ST75C520PQFP datasheet(15/45 Pages) STMICROELECTRONICS

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V.2.1.4 - Configuration Control Commands

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 monit ored 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.

V.2.1.5 - Tone Generation Commands

TONE

Se le ct Tone. Progra m s the ton e

gene rator(s) for the desired default

tone(s). Additional mnemonics provide

quick programming of DTMF tones or

other currently used tones. Parametric

command.

DEFT

De fi ne Tone. Programs t he t one

generator(s) for arbitrary tone synthesis.

Parametric command.

TGEN

Tone Generator Control. Enables or

di sabl es t h e t one gener at or ( s ).

Parametric command.

IV.2.1.6 - Tone Detection Commands

TDRC

Read Tone Detector Coefficient. Read

o n e To ne Dete c to r Co effi ci en t.

Parametric command.

TDWC

Write Tone Detector Coefficient. Write

o n e To ne Dete c to r Co effi ci en t.

Parametric command.

TDRW

Read Tone Detector Wiring. Read one

Tone Detector Wirin g co nnection.

Parametric command.

TDWW

Write Tone Detector Wiring. Write one

Tone Detector Wirin g co nnection.

Parametric command.

TDZ

Clear Tone Detector Cell. Clear internal

variables of a Tone Detector Cell.

Parametric command.

V.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.

ST75C520

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