MT90737 Просмотр технического описания (PDF) - Mitel Networks

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производитель

MT90737

CMOS DS3/DS1 MUX/DEMUX (M13)

Mitel Networks 

Preliminary Information

CMOS MT90737

Addr Bit

1C 7

6

5-0

Symbol

EXEC

CONT/10

TFEACn

(n=6-1)

Description

Transmit FEAC Word.

Bit 7 (EXEC) initiates the FEAC transmission (EXEC=1) and also indicates when

the transmission is completed (EXEC=0).

Bit 6 (CONT/10) controls the duration of the FEAC transmission (1 = continuous, 0

= 10 times).

Bits 5-0 (TFEACn) constitute the variable (XXXXXX) field in the FEAC word. A

FEAC word is written in the field in the same order of transmission as shown

below:

16-Bit FEAC Word

0 XXXXXX

0 11111111

bit 7

1CH

XXXXXX

FEAC Word/Microprocessor

Write Relationship

The MT90737 formats and generates the other ones and zeros that comprise the

FEAC word. A minimum length (send FEAC word 10 times) message is sent using

the following sequence:

- Write 1 0 X X X X X X (X’s=6-bit FEAC word)

- MT90737 sends 16-bit FEAC word 10 times

- MT90737 indicates completion by resetting bit 7 (0 0 X X X X X X)

A continuous FEAC word is sent using the following sequence:

- Write 1 1 X X X X X X (X’s=6-bit FEAC word)

- MT90737 sends 16-bit FEAC word continuously

- Write 1 0 X X X X X X (X’s=6-bit FEAC word)

- MT90737 indicates completion by resetting bit 7 (0 0 X X X X X X)

5-83

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