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____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
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Register Name:
RIOCR
Register Description:
Receive I/O Configuration Register
Register Address:
base address + 0x210
Bit #
7
6
5
4
3
2
1
0
Name
RCLKINV
RSYNCINV
Reserved
RSCLKM
RSMS
RSIO
RSMS2
RSMS1
Default
0
1
0
Bit 7: RCLK Invert (RCLKINV). See the RCLK signal going into the Rx framer in
Figure 6-1.
0 = No inversion
1 = Invert RCLK signal
Bit 6: RSYNC Invert (RSYNCINV). See the RSYNCin and RSYNCout signal going into/out-of the Rx framer in
0 = No inversion
1 = Invert RSYNC as either input or output
Bit 5: Reserved.
0 = Normal operation
Bit 4: RSYSCLK Mode Select (RSCLKM). See the RSYSCLK signal going into the Rx framer in
Figure 6-1.
0 = RSYSCLK is 1.544MHz
1 = RSYSCLK is 2.048MHz
Bit 3: RSYNC Multiframe Skip Control (RSMS). T1 Mode Only. See the RSYNC in and RSYNC out signals
going into and out of the Rx framer in
Figure 6-1. This configuration bit is useful in framing format conversions from
D4 to ESF. This function is not available when the Rx side elastic store is enabled. RSYNC must be set to output
0 = RSYNC outputs a pulse at every multiframe
1 = RSYNC outputs a pulse at every other multiframe
Bit 2: RSYNC I/O Select (RSIO). See the RSYNC in and RSYNC out signals going into and out of the Rx framer
in
Figure 6-1. This bit must be set to zero when the elastic store is disabled. The default value for this bit is 1 so
that the default I/O direction of RSYNC is input.
0 = RSYNC is an output
1 = RSYNC is an input (only valid if elastic store is enabled)
Bit 1: RSYNC Mode Select 2 (RSMS2). See the RSYNC in and RSYNC out signals going into and out of the Rx
T1 Mode: RSYNC must be configured in the output frame mode (RSIO=0, RSMS1=0)
0 = do not pulse double wide in signaling frames
1 = do pulse double wide in signaling frames
E1 Mode: RSYNC must be configured in the output multiframe mode (RSIO=0, RSMS=1)
0 = RSYNC outputs CAS multiframe boundaries
1 = RSYNC outputs CRC-4 multiframe boundaries
Note: In E1 mode, RSMS2 also selects which multiframe signal is available at the framer’s RMSYNC
output, regardless of the configuration for RSYNC. When RSMS2 = 0, RMSYNC outputs CAS multiframe
boundaries; when RSMS2 = 1, RMSYNC outputs CRC-4 multiframe boundaries.
Bit 0: RSYNC Mode Select 1 (RSMS1). See the RSYNC in and RSYNC out signals going into and out of the Rx
framer in
Figure 6-1. When RSYNC is in output mode (RSIO=0), this bit specifies whether RSYNC outputs a frame
pulse or a multiframe pulse. When RSYNC is in input mode (elastic store must be enabled) multiframe mode is
only useful when Rx signaling reinsertion is enabled.
0 = frame mode
1 = multiframe mode