PM7312 pmc-sierra, PM7312 Datasheet - Page 236

• Manufacturer Part Number: PM7312
• Description: Freedm 32a1024l Assp Telecom Standard Datasheet
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2021833, Issue 2
Address
400
Any-PHY
CHANNEL #
(1024)
7FF
800
BFF
C00
FFF
Record
AP_ALLOC_
THR
OUTFMT_
FRPK
AP_CIOUT
AP_SEGSIZE
[1:0]
AP_NCHNKS
[18:0]
Bits
22:4
3
2
1:0
31:0
31:19
18:0
FREEDM 32A1024L ASSP Telecom Standard Product Data Sheet
Description
Any-PHY storage allocation threshold. Program this register
to the allowed number of chunks of storage above which
datagrams received for this Any-PHY channel will be
discarded. Note that this threshold will be verified only at the
start of every datagram (i.e., no datagram will be discarded if
its first chunk was accepted, even though subsequent chunks
may cause the Any-PHY storage allocation threshold to be
exceeded). Care must therefore be taken when defining Any-
PHY storage allocation thresholds to reserve (subtract)
enough headroom for storage of one additional datagram.
Output format (frame/packet or fragment).
0 – Frame/Packet
1 – Fragment
Any-PHY connection identifier output.
Set this bit to 1 to indicate that the connection identifier is to be
pre-pended to all datagram transfers across a downstream
Any-PHY interface. This bit will be overridden and forced to 1
when an erred datagram is received. It will be overridden and
forced to 0 when CUT_THRU is enabled on the Any-PHY
channel’s corresponding HDLC channel, even for erred
datagrams.
This bit should never be cleared when sequenced datagrams
are expected as this will cause an unexpected presence of
sequence number error.
Ingress Any-PHY channel output segment size (64, 128, or
256 bytes). Each channel must be programmed with the same
value.
00 – 64 bytes
01 – 128 bytes
10 – 256 bytes
11 – Unused
Reserved. Must be left at default or written to 0 for correct
operation.
Unused
Number of chunks stored in external chunk buffer
Released
236