BT8376EPF datasheet(55/323 Pages) CONEXANT

55 / 323 page

Bt8370/8375/8376

2.0 Circuit Description

Fully Integrated T1/E1 Framer and Line Interface

2.4 Receiver

N8370DSE

Conexant

2-27

2.4.10.1 Data Link

Controllers

The Bt8370 and Bt8375 provide two internal data link controllers, and the Bt8376

provides a single controller (DL1). DL1 and DL2 control two serial data channels

operating at multiples of 4 kbps—up to the full 64 kbps time slot rate—by

selecting a combination of bits from odd, even, or all frames. Both DL1 and DL2

support the following: 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,

ETSI V.5.1 and V.5.2 control channels. DL1 and DL2 each contain a 64-byte

receive buffer that functions as either programmable length circular buffers or

full-length data FIFOs.

Both data link controllers are configured identically, except for their offset in

the register map. The DL1 address range is 0A4 to 0AE, and the DL2 address

range is 0AF to 0B9. From this point on, DL1 is used to describe the operation of

both data link controllers.

DL1 is enabled using the DL1 Control register [DL1_CTL; addr 0A6]. DL1

does not function until it is enabled. DL1_CTL also controls the format of the

data. The following data formats [DL1[1:0]; addr 0A6] are supported on the data

link: Frame Check Sequence (FCS), non-FCS, Pack8, or Pack6. FCS and

non-FCS are HDLC formatted messages. Pack8 and Pack6 are unformatted

messages with 8 bits per FIFO access, or 6 bits per FIFO access, respectively

(see Table 2-4).

Table 2-4. Commonly Used Data Link Settings

Data Link

Frame

Time Slot

Time Slot Bits

Mode

ESF FDL

Odd

0 (F-bits)

Don’t Care

FCS

T1DM R Bit

All

00000010

FCS

SLC-96

Even

0 (F-bits)

Don’t Care

Pack6

ISDN LAPD

All

11111111

FCS

Sa4

Odd

00001000

FCS

NOTE(S):

N represents any T1/E1 time slot.

BT8376EPF Datasheet(PDF) 55 Page - Synaptics Incorporated.

BT8376EPF Datasheet(HTML) 55 Page - Synaptics Incorporated.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL