Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
Field (Bits)
Description
TX_CH_ALTERNATE_ENCODE
(16)
1
0
Enable TX_CH alternate congestion encoding. This set of values of the
TX_CH_EXP_MAX_QD and TX_CH_EXP_CONG_QD defines many
of the codepoints with higher values. This increases the resolution of the
congestion limits where they are used most of the time. The table is
shown in the text for RX_ALTERNATE_ENCODE.
Disable TX_CH alternate encoding. This setting uses the original set of
values which are approximately 2**N. The table is shown in the text for
RX_ALTERNATE_ENCODE.
TX_DISABLE_BP
(15)
1
0
Do not send BP to the switch fabric when the SC MC infifos are almost
full. Drop cells that are delivered to full queues. This prevents one
egress port from congesting the fabric through excessive BP.
Send BP to the switch fabric when the SC MC infifos are nearly full.
This setting allows the egress port to momentarity push back onto the
fabric when its INFIFO becomes full.
RESERVED
(13:14)
Write with a 0 to maintain future software compatibility.
DROP_ALL_TX_CELLS
(12)
1
0
Drop all cells received in the TX direction.
Normal operation.
RESERVED
(11)
Write with 0 to maintain future software compatibility.
DISABLE_D3
(10)
1
0
Disable the 3rd instance of the D process. The D process dequeues cells
to the UTOPIA.
Enable this process.
DISABLE_D2
(9)
1
0
Disable the 2nd instance of the D process.
Enable this process.
DISABLE_D1
(8)
1
0
Disable the 1st instance of the D process.
Enable this process.
DISABLE_O
(7)
1
0
Disable the the o process. The O process updates the TX CH statistics.
Enable this process.
RESERVED
(6)
Write with 0 to maintain future software compatibility.
DISABLE_M2
(5)
1
0
Disable the 2nd instance of the M process. The M process replicates the
multicast pointers.
Enable this process.
DISABLE_M1_3
(4)
1
0
Disable the 1st and 3rd instance of the M process.
Enable this process.
DISABLE_E4
(3)
1
Disable the 4th instance of the E process. The E process enqueues the
cells onto the data structures from the fabric. E4 is associated with
switch fabric port 3.
0
1
Enable this process.
DISABLE_E3
(2)
Disable the 3rd instance of the E process. E3 is associated with switch
fabric port 2.
0
1
Enable this process.
DISABLE_E2
(1)
Disable the 2nd instance of the E process. E2 is associated with switch
fabric port 1.
0
Enable this process.
130
PMC [ PMC-SIERRA, INC ]
