bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 82
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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2.0 Circuit Description
2.8 Transmitter
2.8.1 External Transmit Data Link
Figure 2-29. Transmit External Data Link Waveforms
2.8.2 Transmit Data Links
2-54
TDLCKO
NOTE(S):
TDLI
2.8.2.1 Data Link
This example shows bits 1, 2, 7, and 8 of TS9 selected. Any combination of time slot bits can be selected.
Controllers
TS8
The External Data Link (DL3) allows the system to supply externally any bits in
any time slot of all frames, odd frames, or even frames, including T1 framing bits.
Pin access to the DL3 transmitter is provided through TDLCKO and TDLI, which
serve as the TDL3 clock output (TDLCKO) and data input (TDLI). The mode of
the pins is selected using TDL_IO bit in the Programmable Input/Output register
[PIO; addr 018].
Slot [DL3_TS; addr 015] and External Data Link Bit [DL3_BIT; addr 016].
Transmit DL3 is set up by selecting the bit(s) [DL3_BIT], and time slot [TS[4:0];
addr 015] to be overwritten, and then enabling the data link [DL3EN; addr 015].
Enabling the data link starts TDLCKO for gating the NRZ data provided on
TDLI. See
The XMTR contains two independent data link controllers (DL1, DL2):
a Performance Report Message (PRM) generator and a Bit-Oriented Protocol
(BOP) transceiver. DL1 and DL2 can be programmed to send and receive HDLC
formatted messages in the Message Oriented Protocol (MOP) mode, or
unformatted serial data can be sent and received in any combination of bits within
a selected time slot or F-bit channel. The PRM message generator can
automatically send 1-second performance reports. The BOP transceiver can
preemptively transmit BOP messages, such as ESF Yellow Alarm.
The Bt8370 and Bt8375 provide two internal data link controllers, and the Bt8376
provides a single controller. DL1 and DL2 control the serial data channels, which
operate in multiples of 4 kbps to the maximum 64 kbps time slot rate. This is done
by selecting a combination of bits from either odd, even, or all frames. Both data
link controllers support ESF Facilities Data Link (FDL), SLC-96 data link,
Sa data link, Common Channel Signaling (CCS), Signaling System #7 (SS7);
ISDN LAPD channels; Digital Multiplexed Interface (DMI) signaling in TS24;
and the latest ETSI V.51 and V.52 signaling channels. DL1 and DL2 each contain
a 64-byte transmit buffer which function either as programmable length circular
buffers in transparent (unformatted) mode, or as full-length data FIFOs in
formatted (HDLC) mode.
Control of DL3 format is provided in two registers: External Data Link Time
1
Figure
2
2-29.
Conexant
TS9
Fully Integrated T1/E1 Framer and Line Interface
7
8
Bt8370/8375/8376
TS10
N8370DSE
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