PM7346 Datasheet, PDF (154/419 Pages) PMC-Sierra, Inc – SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3

DATASHEET
PMC-960835
ISSUE 6
PM7346 S/UNI-QJET
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
Register 019H, 119H, 219H, 319H: PMON Excessive Zero Count MSB
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Type
R
R
R
R
R
R
R
R
Function
EXZS[15]
EXZS[14]
EXZS[13]
EXZS[12]
EXZS[11]
EXZS[10]
EXZS[9]
EXZS[8]
Default
X
X
X
X
X
X
X
X
EXZS[15:0]:
In DS3 mode, EXZS[15:0] represents the number of summed Excessive
Zeros (EXZS) that occurred during the previous accumulation interval. One
or more excessive zeros occurrences within an 85 bit DS3 information block
is counted as one summed excessive zero. Excessive zeros are accumulated
by this register only when the EXZSO and EXZDET are logic 1 in the DS3
FRMR Additional Configuration Register. This register accumulates summed
line code violations when the EXZSO is logic 0. The count of summed line
code violations is defined as the number of DS3 information blocks (85 bits)
that contain one or more line code violations since the last time the summed
LCV counter was polled.
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 EXZS 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 a maximum of 500 RCLK[x] cycles to
complete in G.832 E3 mode.
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 133