Rainbow Electronics DS26503 - Manual (Page 52)

DS26503 T1/E1/J1 BITS Element
52 of 123
10. I/O PIN CONFIGURATION OPTIONS
Register Name: IOCR1
Register Description: I/O Configuration Register 1
Register Address: 01h
Bit
# 7 6 5 4 3 2 1 0
Name — RSMS2 RSMS1 RLOFF TSDW TSM TSIO ODF
Default 0 0 0 0 0 0 0 0
HW
Mode
0 0
RSM
PIN 1
0 0
TSM
PIN 2
0 0
Bit 0/Output Data Format (ODF).
0 = bipolar data at TPOS and TNEG
1 = NRZ data at TPOS; TNEG = 0
Bit 1/TS I/O Select (TSIO). This bit determines whether the TS pin is an input or and output. See
Table 10-1 .
0 = TS is an input
1 = TS is an output
Bit 2/TS Mode Select (TSM). In T1 or E1 operation, selects frame or multiframe mode for the TS pin. In 6312kHz mode, this
bit should be set = 0. See
Table 10-1 .
0 = frame mode
1 = multiframe mode
Bit 3/Transmit Signaling Double-Wide Sync (TSDW). In T1 mode, setting this bit = 1 and setting TSIO = 1 will cause the
sync-pulse output on TS to be two clocks wide during signaling frames. In E1 or 6312kHz mode, this bit should be set = 0. See
Table 10-1 .
0 = (T1) normal sync pulses
1 = (T1) double-wide sync pulses during signaling frames
Bit 4/ RLOF Output Function (RLOFF). In T1 or E1 receive mode this bit determines the function of the RLOF pin. In
6312kHz receive mode, this bit should be set = 0.
0 = receive loss of frame (RLOF)
1 = loss-of-transmit clock (LOTC)
Bit 5/RS Mode Select 1(RSMS1). In T1 or E1 receive mode, this bit selects a frame or multiframe output pulse at RS pin.
IOCR.6 may be used to select other function for the RS pin.
0 = frame mode
1 = multiframe mode
Bit 6/RS Mode Select 2 (RSMS2). In T1 and E1 receive mode, this bit along with IOCR.5 selects the function of the RS pin.
T1 Mode: (when IOCR.5 set = 0)
0 = do not pulse double-wide in signaling frames
1 = do pulse double-wide in signaling frames
E1 Mode: (when IOCR.5 set = 1)
0 = RS outputs CAS multiframe boundaries
1 = RS outputs CRC4 multiframe boundaries
Bit 7/Unused, must be set = 0 for proper operation
.