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PM9313 Datasheet(PDF) 69 Page - PMC-Sierra, Inc

Part # PM9313
Description  ENHANCED TT1??SWITCH FABRIC
PDF  343 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM9313 Datasheet(HTML) 69 Page - PMC-Sierra, Inc

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PM9311/2/3/5 ETT1™ CHIP SET
PMC-2000164
ISSUE 3
ENHANCED TT1™ SWITCH FABRIC
Released
Data Sheet
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
65
PMC-Sierra, Inc.
Table 3.
LCS Format from Linecard to Switch
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte 0
Request
Field
Req
Valid
Label_1 [13:7]
Byte 1
Label_1 [6:0]
Type_1
[3]
Byte 2
Type_1 [2:0]
Rsvd
Byte 3
Payload
Field
Payload
Valid
Seq_Number[9:3]
Byte 4
Seq_Number[2:0]
Rsvd
Byte 5
Hole Field
Payload_Hole_Request[3:0]
Rsvd
Byte 6
CRC Field
CRC-16[15:8]
Byte 7
CRC-16 [7:0]
Bytes 8-71 or
8-83
Payload
Payload Data
Table 4.
Definitions of LCS Fields from Linecard to Switch
Field
Size (bits)
Definition
Req Valid
1
Indicates that request field is valid (Request Label_1).
Label_1
14
Label that is being requested (e.g. unicast-QID/multicast-label/TDM-label).
Type_1
4
Segment type that is being requested (e.g. Control Packet).
Payload Valid
1
Indicates that the Payload Data field contains a valid payload.
Seq_Number
10
A sequence number for synchronizing grants with payloads.
Payload_Hole_
Request
4
Request for a “hole” in the payload stream from switch to linecard. (Priority 3,2,1,0 for bits
[3:0], respectively.) (See Section 1.2.4 “End-to-End Flow Control” on page 22 for
explanation).
CRC-16
16
16-bit CRC calculated over complete 64-bit prepend.a
a. See Section 1.6.4.1 “Use of CRC-16 Field” on page 73 for details of CRC calculation and Section 3.4.2.2 “Reset and
Control” on page 169, bit 4.
Payload Data
64 or 76
bytes
Payload Data



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