DS2152 datasheet(39/94 Pages) DALLAS

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DS2152

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5.1 Line Code Violation Count Register (LCVCR)

Line Code Violation Count Register 1 High (LCVCR1) is the most significant word and LCVCR2 is the

least significant word of a 16-bit counter that records code violations (CVs). CVs are defined as Bipolar

Violations (BPVs) or excessive 0s. See Table 5.1 for details of exactly what the LCVCRs count. If the

B8ZS mode is set for the receive side via CCR2.2, then B8ZS code words are not counted. This counter is

always enabled; it is not disabled during receive loss of synchronization (RLOS=1) conditions.

LCVCR1: LINE CODE VIOLATION COUNT REGISTER 1 (Address=23 Hex)

LCVCR2: LINE CODE VIOLATION COUNT REGISTER 2 (Address=24 Hex)

(MSB)

(LSB)

LCV15

LCV14

LCV13

LCV12

LCV11

LCV10

LCV9

LCV8

LCVCR1

LCV7

LCV6

LCV5

LCV4

LCV3

LCV2

LCV1

LCV0

LCVCR2

SYMBOL

POSITION

NAME AND DESCRIPTION

LCV15

LCVCR1.7

MSB of the 16-bit code violation count

LCV0

LCVCR2.0

LSB of the 16-bit code violation count

LINE CODE VIOLATION COUNTING ARRANGEMENTS Table 5-1

COUNT EXCESSIVE 0S?

(RCR1.7)

B8ZS ENABLED?

(CCR2.2)

WHAT IS COUNTED

IN THE LCVCRs

BPVs

yes

BPVs + 16 consecutive 0s

yes

BPVs (B8ZS code words not counted)

yes

BPVs + 8 consecutive 0s

5.2 Path Code Violation Count Register (PCVCR)

When the receive side of the DS2152 is set to operate in the ESF framing mode (CCR2.3=1), PCVCR

will automatically be set as a 12-bit counter that will record errors in the CRC6 code words. When set to

operate in the D4 framing mode (CCR2.3=0), PCVCR will automatically count errors in the Ft framing

bit position. Via the RCR2.1 bit, the DS2152 can be programmed to also report errors in the Fs framing

bit position. The PCVCR will be disabled during receive loss of synchronization (RLOS=1) conditions.

See Table 5-2 for a detailed description of exactly what errors the PCVCR counts.

PCVCR1: PATH VIOLATION COUNT REGISTER 1 (Address=25 Hex)

PCVCR2: PATH VIOLATION COUNT REGISTER 2 (Address=26 Hex)

(MSB)

(LSB)

(note 1)

CRC/FB11

CRC/FB10

CRC/FB9

CRC/FB8

PCVCR1

CRC/FB7

CRC/FB6

CRC/FB5

CRC/FB4

CRC/FB3

CRC/FB2

CRC/FB1

CRC/FB0

PCVCR2

SYMBOL

POSITION

NAME AND DESCRIPTION

CRC/FB11

PCVCR1.3

MSB of the 12-Bit CRC6 Error or Frame Bit Error Count

(note #2)

CRC/FB0

PCVCR2.0

LSB of the 12-Bit CRC6 Error or Frame Bit Error Count

(note #2)

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