DS3172 datasheet(155/232 Pages) DALLAS

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as a zero followed by a BPV, and the first HDB3 signature is defined as two zeros followed by a BPV. All

subsequent B3ZS/HDB3 signatures will be determined by the setting of this bit.

Bit 0: Receive Zero Suppression Decoding Disable (RZSD) – When 0, the B3ZS/HDB3 Decoder performs zero

suppression (B3ZS or HDB3) and AMI decoding. When 1, zero suppression (B3ZS or HDB3) decoding is disabled,

and only AMI decoding is performed.

LINE.RSR

Line Receive Status Register

(0.2.4.6)94h

Bit #

Name

Bit #

Name

EXZC

BPVC

LOS

Bit 3: Excessive Zero Count (EXZC) – When 0, the excessive zero count is zero. When 1, the excessive zero

count is one or more.

Bit 1: Bipolar Violation Count (BPVC) – When 0, the bipolar violation count is zero. When 1, the bipolar violation

count is one or more.

Bit 0: Loss Of Signal (LOS) – When 0, the receive line is not in a loss of signal (LOS) condition. When 1, the

receive line is in an LOS condition. See Section 10.10.6.

Note: When zero suppression (B3ZS or HDB3) decoding is disabled, the LOS condition is cleared, and cannot be

detected

LINE.RSRL

Line Receive Status Register Latched

(0.2.4.6)96h

Bit #

Name

Bit #

Name

ZSCDL

EXZL

EXZCL

BPVL

BPVCL

LOSL

Bit 5: Zero Suppression Code Detect Latched (ZSCDL) – This bit is set when a B3ZS or HDB3 signature is

detected.

Bit 4: Excessive Zero Latched (EXZL) – This bit is set when an excessive zero event is detected on the incoming

bipolar data stream.

Bit 3: Excessive Zero Count Latched (EXZCL) – This bit is set when the LINE.RSR.EXZC bit transitions from

zero to one.

Bit 2: Bipolar Violation Latched (BPVL) – This bit is set when a bipolar violation (or E3 LCV if enabled) is

detected on the incoming bipolar data stream.

Bit 1: Bipolar Violation Count Latched (BPVCL) – This bit is set when the LINE.RSR.BPVC bit transitions from

zero to one.

Bit 0: Loss of Signal Change Latched (LOSL) – This bit is set when the LINE.RSR.LOS bit changes state.

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