Datasheet

DS26518 8-Port T1/E1/J1 Transceiver
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Register Name:
T1RSCC (T1 Mode Only)
Register Description:
In-Band Receive Spare Control Register
Register Address:
089h + (200h x (n - 1)) : where n = 1 to 8
Bit # 7 6 5 4 3 2 1 0
Name — — — — — RSC2 RSC1 RSC0
Default 0 0 0 0 0 0 0 0
Bits 2 to 0: Receive Spare Code Length Definition Bits (RSC[2:0])
RSC2 RSC1 RSC0 LENGTH SELECTED
0 0 0 1 bits
0 0 1 2 bits
0 1 0 3 bits
0 1 1 4 bits
1 0 0 5 bits
1 0 1 6 bits
1 1 0 7 bits
1 1 1 8 : 16 bits
Register Name:
RXPC
Register Description:
Receive Expansion Port Control Register (HDLC-256)
Register Address:
08Ah + (200h x (n - 1)) : where n = 1 to 8
Bit # 7 6 5 4 3 2 1 0
Name RHMS
RHEN — — — RBPDIR RBPFUS RBPEN
RHMS RHEN
— — —
RBPDIR
—
RBPEN
Default 0 0 0 0 0 0 0 0
Bit 7 (T1 Mode): Receive HDLC-256 Mode Select (RHMS)
0 = Receive HDLC-256 assigned to time slots
1 = Receive HDLC-256 assigned to FDL bits
Bit 7 (E1 Mode): Receive HDLC-256 Mode Select (RHMS)
0 = Receive HDLC-256 assigned to time slots
1 = Receive HDLC-256 assigned to the Sa bits
Bit 6: Receive HDLC-256 Enable (RHEN)
0 = Receive HDLC-256 is not active.
1 = Receive HDLC-256 is active.
Bit 2: Receive BERT Port Direction Control (RBPDIR)
0 = Normal (line) operation. Rx BERT port receives data from the receive framer.
1 = System (backplane) operation. Rx BERT port receives data from the transmit path. The transmit path
enters the receive BERT on the line side of the elastic store (if enabled).
Bit 1: Receive BERT Port Framed/Unframed Select (RBPFUS) (T1 Mode Only)
0 = The DS26518’s receive BERT will
not clock data from the F-bit position (framed).
1 = The DS26518’s receive BERT will clock data from the F-bit position (unframed).
Bit 0: Receive BERT Port Enable (RBPEN)
0 = Receive BERT port is not active.
1 = Receive BERT port is active.