S/UNI®-JET Data Sheet
Released
Register 324H: CPPM Framing Error Event Count LSB
Bit
Type
R
R
R
R
R
R
R
R
Function
FE[7]
FE[6]
FE[5]
FE[4]
FE[3]
FE[2]
FE[1]
FE[0]
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
X
X
X
X
X
Register 325H: CPPM Framing Error Event Count MSB
Bit
Type
Function
Unused
Unused
Unused
Unused
FE[11]
FE[10]
FE[9]
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
X
X
X
X
X
R
R
R
R
FE[8]
FE[11:0]
FE[11:0] represents the number of PLCP framing pattern octet errors and path overhead
identification octet errors that have been detected since the last time the framing error event
counter was polled. The counter (and all other counters in the CPPM) is polled by writing to
any of the CPPM register addresses (322H – 32FH). Such a write transfers the internally
accumulated count to the Framing Error Event Count Registers and simultaneously resets the
internal counter to begin a new cycle of error accumulation. This transfer occurs within 67
RCLK periods (1.5 µs for the DS3 bit rate; 1.95µs for the E3 bit rate) of the write. The
transfer and reset is carried out in a manner that coincident events are not lost. Framing error
errors are not accumulated when the S/UNI-JET has declared a PLCP LOF defect state.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
124
PMC [ PMC-SIERRA, INC ]
