BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 237

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
OFFSET[2:0]
OFFSET[9:3]
N8370DSE
0D5—TSB Sync Bit Offset (TSYNC_BIT)
0D6—TSB Sync Time Slot Offset (TSYNC_TS)
—
—
7
7
OFFSET[9]
TSB Sync Bit Offset—Selects which TSB bit number coincides with TFSYNC and TMSYNC
sync pulses. Sync pulses are programmed to align to 1 bit in relation to TPCMI, TSIGI, and
TINDO time slots. If the sync pulses are desired to coincide with location of T1 F-bit or time
slot zero bit 1, OFFSET is programmed to equal 0. Sync bit offset is added to time slot offset
[TSYNC_TS; addr 0D6] to form a 10-bit OFFSET value that applies to TFSYNC and
TMSYNC location. Both TFSYNC and TMSYNC offsets are expressed as TSB.OFFSET,
allowing the system to generate or accept sync pulses at any bit location within the TSB frame.
TSB Sync Time Slot Offset—Selects which TSB time slot number coincides with TFSYNC
and TMSYNC sync pulses, in the range of time slots 0–127. If the sync pulses coincide with
location of T1 F-bit or TS0, OFFSET is programmed to equal 0.
—
6
6
OFFSET[8]
OFFSET[2:0]
OFFSET[9:3]
—
0000000
0000001
0011110
0011111
5
5
000
001
110
111
|
|
OFFSET[7]
2048, 1544, and 1536 kbps SBI Mode
—
4
4
Conexant
OFFSET[6]
TSYNC Location
—
TSYNC Time Slot
3
3
Bit 1 or F-bit
0 or F-bit
Bit 2
Bit 7
Bit 8
|
30
31
1
|
OFFSET[2]
OFFSET[5]
2
2
OFFSET[1]
OFFSET[4]
3.17 System Bus Registers
1
1
OFFSET[0]
OFFSET[3]
0
0
3-119