
PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE
139
Register 01FH, 11FH, 21FH, 31FH: PMON FEBE/J2-EXZS Event Count MSB
Bit
Type
Function
Default
Bit 7
Unused
X
Bit 6
Unused
X
Bit 5
R
FEBE/J2-EXZS[13]
X
Bit 4
R
FEBE/J2-EXZS[12]
X
Bit 3
R
FEBE/J2-EXZS[11]
X
Bit 2
R
FEBE/J2-EXZS[10]
X
Bit 1
R
FEBE/J2-EXZS[9]
X
Bit 0
R
FEBE/J2-EXZS[8]
X
FEBE/J2-EXZS[13:0]:
FEBE/J2-EXZS[13:0] represents the number of DS3 or E3 G.832 far end
block errors that have been detected since the last time the FEBE error
counter was polled.
In J2 mode, FEBE/J2-EXZS[13:0] represents the number of Excessive Zeros
(EXZS is a string of 8 or more consecutive zeros) that have occurred during
the previous accumulation interval.
The counter (and all other counters in the PMON) is polled by writing to any
of the PMON register addresses (x14H to x1FH) or to the S/UNI-QJET
Identification, Master Reset, and Global Monitor Update register (006H).
Such a write transfers the internally accumulated count to the FEBE Event
Count Registers and simultaneously resets the internal counter to begin a
new cycle of error accumulation. This transfer and reset is carried out in a
manner that coincident events are not lost. The transfer takes 255 RCLK[x]
cycles to complete in DS3 mode and 3 RCLK[x] cycles to complete in E3 and
J2 mode.
This counter is paused when the corresponding framer has lost frame
alignment.