MT9072AB datasheet(130/275 Pages) ZARLINK

130 / 275 page

MT9072

Data Sheet

130

Zarlink Semiconductor Inc.

Bit

Name

Functional Description

15-0

FC15 - 0

Framing Bit Error Counter. This 16 bit counter will be incremented for each error in the

received framing pattern. In ESF mode the ESF framing bits are monitored. In D4 mode the

counter reflects the combination of Ft and Fs errors. The count is only active if the Framer

is in synchronization.

Table 86 - Framing Bit Error Counter(Y17) (T1)

Bit

Name

Functional Description

15-0

BPV15-0

BPV Counter. 16 bit counter that is incremented for every bipolar violation error received.

Table 87 - Bipolar Violation Counter(Y18) (T1)

Bit

Name

Functional Description

15-0

CC15-0 CRC-6 Error Counter Bits 15 to Zero. These are the 16 bits of the CRC-6 error counter. This

is only relevant in the ESF Mode. This counter increments for every CRC-6 error.

Table 88 - CRC-6 Error Counter(Y19) (T1)

Bit

Name

Functional Description

15-8

OOF7 - 0 Out Of Frame Counter. This eight bit counter is incremented with every loss of receive

frame synchronization. Hence if you loss sync, gain sync and loss it again the counter will

have a value of 2.

7-0

COFA7 - 0 Change of Frame Alignment Counter. This eight bit counter is incremented if a

resynchronization is done which results in a shift in the frame alignment position.

Table 89 - Out of Frame and Change of Frame Counters(Y1A) (T1)

Bit

Name

Functional Description

15-8

not used.

7 - 0

EXZ7-0 Excessive Zero Counter. This counter is incremented once for detection of 8 or more zeros if

B8ZS is turned on. This counter is incremented once if 16 or more zeros are detected if B8ZS

is turned off. This counter counts groups of 8 or more or 16 or more zeros separated by ones.

Table 90 - Excessive Zero Counters(Y1B) (T1)

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