PM7311 pmc-sierra, PM7311 Datasheet - Page 246

• 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
11.2.5
Re-Sequence Structures (RS) Memory Map
This external memory can be read or written with any value for test purposes before Functional
Mode (FUNC_MODE) in the RS_DRAMC Status and Control Register is enabled. The contents
of the memory must be left in the state described below for correct operation. ECC Protection
can be enabled in the RS_DRAMC Status and Control Register. If ECC is enabled, bits 31-24 are
overwritten with the ECC value. If ECC is disabled, bits 31-24 are written with the data
presented.
Table 39 RS Memory Map
Address
000000
(HDLC#
x 4096
= 4M)
Record
CI_LOOKUP
Bits
31:0
FREEDM 84A1024L ASSP Telecom Standard Product Data Sheet
Description
Connection Identifier Lookup record. This record must be
populated according to the record description below. All unused
locations must be set to a default connection identifier. Whenever a
connection is de-commissioned, the location must be written with a
default connection identifier. A Unique CI must be used for each
Any-PHY channel. All CI’s in an Any-PHY channel must be torn
down before an Any-PHY channel is torn down. The connection
Identifier lookup address is generated as follows:
Bits 23:22 – 0
Bits 21:12 – HDLC CH number or Any-PHY CH number
Bits 11:10 – 00 – Sequenced or Transparent Mode
Bits 9:0 –
A sequenced CI lookup record consists of up to 1024 entries per
HDLC or Any-PHY channel. In frame relay, 1024 unique DLCI
numbers can be mapped to 1-to-1024 CI numbers. In PPP, 16 COS
numbers can be mapped to 1-to-16 CI numbers. The choice of
whether to use HDLC or Any-PHY channel numbers for the CI lookup
is at the discretion of the user and is controlled by the
CI_LOOKUP_CHAN bit in register 0x020. If HDLC channel-based
lookup is selected, then for each sequenced connection in an HDLC
bundle, the same CI must be set up for each HDLC#. See Table 40
for details. This format is also used for transparent mode operation, in
which case the address bits 9:0 must be set to 0.
A non-sequenced CI lookup record consists of up to 1024 entries per
HDLC channel. (For non-sequenced CI lookup, bits [21:12] of the
lookup key are interpreted as an HDLC channel number regardless of
the setting of the CI_LOOKUP_CHAN bit.) In frame relay, 1024
unique DLCI numbers can be mapped to 1-to-1024 CI numbers. In
PPP, each channel is mapped to 1 non-sequenced CI number. See
Table 41 for details.
A control CI lookup record consists of 1 entry per HDLC channel. (For
control CI lookup, bits [21:12] of the lookup key are interpreted as an
HDLC channel number regardless of the setting of the
CI_LOOKUP_CHAN bit.) In multi-link frame relay an active control
bit in the frame header results in an index to the CI present in this
record In single or multi-link PPP an active NCP or LCP bit in the
packet header results in an index to the CI present in this record. For
Single Link FR, control packets are identified by DLCI and these
01 – Non-sequenced
10 – Control (ML_FR, ML_PPP, SL_PPP)
11 – Corrupt
non-sequenced).
DLCI or COS otherwise (although COS=0 if
0 for Corrupt, Control or Transparent Mode.
Released
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