S/UNI®-JET Data Sheet
Released
Register 326H: CPPM FEBE Count LSB
Bit
Type
R
R
R
R
R
R
R
R
Function
FEBE[7]
FEBE[6]
FEBE[5]
FEBE[4]
FEBE[3]
FEBE[2]
FEBE[1]
FEBE[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 327H: CPPM FEBE Count MSB
Bit
Type
R
R
R
R
R
R
R
R
Function
FEBE[15]
FEBE[14]
FEBE[13]
FEBE[12]
FEBE[11]
FEBE[10]
FEBE[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
FEBE[8]
FEBE[15:0]
FEBE[15:0] represents the number of PLCP FEBEs (FEBE) that have been detected since the
last time the FEBE 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 FEBE 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. FEBE 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
125
PMC [ PMC-SIERRA, INC ]
