Datasheet

DS26518 8-Port T1/E1/J1 Transceiver
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Register Name:
TXPC
Register Description:
Transmit Expansion Port Control Register
Register Address:
18Ah + (200h x (n - 1)) : where n = 1 to 8
Bit # 7 6 5 4 3 2 1 0
Name THMS THEN — — — TBPDIR TBPFUS TBPEN
THMS THEN
— — —
TBPDIR
—
TBPEN
Default 0 0 0 0 0 0 0 0
Bit 7 (T1 Mode): Transmit HDLC-256 Mode Select (THMS)
0 = Transmit HDLC-256 assigned to time slots.
1 = Transmit HDLC-256 assigned to FDL bits.
Bit 7 (E1 Mode): Transmit HDLC-256 Mode Select (THMS)
0 = Transmit HDLC-256 assigned to time slots.
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 DS26518’s transmit BERT will
not clock data into the F-bit position (framed).
1 = The DS26518’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.