Datasheet

DS2155
53 of 238
Register Name:
INFO1
Register Description:
Information Register 1
Register Address:
10h
Bit # 7 6 5 4 3 2 1 0
Name RPDV TPDV COFA 8ZD 16ZD SEFE B8ZS FBE
Default 0 0 0 0 0 0 0 0
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.