Released
PMC-Sierra, Inc.
PM9311/2/3/5 ETT1™ CHIP SET
Data Sheet
PMC-2000164
ISSUE 3
ENHANCED TT1™ SWITCH FABRIC
2.3.2.5 Interrupt Register
Symbol:
DIR
Address Offset: 00010h
Default Value: 00000000h
Access:
Read and Clear
Interrupt Register.
Bits
Description
31:24 Reserved.
8B/10B Decoder Error. This is set if a 10B character received from the fiber optics interface is
not a valid 8B/10B code as defined in the 8B/10B decoder lookup table.
23
Output Fifo Overflow. This is set if the EPP attempts to push a cell into the output fifo when it
is full. This output fifo can hold up to 4 cells. This is likely to be caused by incorrect
programming of the “1-in-N” counter on the EPP.
22
Input Fifo Overflow. This is set if the fiber optics receiver attempts to push a cell into the input
fifo when it is full. The input fifo can hold up to 8 cells. This is likely to be caused by a
malfunction in the “1-in-N” counter on the ingress linecard.
21
VCSEL Laser Active Up. This is set if the VCSEL laser array raises its normal operation
status.
20
19
18
17
16
15
14
13
VCSEL Laser Active Down. This is set if the VCSEL laser array drops its normal operation
status.
PIN Diode Signal Detect Up. This is set if the PIN diode receiver raises the detection of a
light stream from the fiber optical link.
PIN Diode Signal Detect Down. This is set if the PIN diode receiver drops the detection of a
light stream from the fiber optical link.
Transceiver Signal Detect Up. This is set if the transceiver raises the detection of a bit
stream from the fiber optics PIN diode receiver.
Transceiver Signal Detect Down. This is set if the transceiver drops the detection of a bit
stream from the fiber optics PIN diode receiver.
Transceiver Comma Detect. This is set if the transceiver indicates the detection of a comma
character “0011111xxx”.
8B/10B Decoder Comma Detect. This is set if the fiber optics receiver looks up a 10B control
character that maps to “0100000000” in the 8B/10B decoder lookup table.
Fiber Optics Egress Ready Up. This is set if the fiber optics receiver on the egress linecard
raises its ready status as a consequence of synchronization being locked on the 8B/10B control
sequences.
12
11
Fiber Optics Egress Ready Down. This is set if the fiber optics receiver on the egress
linecard drops its ready status as a consequence of synchronization being lost on the 8B/10B
control sequences.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
123
PMC [ PMC-SIERRA, INC ]
