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____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
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Register Name:
RLS2-T1
Register Description:
Receive Latched Status Register 2 (T1 Mode)
Register Address:
base address + 0x244
Bit #
7
6
5
4
3
2
1
0
Name
RPDV
-
COFA
8ZD
16ZD
SEFE
B8ZS
FBE
Default
0
Note: This register has an alternate definition for E1 mode. See
RLS2-E1.
None of the bits in the register can cause an interrupt request.
Bit 7: Receive Pulse Density Violation Event (RPDV). This latched status bit is set to 1 when the receive data
stream does not meet the ANSI T1.403 requirements for pulse density. It is cleared when written with a 1.
Bit 5: Change of Frame Alignment Event (COFA). This latched status bit is set to 1 when the last frame resync
resulted in a change of frame or multiframe alignment. It is cleared when written with a 1.
Bit 4: Eight Zero Detect Event (8ZD). This latched status bit is set to 1 when a string of at least eight consecutive
zeros (regardless of the length of the string) has been received at RPOS and RNEG. It is cleared when written with
a 1.
Bit 3: Sixteen Zero Detect Event (16ZD). This latched status bit is set to 1 when a string of at least sixteen
consecutive zeros (regardless of the length of the string) has been received at RPOS and RNEG. It is cleared
when written with a 1.
Bit 2: Severely Errored Framing Event (SEFE). This latched status bit is set to 1 when 2 out of 6 framing bits (Ft
or FPS) are received in error. It is cleared when written with a 1.
Bit 1: B8ZS Codeword Detect Event (B8ZS). This latched status bit is set to 1 when a B8ZS codeword is
detected at RPOS and RNEG independent of whether the B8ZS mode is selected or not. Useful for automatically
setting the line coding. It is cleared when written with a 1.
Bit 0: Frame Bit Error Event (FBE). This latched status bit is set to 1 when an Ft (D4) or FPS (ESF) framing bit is
received in error. It is cleared when written with a 1.
Register Name:
RLS2-E1
Register Description:
Receive Latched Status Register 2 (E1 Mode)
Register Address:
base address + 0x244
Bit #
7
6
5
4
3
2
1
0
Name
-
CRCRC
CASRC
FASRC
RSA1
RSA0
RCMF
RAF
Default
0
Note: This register has an alternate definition for E1 mode. See
RLS2-T1.Bit 6: CRC Resync Criteria Met Event (CRCRC). This latched status bit is set to 1 when 915 out 1000 codewords
are received in error. It is cleared when written with a 1. This bit cannot cause an interrupt request.
Bit 5: CAS Resync Criteria Met Event (CASRC). This latched status bit is set to 1 when 2 consecutive CAS MF
alignment words are received in error. It is cleared when written with a 1. This bit cannot cause an interrupt
request.
Bit 4: FAS Resync Criteria Met Event (FASRC). This latched status bit is set to 1 when 3 consecutive FAS words
are received in error. It is cleared when written with a 1. This bit cannot cause an interrupt request.
Bit 3: Receive Signaling All Ones Event (RSA1). This latched status bit is set to 1 when the contents of timeslot
16 contain less than three zeros over 16 consecutive frames. This alarm is not disabled in the CCS signaling mode.