bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 209
bt8375kpf
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.
Datasheet
1.BT8375KPF.pdf
(323 pages)
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Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
3
3.16 Data Link Registers
Unused bits indicated by a dash (
effect.
send and receive HDLC formatted or unformatted serial data over any combination of bits within a selected time
slot. The serial data channels operate at a multiple of 4 kbps, up to the full 64 kbps time slot rate, by selecting a
combination of time slot bits from odd, even, or all frames. DL1 and DL2 each contain a 64-byte receive and
64-byte transmit buffer which function as programmable length circular buffers or as full-length data FIFOs.
The Bt8376 device contains only a single controller, DL1.
DL1_TS[7]
DL1_TS[6, 5]
DL1_TS[4:0]
N8370DSE
0A4— DL1 Time Slot Enable (DL1_TS)
The Bt8370 and Bt8375 contain two independent Data Link Controllers (DL1, DL2) that are programmed to
DL1_TS[7]
7
DL1_TS[6]
Unchannelized—Test mode only, all time slots selected. Zero for normal operation.
Frame Select—Transmit and receive data link 1 operates on data only during specified T1/E1
frames. Frame select options give the processor access to different types of data link channels
and overhead channels. Overhead bit insertion is performed after TDL1, so internal transmitter
overhead insertion must be bypassed [TFRM; addr 072] before processor-supplied overhead
can be output from TDL1.
Time Slot Word Enable—Transmit and receive data link 1 operates on data only during the
specified time slot. During T1 mode, selecting time slot 0 enables data link operation on the
F-bit positions.
6
DL1_TS[5]
—
DL1_TS[4:0]
5
) are reserved and should be written to 0. Writing to reserved bits has no
00000
00001
11110
11111
00 = all frames
01 = even frames only
10 = odd frames only
11 = reserved
|
DL1_TS[4]
4
Conexant
F-bit (T1) or TS0 (E1)
Time slot Enable
DL1_TS[3]
TS30
TS31
3
TS1
|
DL1_TS[2]
2
DL1_TS[1]
3.16 Data Link Registers
1
DL1_TS[0]
0
3-91
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