![](http://datasheet.mmic.net.cn/330000/PM73487-PI_datasheet_16444394/PM73487-PI_156.png)
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATMTraffic Management Device
Released
Datasheet
144
7. 2. 30. RX_LOWER16_SCG_CONFIG
Address: 1F0014
h
(7C0050
h
)
Read/Write
Function:
Congestion configuration register for lower 16 (SC 24-31 and SC 56-63) Service
Class Group
Reset Value:0
Format:
7. 2. 31. RX_LOWER16_SCG_STATE (Internal State)
Address: 1F0015
h
(7C0054
h
)
Read/Write
Function:
Queue state for lower 16 (SC 24-31 and SC 56-63) Service Class Group
Reset Value:0
Format:
Field (Bits)
Description
Not used
(31:16)
Write with a 0 to maintain future software compatibility.
RX_LWR16_EXP_MAX_QD
(15:12)
Maximum QD (exponent or alternate) for service class group 24-31 and 56-63. This
limit is enforced if RX_SCG_ENABLE=1.
RX_LWR16_EXP_CONG_QD
(11:8)
Congestion QD (exponent or alternate) for service class group 24-31 and 56-63.
This limit is enforced if RX_SCG_ENABLE=1.
Not used
(7:0)
Write with a 0 to maintain future software compatibility.
Field (Bits)
Description
Not used
(31:20)
Write with a 0 to maintain future software compatibility.
RX_LWR16_MAXED
(19)
This SCG is currently in max congestion. Resets to 0. READ-ONLY.
RX_LWR16_DECR_CONG
(18)
This queue depth for this service class group is currently larger than the queue depth
defined by one codepoint less than RX_LWR16_CONG_QD. Resets to 0. READ-
ONLY.
RX_LWR16_DEF_CONG
(17)
This queue depth for this service class group is currently larger than the queue depth
defined by RX_LWR16_CONG_QD. Resets to 0. READ-ONLY.
RX_LWR16_CONGESTED
(16)
This service class group is currently in congestion as defined by
RX_LWR16_CONG_QD, RX_HYSTERESIS_DISABLE, and
RX_ALTERNATE_ENCODE. Resets to 0. READ-ONLY.
RESERVED
(15)
Write with 0 each time SW_RESET is asserted to maintain future SW compatibility.
RX_LWR16_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.