Maxim Integrated DS33R11 User Manual
Page 202
DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
202 of 344
Register Name:
TR.IOCR1
Register Description:
I/O Configuration Register 1
Register Address:
01h
Bit
# 7 6 5 4 3 2 1 0
Name RSMS RSMS2
RSMS1 RSIO TSDW TSM TSIO ODF
Default
0 0 0 0 0 0 0 0
Bit 7: RSYNC Multiframe Skip Control (RSMS) Useful in framing format conversions from D4 to ESF. This
function is not available when the receive-side elastic store is enabled. RSYNC must be set to output multiframe
pulses (TR.IOCR1.5 = 1 and TR.IOCR1.4 = 0).
0 = RSYNC outputs a pulse at every multiframe
1 = RSYNC outputs a pulse at every other multiframe
Bit 6: RSYNC Mode Select 2 (RSMS2)
T1 Mode: RSYNC pin must be programmed in the output frame mode (TR.IOCR1.5 = 0, TR.IOCR1.4 = 0).
0 = do not pulse double-wide in signaling frames
1 = do pulse double-wide in signaling frames
E1 Mode: RSYNC pin must be programmed in the output multiframe mode (TR.IOCR1.5 = 1, TR.IOCR1.4
= 0).
0 = RSYNC outputs CAS multiframe boundaries
1 = RSYNC outputs CRC4 multiframe boundaries
Bit 5: RSYNC Mode Select 1(RSMS1) Selects frame or multiframe pulse when RSYNC pin is in output mode. In
input mode (elastic store must be enabled), multiframe mode is only useful when receive signaling reinsertion is
enabled. See the timing diagrams in Section
.
0 = frame mode
1 = multiframe mode
Bit 4: RSYNC I/O Select (RSIO) (Note: This bit must be set to 0 when TR.ESCR.0 = 0.)
0 = RSYNC is an output
1 = RSYNC is an input (only valid if elastic store enabled)
Bit 3: TSYNC Double-Wide (TSDW) (Note: This bit must be set to 0 when TR.IOCR1.2 = 1 or when TR.IOCR1.1
= 0.)
0 = do not pulse double-wide in signaling frames
1 = do pulse double-wide in signaling frames
Bit 2: TSYNC Mode Select (TSM) Selects frame or multiframe mode for the TSYNC pin. See the timing diagrams
in Section
.
0 = frame mode
1 = multiframe mode
Bit 1: TSYNC I/O Select (TSIO)
0 = TSYNC is an input
1 = TSYNC is an output
Bit 0: Output Data Format (ODF)
0 = bipolar data at TPOSO and TNEGO
1 = NRZ data at TPOSO; TNEGO = 0