CX28394/28395/28398
3.0 Registers
Quad/x16/Octal—T1/E1/J1 Framers
3.16 System Bus Registers
8192 Kbps/sec SBI Mode
OFFSET[9:5] OFFSET[4:3]
RSYNC Time Slot
Group
11111
11111
11111
11111
00
01
10
11
31
31
31
31
A
B
C
D
NOTE(S): Offsets which are outside the RSB timebase range result in no pulses on
RFSYNC and RMSYNC outputs.
0D4—Transmit System Bus Configuration (TSB_CR)
7
6
5
4
3
2
1
0
BUS_TSB
TX_ALIGN
TPCM_NEG
TSYN_NEG
TSB_ALIGN
TSB_CTR
TSBI[1]
TSBI[0]
BUS_TSB
Enable Bused TSB Output—Applicable only if system bus outputs are controlled by SBI
timebases [SBI_OE = 1; addr 0D0]. When BUS_TSB is active, TINDO outputs from multiple
devices are allowed to share a common transmit system bus connection. Unused time slots are
three-stated during those bus groups that are not selected by SBI mode [addr 0D0]. Otherwise,
unused time slots repeat their TINDO value for all bus groups.
0 = TINDO repeated for all bus groups
1 = three-state TINDO during unused time slots
TX_ALIGN
Transmitter Output Multiframe Aligns to TSB Timebase—Allows multiframe alignment
located at TSB (from TMSYNC or TFRAMER to pass across TSLIP buffer and force the
corresponding multiframe alignment onto the transmitter timebase. Used primarily to pass
TMSYNC from system bus.
0 = Transmitter multiframe does not follow TSB
1 = Transmitter multiframe follows TSB multiframe
TPCM_NEG
TSYN_NEG
Output Data on Falling Edge Clock—Selects TSBCKI rising or falling edge clock signal to
output TINDO and the opposite TSBCKI edge to sample TPCMI and TSIGI inputs.
0 = TINDO rising edge output (TPCMI and TSIGI falling edge inputs)
1 = TINDO falling edge outputs (TPCMI and TSIGI rising edge inputs)
Output Sync on Falling Edge Clock—Selects TSBCKI rising or falling edge clock signal for
TFSYNC or TMSYNC outputs. The opposite TSBCKI edge is used if TFSYNC or TMSYNC
is programmed as input.
0 = TFSYNC or TMSYNC rising edge output (falling edge input)
1 = TFSYNC or TMSYNC falling edge output (rising edge input)
TSB_ALIGN
Transmit System Bus Multiframe Aligns to Transmit Timebase—Allows multiframe
alignment located at TX timebase to pass across TSLIP and force the corresponding
multiframe alignment onto the TSB timebase. Used primarily to pass CAS or MFAS alignment
located by the transmit online framer onto the TMSYNC output.
0 = TSB multiframe does not follow XMTR
1 = TSB multiframe aligned by XMTR
100054E
Conexant
3-99
CONEXANT [ CONEXANT SYSTEMS, INC ]
