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PM7346 Datasheet(PDF) 165 Page - PMC-Sierra, Inc

Part # PM7346
Description  SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
PDF  419 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM7346 Datasheet(HTML) 165 Page - PMC-Sierra, Inc

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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 144
Register 025H, 125H, 225H, 325H: CPPM Framing Error Event Count MSB
Bit
Type
Function
Default
Bit 7
Unused
X
Bit 6
Unused
X
Bit 5
Unused
X
Bit 4
Unused
X
Bit 3
R
FE[11]
X
Bit 2
R
FE[10]
X
Bit 1
R
FE[9]
X
Bit 0
R
FE[8]
X
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 (x22H - x2FH). 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-QJET has declared a PLCP loss of frame defect state.



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