DS2155 datasheet(53/238 Pages) DALLAS

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DS2155

53 of 238

INFO1

Information Register 1

10h

Bit #

Name

RPDV

TPDV

COFA

8ZD

16ZD

SEFE

B8ZS

FBE

Default

Bit 0/Frame Bit-Error Event (FBE). Set when an Ft (D4) or FPS (ESF) framing bit is received in error.

Bit 1/B8ZS Codeword Detect Event (B8ZS). Set when a B8ZS codeword is detected at RPOS and RNEG

independent of whether the B8ZS mode is selected or not by T1TCR2.7. Useful for automatically setting the line

coding.

Bit 2/Severely Errored Framing Event (SEFE). Set when two out of six framing bits (Ft or FPS) are received in

error.

Bit 3/Sixteen Zero-Detect Event (16ZD). Set when a string of at least 16 consecutive 0s (regardless of the length

of the string) have been received at RPOSI and RNEGI.

Bit 4/Eight Zero-Detect Event (8ZD). Set when a string of at least eight consecutive 0s (regardless of the length

of the string) have been received at RPOSI and RNEGI.

Bit 5/Change-of-Frame Alignment Event (COFA). Set when the last resync resulted in a change-of-frame or

multiframe alignment.

Bit 6/Transmit Pulse-Density Violation Event (TPDV). Set when the transmit data stream does not meet the

ANSI T1.403 requirements for pulse density.

Bit 7/Receive Pulse-Density Violation Event (RPDV). Set when the receive data stream does not meet the ANSI

T1.403 requirements for pulse density.

DS2155 Datasheet(PDF) 53 Page - Dallas Semiconductor