Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
7. 2. 40. TX_LOWER12_SCG_CONFIG
Address: 1F001Eh (7C0078h)
Read/Write
Function: Congestion configuration register for lower 12 (SC 2-7 and 10-15) Service Class
Group
Reset Value:0
Format:
Field (Bits)
Description
Not used
(31:16)
Write with a 0 to maintain future software compatibility.
TX_LWR8_EXP_MAX_QD
(15:12)
Maximum QD (exponent or alternate) for service class group 2-7 and 10-15. This
limit is enforced if TX_SCG_ENABLE=1.
TX_LWR8_EXP_CONG_QD
(11:8)
Congestion QD (exponent or alternate) for service class group 2-7 and 10-15. This
limit is enforced if TX_SCG_ENABLE=1.
Not used
(7:0)
Write with a 0 to maintain future software compatibility.
7. 2. 41. TX_LOWER12_SCG_STATE (Internal State)
Address: 1F001Fh (7C007Ch)
Read/Write
Function: Queue state for lower 12 (SC 2-7 and 10-15) Service Class Group
Reset Value:0
Format:
Field (Bits)
Description
Not used
(31:20)
Write with a 0 to maintain future software compatibility.
TX_LWR12_MAXED
(19)
This SCG is currently in max congestion. Resets to 0. READ-ONLY.
TX_LWR12_DECR_CONG
(18)
This queue depth for this service class group is currently larger than the queue depth
defined by one codepoint less than TX_LWR12_CONG_QD. Resets to 0. READ-
ONLY.
TX_LWR12_DEF_CONG
(17)
This queue depth for this service class group is currently larger than the queue depth
defined by TX_LWR12_CONG_QD. Resets to 0. READ-ONLY.
TX_LWR12_CONGESTED
(16)
This service class group is currently in congestion as defined by
TX_LWR12_CONG_QD, TX_HYSTERESIS_DISABLE, and
TX_ALTERNATE_ENCODE. Resets to 0. READ-ONLY.
RESERVED
(15)
Write with 0 each time SW_RESET is asserted to maintain future SW compatibility.
TX_LWR12_DATA
(14:0)
Current queue depth for this SCG. Initialize to 0000 each time SW_RESET is
asserted to maintain software compaitibility. Resets to 0000.
149
PMC [ PMC-SIERRA, INC ]
