cx28394 Conexant Systems, Inc., cx28394 Datasheet - Page 221

• Manufacturer Part Number: cx28394
• Description: Quad/x16/octal-t1/e1/j1 Framers
• Manufacturer: Conexant Systems, Inc.

CX28394/28395/28398
Quad/x16/Octal—T1/E1/J1 Framers
BUS_TSB
TX_ALIGN
TPCM_NEG
TSYN_NEG
TSB_ALIGN
100054E
0D4—Transmit System Bus Configuration (TSB_CR)
BUS_TSB
7
TX_ALIGN
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.
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.
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.
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.
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 = TINDO repeated for all bus groups
1 = three-state TINDO during unused time slots
0 = Transmitter multiframe does not follow TSB
1 = Transmitter multiframe follows TSB multiframe
0 = TINDO rising edge output (TPCMI and TSIGI falling edge inputs)
1 = TINDO falling edge outputs (TPCMI and TSIGI rising edge inputs)
0 = TFSYNC or TMSYNC rising edge output (falling edge input)
1 = TFSYNC or TMSYNC falling edge output (rising edge input)
0 = TSB multiframe does not follow XMTR
1 = TSB multiframe aligned by XMTR
6
NOTE(S):
RFSYNC and RMSYNC outputs.
OFFSET[9:5]
11111
11111
11111
11111
Offsets which are outside the RSB timebase range result in no pulses on
TPCM_NEG
5
OFFSET[4:3]
00
01
10
11
8192 Kbps/sec SBI Mode
TSYN_NEG
4
Conexant
RSYNC Time Slot
TSB_ALIGN
31
31
31
31
3
TSB_CTR
2
Group
A
B
C
D
TSBI[1]
3.16 System Bus Registers
1
3.0 Registers
TSBI[0]
0
3-99