Datasheet

DS26521 Single T1/E1/J1 Transceiver
190 of 258
Register Name:
TXPC
Register Description:
Transmit Expansion Port Control Register
Register Address:
18Ah
Bit # 7 6 5 4 3 2 1 0
Name — — — — — TBPDIR TBPFUS TBPEN
Default 0 0 0 0 0 0 0 0
Bit 2: Transmit BERT Port Direction Control (TBPDIR).
0 = Normal (line) operation. The transmit BERT port sources data into the transmit path.
1 = System (backplane) operation. The transmit BERT port sources data into the transmit path (RDATA).
In this mode the data out of the transmit BERT is muxed into the receive path at RDATA (the line side of
the elastic store).
Bit 1: Transmit BERT Port Framed/Unframed Select (TBPFUS).
0 = The transmit BERT will not clock data into the F-bit position (framed)
1 = The transmit BERT will clock data into the F-bit position (unframed)
Bit 0: Transmit BERT Port Enable (TBPEN).
0 = Transmit BERT port is not active
1 = Transmit BERT port is active