Bt8370/8375/8376
3.15 Bit-Oriented Protocol Registers
Fully Integrated T1/E1 Framer and Line Interface
0A2—Receive BOP Codeword (RBOP)
7
6
5
4
3
2
1
0
RBOP_LOST
RBOP_VALID
RBOP[5]
RBOP[4]
RBOP[3]
RBOP[2]
RBOP[1]
RBOP[0]
RBOP_LOST
RBOP_VALID
Previous Message Overwritten—Activated when RBOP is updated and RBOP_VALID is
already set, indicating the previous codeword was never read by the processor.
0 = no error
1 = prior codeword lost
RBOP Message Valid—Set each time RBOP[5:0] is updated with a codeword value. Reading
from RBOP clears RBOP_VALID.
0 = no message or message read
1 = new RBOP message received
RBOP[5]
RBOP[4]
RBOP[3]
RBOP[2]
RBOP[1]
RBOP[0]
Sixth bit received
Fifth bit received
Fourth bit received
Third bit received
Second bit received
Receive BOP codeword, first bit received
0A3—BOP Status (BOP_STAT)
Real-time status of the BOP transmitter and receiver are reported primarily for diagnostic purposes.
7
6
5
4
3
2
1
0
TBOP_ACTIVE RBOP_ACTIVE
—
—
—
—
—
—
TBOP_ACTIVE
RBOP_ACTIVE
TBOP Active—Remains set for the entire length of a message as defined by TBOP_LEN[1:0]
[addr 0A0].
RBOP Active—If RBOP_LEN [addr 0A0] is programmed to 10 or 25, RBOP_ACTIVE is set
at the end of the first pattern and held active until the desired number of patterns is detected.
The RBOP interrupt is then generated. RBOP_ACTIVE does not toggle when RBOP_LEN is
programmed to 1.
3-90
Conexant
N8370DSE
CONEXANT [ CONEXANT SYSTEMS, INC ]
