Datasheet

DS26514 4-Port T1/E1/J1 Transceiver
19-5856; Rev 4; 5/11 222 of 305
Register Name:
TXPC
Register Description:
Transmit Expansion Port Control Register
Register Address:
18Ah + (200h x (n - 1)) : where n = 1 to 4
Bit #
7
6
5
4
3
2
1
0
Name
THMS
THEN
—
—
—
TBPDIR
TBPFUS
TBPEN
Default
0
0
0
0
0
0
0
0
Bit 7 : Transmit HDLC-256 Mode Select (THMS). T1 Mode
0 = Transmit HDLC-256 assigned to timeslots
1 = Transmit HDLC-256 assigned to FDL Bits
Bit 7 : Transmit HDLC-256 Mode Select (THMS). E1 Mode
0 = Transmit HDLC-256 assigned to timeslots
1 = Transmit HDLC-256 assigned to the Sa Bits
Bit 6 : Transmit HDLC-256 Enable (THEN).
0 = Transmit HDLC-256 is not active.
1 = Transmit HDLC-256 is active.
Bit 2: Transmit BERT Port Direction Control (TBPDIR)
0 = Normal (line) operation. Transmit BERT port sources data into the transmit path.
1 = System (backplane) operation. Transmit BERT port sources data into the receive path (RSERn). In this
mode, the data from the BERT is muxed into the receive path.
Bit 1: Transmit BERT Port Framed/Unframed Select (TBPFUS). T1 mode only
0 = The DS26514’s transmit BERT will not clock data into the F-bit position (framed).
1 = The DS26514’s 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.