S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Receive ATM Congestion Count Register (MEM_SELECT=0xD)
Purpose: Contains a global count of the number of cells dropped due to Receive Cell Interface
congestion. RDAT increments this counter and sets one of the Receive ATM Congestion Status
bits each time it drops a cell.
Usage: Global.
Maintained by: RDAT.
Record Size: one word.
MEM_ADDR is not used for accesses to this register.
Table 30 Receive ATM Congestion Count Register
Bits
31:0
Parameter
cong_count
Description
Count of the total number of cells dropped due to ATM congestion.
Register 0x308: RDAT Configuration
Bit
15
14:9
8
7:5
4:2
1:0
Type
R/W
Function
RDAT_ENABLE
Unused
IMA_IDLE_FWD_EN
GAMMA
Default
0
0
0
1
2
2
R/W
R/W
R/W
R/W
BETA
ALPHA
ALPHA
ALPHA represents the number of consecutive invalid ICP cells that will cause the IFSM to
transition from the IMA Sync state to the IMA Hunt state.
Value
0
Definition
Undefined
1-2
Number of consecutive invalid ICP
cells
3
Undefined
BETA
BETA represents the number of consecutive errored ICP cells that will cause the IFSM to
transition from the IMA Sync state to the IMA Hunt state.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
228
PMC [ PMC-SIERRA, INC ]
