BT8376EPF datasheet(172/323 Pages) CONEXANT

172 / 323 page

Bt8370/8375/8376

3.8 Receiver Registers

Fully Integrated T1/E1 Framer and Line Interface

3-54

Conexant

N8370DSE

Table 3-13. Receive Yellow Alarm Set/Clear Criteria

Mode

Set/Clear Criteria

Set for 4 frames (500

µs) if 2 consecutive NFAS frames each contain TS0 bit 3 = 1. Cleared for 4 frames if 2

consecutive NFAS frames each contain TS0 bit 3 = 0.

Y0_INT

Set for 16 multiframes (32 ms) if every NFAS frame contains TS0 bit 3 = 1. Cleared for 16 multiframes if 1 or

more NFAS frame contains TS0 bit 3 = 0.

Y16

Set for 2 multiframes (4 ms) if frame 0 in 2 consecutive multiframes each contain TS16 bit 6 = 1. Cleared for

2 multiframe if frame 0 in 2 consecutive multiframes each contain TS16 bit 6 = 0.

Y16_INT

Set for 16 multiframes (32 ms) if every frame 0 contains TS16 bit 6 = 1. Cleared for 16 multiframes if 1 or

more frame 0 contains TS16 bit 6 = 0.

YB2

Set for 1 frame (125

µs) if all 24 time slots contain bit 2 = 0. Cleared for 1 frame if 1 or more time slots

contain bit 2 = 1.

YB2_INT

Set for 192 frames (24 ms) if fewer than 15 time slots contain bit 2 = 1. Cleared for 192 frames if 15 or more

time slots contain bit 2 = 1.

Set for 1 multiframe (1.5 ms) if frame 12 contains Fs bit = 1. Cleared for 1 multiframe if frame 12 contains

Fs bit = 0.

YJ_INT

Set for 16 multiframes (24 ms) if each frame 12 contains Fs bit = 1. Set for 16 multiframes (24 ms) if 1 or

more frame 12 contains Fs bit = 0.

Y24

Set for 1 frame (125

µs) if TS24 contains bit 6 = 0. Cleared for 1 frame if TS24 contains bit 6 = 1.

Y24_INT

Set for 192 frames (24 ms) if each TS24 bit 6 = 0. Cleared for 192 frames if 1 or more TS24 bit 6 = 1.

Set for 32 frames (4 ms) if 16 FDL bits contain Yellow Alarm priority codeword pattern (00FFh). Cleared for

32 frames if 16 FDL bits do not contain a Yellow Alarm priority codeword pattern.

YF_INT

Set upon reception of 16 FDL bits matching Yellow Alarm priority codeword and remains set as long as the

codeword pattern is not interrupted for greater than 100 ms. Cleared when the Yellow Alarm priority

codeword is not present for more than 100 ms (26 missing codewords = 104 ms).

BT8376EPF Datasheet(PDF) 172 Page - Synaptics Incorporated.

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