PM7347 datasheet(125/341 Pages) PMC

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S/UNI®-JET Data Sheet

Released

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

125

Document ID: PMC-1990267, Issue 3

Bit

Type

Function

Default

Bit 7

FEBE[7]

Bit 6

FEBE[6]

Bit 5

FEBE[5]

Bit 4

FEBE[4]

Bit 3

FEBE[3]

Bit 2

FEBE[2]

Bit 1

FEBE[1]

Bit 0

FEBE[0]

Bit

Type

Function

Default

Bit 7

FEBE[15]

Bit 6

FEBE[14]

Bit 5

FEBE[13]

Bit 4

FEBE[12]

Bit 3

FEBE[11]

Bit 2

FEBE[10]

Bit 1

FEBE[9]

Bit 0

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.

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