “(SCI-PHYTM) SATURN Compliant Interface For ATM PHY
Devices”, Issue 2, July 1994.
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4 APPLICATION EXAMPLES
Figure 1- Example 1. T1 or E1 Multi-PHY ATM UNI
1.544 MHz Transmit Reference Clock
DSX-1
or
E1
Analog
Interfaces
SCI-PHYTM
Multi-PHY
ATM Cell Bus
PM7344
S/UNI-MPH
Quad T1/E1
Multi-PHY
User Network Interface
PM4314
QDSX
Quad DSX-1/E1
Analog Line Interface
Generic
Microprocessor
Bus
Or 12.352 MHz
Crystal Oscillator Clock
37.056 MHz
Example 1 shows the PM7344 S/UNI-MPH used with the PM4314 QDSX to
implement a quad T1/E1 UNI where the DS1 or E1 signals are presented on
DSX-1 or E1 electrical interfaces.
In this example, the DSX-1 or E1 line interface functions are provided by the
QDSX and the DS1 or E1 framing functions are provided by the S/UNI-MPH.
Note that many other standard DSX-1 or E1 line interface devices are also
compatible with the S/UNI-MPH. The S/UNI-MPH also provides the ATM cell
processing functions associated with the PHY layer, including the implementation
of a SCI-PHY multi-PHY interface to the ATM layer device(s). The combination
of the QDSX device with the S/UNI-MPH allows both ANSI/ITU compliant DSX1/E1 analog signals and ATM Forum UNI 3.1 and ITU G.804 compliant DS1/E1
digital signals to be processed. The UNI 3.1 and G.804 specifications define
ATM cell mappings for a variety of transmission formats, including the 1.544
Mbit/s DS1 and the 2.048 Mbit/s E1 formats.
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Figure 2- Example 2. DS3 Port Carrying Multiplexed T1 or E1 ATM UNI
Signals
SCI-PHYTM
Multi-PHY
ATM Cell Bus
1.544 MHz
Transmit
Reference Clock
PM7344
S/UNI-MPH
Quad T1/E1
Multi-PHY
User Network Interface
PM7344
S/UNI-MPH
Quad T1/E1
Multi-PHY
User Network Interface
# 1
12.352 MHz
1.544 MHz
# 7
6.312 MHz
Optional Transmit
Reference Clock
PM8313
D3MX
Integrated M13
Multiplexer
44.736 MHz
Transmit
Reference Clock
DSX-3
Line Interface With
Clock Recovery
DSX-3
Analog
Interface
Generic
Microprocessor
Bus
Crystal Oscillator Clock
12.352 MHz
Example 2 shows seven PM7344 S/UNI-MPH devices used with a PM8313
D3MX device and a generic DSX-3 LIU device being used to implement a DS3
port where the DS3 carries a multiplex of DS1 (or E1) UNI signals.
In this example, each S/UNI-MPH provides four duplex DS1 signals to the D3MX
device which, in turn, performs the asynchronous multiplex and demultiplex
function required to map these into a DS3 signal. The D3MX may use the
traditional M23 format or may use the C-bit parity format when performing this
multiplex. Note that the D3MX may also be configured for G.747 multiplexing of
three E1 signals into each of the seven DS2 signals within the overall DS3
signal. Many generic DSX-3 line interface unit devices may be used with the
D3MX to implement a DSX-3 electrical interface on the high speed line side of
such a system. Each S/UNI-MPH device implements the T1 or E1 UNI function
for four T1 or E1 streams. The seven S/UNI-MPH devices may be serviced by a
common ATM layer device through a shared (SCI-PHY
TM
) multi-PHY bus.
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Figure 3- Example 3. Multi-PHY Addressing Application
Example 3 shows N (where N is a number from 1 to 8) PM7344 S/UNI-MPH
devices used with UTOPIA Level 2 compliant ingress and egress devices.
The S/UNI-MPH supports PHY address polling by sampling the two least
significant address bits (RRA[1:0] and TWA[1:0]) and generating the cell
available status for the selected PHY entity. It also holds the last state of
RRA[1:0] and TWA[1:0] before the assertion of RRDMPHB and TWRMPHB,
respectively, thus latching the PHY address resolved by the polling process. The
only support logic is that required to select between the S/UNI-MPH devices.
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Note that the oscillator can be at any frequency less than or equal to 25 MHz.
For the DS-1 case the data rate is 1.536 Mbits/s (1.544 Mbits/s * 192 payload
bits per frame / 193 bits per frame) for each DS-1 port. Thus, the aggregate
throughput is less than 6.144 Mbyte/s with 32 DS-1 ports; therefore, the clock
oscillator frequency can be as low as 6.5 MHz.
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