DS2154 datasheet(42/87 Pages) DALLAS

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DS2154

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5.4 FAS Error Counter

FAS Count Register 1 (FASCR1) is the most significant word and FASCR2 is the least significant word

of a 12-bit counter that records word errors in the Frame Alignment Signal in timeslot 0. This counter is

disabled during loss of synchronization conditions, (RLOS = 1). Since the maximum FAS word error

count in a 1-second period is 4000, this counter cannot saturate.

FASCR1: FAS BIT COUNT REGISTER 1 (Address=02 Hex)

FASCR2: FAS BIT COUNT REGISTER 2 (Address=04 Hex)

(MSB)

(LSB)

FAS11

FAS10

FAS9

FAS8

FAS7

FAS6

(note 2)

FASCR1

FAS5

FAS4

FAS3

FAS2

FAS1

FAS0

(note 1)

FASCR2

SYMBOL

POSITION

NAME AND DESCRIPTION

FAS11

FASCR1.7

MSB of the 12-bit FAS error count.

FAS0

FASCR2.2

LSB of the 12-bit FAS error count.

NOTES:

1. The lower 2 bits of FASCR1 at address 02 are the most significant bits of the 10-bit CRC4 error

counter.

2. The lower 2 bits of FASCR2 at address 04 are the most significant bits of the 10-bit E-bit counter.

DS2154 bảng dữ liệu(PDF) 42 Page - Dallas Semiconductor