S/UNI®-JET Data Sheet
Released
Register 322H: CPPM B1 Error Count LSB
Bit
Type
R
R
R
R
R
R
R
R
Function
B1E[7]
B1E[6]
B1E[5]
B1E[4]
B1E[3]
B1E[2]
B1E[1]
B1E[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 323H: CPPM B1 Error Count MSB
Bit
Type
R
R
R
R
R
R
R
R
Function
B1E[15]
B1E[14]
B1E[13]
B1E[12]
B1E[11]
B1E[10]
B1E[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
B1E[8]
B1E[15:0]
B1E[15:0] represents the number of PLCP bit interleaved parity (BIP) errors that have been
detected since the last time the B1 error 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 B1 Error 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. B1 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
123
PMC [ PMC-SIERRA, INC ]
