PM7311 pmc-sierra, PM7311 Datasheet - Page 252

• Manufacturer Part Number: PM7311
• Description: Freedm 84a1024l Assp Telecom Standard Datasheet
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2021832, Issue 2
11.2.7
Connection Context (CC) Memory Map
This memory holds connection configuration for both Ingress (RX) and Egress (Tx). This
external memory can be read or written with any value for test purposes before Traffic is enabled.
The contents of the memory must be left in the state described below for correct operation. A
connection’s data may be read but not written to once traffic is present on the connection. Each
connection contains of 16 32-bit records (W15-W0). When writing to word 0 to set up a Rx
connection, words 1-3 must also be written to the value 0. Addressing per CI is described as
follows:
Table 48 Connection Context Memory Addressing
Table 49 CC Memory Map
Address
00000
CI#*16words
(16x16K)
(con’t)
RAM Address
00000
00001
…
0000F
00010
00011
…
0001F
3FFF0
3FFF1
…
3FFFF
Record
Tx Unused
TX_HDR_
SZ[1:0]
TX_FRAG_
MODE[1:0]
TX_FRAG_
SIZE[1:0]
TX_SUB_CH_
NUM[3:0]
CI #
0000
0000
…
0000
0001
0001
…
0001
3FFF
3FFF
…
3FFF
Word:Bits
W15:31:10
W15:9:8
W15:7:6
W15:5:4
W15:3:0
FREEDM 84A1024L ASSP Telecom Standard Product Data Sheet
Word
W0
W1
…
W15
W0
W1
…
W15
W0
W1
…
W15
Description
X
Transmit Fragmentation Header
00 - Short sequence
01 - Short sequence with class(PPP)
10 - Long sequence (PPP)
11 - Long sequence with class (PPP)
Tx Fragmentation Mode
00 – Add Fragment Header
01 – Reserved
10 – Non sequenced
11 - Unused
Fragmentation size
00 – 128
01 – 256
10 – 512
11 – packet
Tx Sub-channel number. Defines the offset/index of a
member channel within a multi-link group that is to be
selected.
Released
252