Released
PMC-Sierra, Inc.
PM9311/2/3/5 ETT1™ CHIP SET
Data Sheet
PMC-2000164
ISSUE 3
ENHANCED TT1™ SWITCH FABRIC
For Multicast traffic: Each request count is 10 bits wide if OC-192c, 8 bits wide if OC-48. Each request
count corresponds to a FIFO in Linecard Multicast Tag FIFO Memory; if the request count is changed by
OOB, the FIFO length also changes. OOB should specify a new head address for the FIFO in the upper
data bits. OOB should also write the correct number of tags into the Linecard Multicast Tag FIFO memory
so that the state of the request counter and its tag FIFO are consistent.
Address
Bits
Description
19:15 Must be set to 0x1
14:13 Source Subport
12:11 Must be set to 0x3 for Multicast Traffic type
10:9
8:0
Priority
Must be set to 0
Data
Bits
Description
31:20 Reserved.
19:10 Linecard Multicast Tag Head
9:0
Request Count
For TDM traffic: Each request count is 10 bits wide if OC-192c, 8 bits wide if OC-48. Each request count
corresponds to a FIFO in Linecard TDM Tag FIFO Memory; if the request count is changed by OOB, the
FIFO length also changes. OOB should specify a new head address for the FIFO in the upper data bits.
OOB should also write the correct number of tags into the Linecard TDM Tag FIFO memory so that the
state of the request counter and its tag FIFO are consistent.
Address
Bits
Description
19:15 Must be set to 0x1
14:13 Source Subport
12:9
8:4
3:2
1:0
Must be set to 0x7 for TDM Traffic type
Must be set to 0
Destination Subport
Must be set to 0
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
199
PMC [ PMC-SIERRA, INC ]
