PM7344 S/UNI-MPH
DATA SHEET
PMC-950449
ISSUE 6
MULTI-PHY USER NETWORK INTERFACE
Registers 065H, 165H, 265H and 365H: RXCP Uncorrectable HCS Error
Event Count MSB
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
Unused
Unused
X
X
X
X
X
X
X
X
Unused
R
R
R
R
UHCSE[11]
UHCSE[10]
UHCSE[9]
UHCSE[8]
UHCSE[11:0]:
UHCSE[11:0] represents the number of uncorrectable header check
sequence (UHCS) errors that have been detected since the last time the
UHCSE error counter was polled. The counter (and all other counters in the
S/UNI-MPH) is polled by writing to the Global Monitoring register (00CH).
Such a write transfers the internally accumulated count to the UHCSE Error
Count Registers and simultaneously resets the internal counter to begin a
new cycle of error accumulation. The transfer in progress (TIP) bit in register
00CH is polled to determine when the transfer is complete. The CPPM
counters in each quadrant can also be polled by writing to any address from
X60H to X6FH (where X is a value from 0 to 3). UHCS errors are not
accumulated when the RXCP has declared an out of cell delineation defect
state.
Note that every time that the RXCP loses cell delineation and goes from the
SYNC state to the HUNT state (see the Cell Delineation State Diagram
located in the Receive ATM Cell Processor (RXCP) Functional Description
section), the UHCSE counter will lose 1 occurance of an UHCSE (eg. UHCSE
count will be 6 instead of 7 on 1 transition to the HUNT state).
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
173
PMC [ PMC-SIERRA, INC ]
