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PM7347 Datasheet(PDF) 273 Page - PMC-Sierra, Inc

Part # PM7347
Description  SATURN USER NETWORK INTERFACE for J2/E3/T3
PDF  341 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM7347 Datasheet(HTML) 273 Page - PMC-Sierra, Inc

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S/UNI®-JET Data Sheet
Released
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
273
Document ID: PMC-1990267, Issue 3
Control
Transmit Operation
Receive Operation
X-bits:
Spare Bits
Inserts the spare bits via
register bits or via TOH and
TOHINS input pins.
Extracts and presents the x-bits on register
bits. The X-bit states can be debounced and
presented on the ROH output pin. An interrupt
change can be generated to signal a change in
the X-bit state.
A-bit:
Remote LOF Indication
Inserts the A-bit via register
bit. The A-bit can be
optionally be asserted when
the J2 framer is in LOF
condition.
Extracts and presents the A-bit on a register
bit. The A-bit state can be debounced and
presented on the ROH output pin. An interrupt
can be generated to signal a change in the A-
bit state.
E1-E5:
CRC-5 Check Sequence
Automatically calculates and
inserts the CRC-5 check
sequence.
Calculates the CRC-5 check sequence for the
received data stream. Discrepancies with the
received CRC-5 code can be configured to
generate an interrupt. CRC-5 errors are
accumulated in an internal counter.
13.8
S/UNI-JET Cell Data Structure
ATM cells may be passed to and from the S/UNI-JET using a 26-word or 27-word data structure
and a 52-byte or 53-byte word data structure. These data structures are shown in Figure 16,
Figure 17, Figure 18, and Figure 19.
Figure 16 16-bit Wide, 26-byte Word Structure
Bit 15
Bit 0
H1
H2
H3
H4
PAYLOAD1
PAYLOAD2
Bit 8
Bit 7
PAYLOAD3
PAYLOAD4
PAYLOAD5
PAYLOAD6
Word 1
Word 2
Word 3
Word 4
Word 5
PAYLOAD47
PAYLOAD48
Word 26



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