ST75C540 datasheet(26/84 Pages) STMICROELECTRONICS

26 / 84 page

VI.2.1.4 - Configuration Control Commands

ASEL

Select the Analog path option, like

Microphone input, Speaker attenuation.

Parametric command.

CONF

Configure. This command configures the

modem engine for data transmission and

handshake procedures (if any) in any of

the supported modes. The transmission

parameters are set to their default values

and can be modified with the MODC

command. Parametric command.

MODC

Modify Configuration. This command

allows modification of some of the

parameters which have been set up by

the CONF command. It can also be used

to alter the mode of operations (short

train). Parametric command.

DOSR

Define Optional Status Report. This

command allows the modification of the

optional status report located in the status

area of the dual port RAM. One can thus

select a particular parameter to be

monitored during all modes of operation.

Parametric command.

DSIT

Define Status Interrupt. This command

allows the programming of the status

word bit that will generate an Interrupt to

the controller. Parametric command.

VI.2.1.5 - Tone Generation Commands

TONE

SelectTone. Programsthe tonegenerator(s)

for the desired default tone(s). Additional

mnemonics provide quick programming of

DTMF tones or other currently used tones.

Parametric command.

DEFT

De f i ne To ne. Pr ogr a ms t h e t one

generator(s) for arbitrary tone synthesis.

Parametric command.

TGEN

Tone Generator Control. Enables or

di s ables t he t on e gener a t or ( s) .

Parametric command.

VI.2.1.6 - Tone Detection Commands

TDRC

Read Tone Detector Coefficient. Read

on e Tone D et ect or C oe f f ic i ent .

Parametric command.

TDWC

Write Tone Detector Coefficient. Write

on e Tone D et ect or C oe f f ic i ent .

Parametric command.

TDRW

Read Tone Detector Wiring. Read one

Tone Det ecto r Wi rin g co nne ction.

Parametric command.

TDWW Write Tone Detector Wiring. Write one

Tone De tecto r Wir ing connection.

Parametric command.

TDZ

Clear Tone Detector Cell. Clear internal

variables of a Tone Detector Cell.

Parametric command.

VI.2.1.7 - Miscellaneous Commands

CALL

Call a Subroutine. Call a subroutine with

one Parameter. Parametric command.

JSR

Call a Low Level Subroutine. Call an

internal subroutine with one parameter.

Parametric command.

VI.3 - Command Set Short Form

CCI Command

Mnemonic

Value

Description

XMIT

0x01

Transmit Data

SETGN

0x02

Set Transmit Gain

SLEEP

0x03

Power Down the ST75C530/540

HSHK

0x04

FAX Start Transmitter

RTRA*

0x05

Retrain (V.32bis/V.32 and V.22bis)

INIT

0x06

Initialize (Software Reset)

CSE

0x08

Clear Error Status Word

FORM

0x09

Define Data Format

DOSR

0x0A

Define Optional Status Report

ASEL

0x0B

Select the Analog Path Options

TONE

0x0C

Generate Predefined Tones

TGEN

0x0D

Enable Tone Generator

DEFT

0x0E

Define Arbitrary Tone

0x10

Memory Read

0x11

Complex Read

0x12

Memory Write

DSIT

0x13

Define Status Interrupt

IDT

0x14

Return Product Identification Code

JSR

0x18

Call a Low Level Routine

CALL

0x19

Call a Routine

TDRC

0x1A

Tone Detector Read Coefficient

TDRW

0x1B

Tone Detector Read Wiring

TDWC

0x1C

Tone Detector Write Coefficient

TDWW

0x1D

Tone Detector Write Wiring

TDZ

0x1E

Tone Detector Clear Cell

CONF

0x20

Configure

MODC

0x21

Modify Default Configuration

STOP

0x25

FAX Stop Transmitter

SYNC

0x26

FAX Synchronize Receiver

MRI

0x28

Memory Read Indirect

MRLO

0x29

Memory Read Low Word

MWI

0x2A

Memory Write Indirect

MWLO

0x2B

Memory Write Low Word

* ST75C540 only.

VI - USER INTERFACE (continued)

ST75C530 - ST75C540

26/84

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