bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 235

• Manufacturer Part Number: bt8375kpf
• Description: Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
• Manufacturer: Conexant Systems, Inc.

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
BUS_TSB
TX_ALIGN
TPCM_NEG
N8370DSE
0D4— Transmit System Bus Configuration (TSB_CR)
BUS_TSB
7
TX_ALIGN
Enable Bussed 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 bus groups 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.
6
NOTE(S):
RMSYNC outputs.
OFFSET[9:5]
00000
00000
00000
00000
00001
00001
00001
00001
11110
11110
11110
11110
11111
11111
11111
11111
Offsets outside the RSB timebase range result in no pulses on RFSYNC and
|
TPCM_NEG
5
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)
OFFSET[4:3]
TSYN_NEG
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
|
4
Conexant
8192 kbps SBI Mode
TSB_ALIGN
RSYNC Time Slot
3
30
30
30
30
31
31
31
31
0
0
0
0
1
1
1
1
|
TSB_CTR
2
TSBI[1]
3.17 System Bus Registers
1
Group
A
D
A
D
A
D
A
D
B
C
B
C
B
C
B
C
|
TSBI[0]
0
3-117