Datasheet

DS26514 4-Port T1/E1/J1 Transceiver
19-5856; Rev 4; 5/11 171 of 305
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 4
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
Register Address:
08Ah + (200h x (n - 1)) : where n = 1 to 4
Bit #
7
6
5
4
3
2
1
0
Name
RHMS
RHEN
—
—
—
RBPDIR
RBPFUS
RBPEN
RHMS
—
—
—
—
RBPDIR
—
RBPEN
Default
0
0
0
0
0
0
0
0
Bit 7 : Receive HDLC-256 Mode Select (RHMS). T1 Mode
0 = Receive HDLC-256 assigned to timeslots
1 = Receive HDLC-256 assigned to FDL Bits
Bit 7 : Receive HDLC-256 Mode Select (RHMS). E1 Mode
0 = Receive HDLC-256 assigned to timeslots
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 DS26514’s receive BERT will not clock data from the F-bit position (framed).
1 = The DS26514’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.