Rainbow Electronics DS21458 User Manual
Page 170
DS21455/DS21458 Quad T1/E1/J1 Transceivers
170 of 270
Register Name:
INFO2
Register Description:
Information Register 2
Register Address:
11h
Bit
# 7 6 5 4 3 2 1 0
Name BSYNC
BD TCLE
TOCD RL3 RL2 RL1 RL0
Default
0 0 0 0 0 0 0 0
Bits 0 to 3/Receive Level Bits (RL0 to RL3). Real-time bits.
RL3 RL2 RL1 RL0
RECEIVE LEVEL
(dB)
0 0 0 0 Greater
than
-2.5
0 0 0 1 -2.5
to
-5.0
0 0 1 0 -5.0
to
-7.5
0 0 1 1 -7.5
to
-10.0
0 1 0 0 -10.0
to
-12.5
0 1 0 1 -12.5
to
-15.0
0 1 1 0 -15.0
to
-17.5
0 1 1 1 -17.5
to
-20.0
1 0 0 0 -20.0
to
-22.5
1 0 0 1 -22.5
to
-25.0
1 0 1 0 -25.0
to
-27.5
1 0 1 1 -27.5
to
-30.0
1 1 0 0 -30.0
to
–32.5
1 1 0 1 -32.5
to
-35.0
1 1 1 0 -35.0
to
-37.5
1 1 1 1 Less
than
-37.5
Bit 4/Transmit Open-Circuit Detect (TOCD). A real-time bit set when the device detects that the TTIP and TRING outputs
are open-circuited.
Bit 5/Transmit Current Limit Exceeded (TCLE). A real-time bit set when the 50mA (RMS) current limiter is activated,
whether the current limiter is enabled or not.
Bit 6/BOC Detected (BD). A real-time bit that is set high when the BOC detector is presently seeing a valid sequence and set
low when no BOC is currently being detected.
Bit 7/BERT Real-Time Synchronization Status (BSYNC). Real-time status of the synchronizer (this bit is not latched). Will
be set when the incoming pattern matches for 32 consecutive bit positions. Will be cleared when six or more bits out of 64 are
received in error. Refer to BSYNC in the BERT status register, SR9, for an interrupt-generating version of this signal.