Rainbow Electronics DS21458 - Manual (Page 124)

DS21455/DS21458 Quad T1/E1/J1 Transceivers
124 of 270
Register Name:
BOCC
Register Description: BOC Control Register
Register Address: 37h
Bit
# 7 6 5 4 3 2 1 0
Name — — — RBOCE RBR RBF1 RBF0 SBOC
Default 0 0 0 0 0 0 0 0
Bit 0/Send BOC (SBOC). Set = 1 to transmit the BOC code placed in bits 0 to 5 of the TFDL register.
Bits 1 to 2/Receive BOC Filter Bits (RBF0, RBF1). The BOC filter sets the number of consecutive patterns that must be
received without error prior to an indication of a valid message.
RBF1 RBF0
CONSECUTIVE BOC CODES FOR VALID SEQUENCE
IDENTIFICATION
0 0 None
0 1 3
1 0 5
1 1 7
Bit 3/Receive BOC Reset (RBR). A 0 to 1 transition will reset the BOC circuitry. Must be cleared and set again for a
subsequent reset.
Bit 4/Receive BOC Enable (RBOCE). Enables the receive BOC function. The RFDL register will report the received BOC
code.
0 = receive BOC function disabled
1 = receive BOC function enabled. The RFDL register will report BOC messages
Bit 5/Unused, must be set to zero for proper operation.
Bit 6/Unused, must be set to zero for proper operation.
Bit 7/Unused, must be set to zero for proper operation.