FEDL 7012-04-01

1Semiconductor

ML7012-04

11/22

(3) AT command list

It is regarded that n = 0 when the parameter is not specified to the command with parameter (n).

CMD

Style

Function

Initial Value

Note

+++AT

<CR>

—

Goes to on-line command mode from data mode.

Inputs +++AT <CR> in data mode.

Does not move to on-line command mode until <CR>is

input.

—

A

ATA

Starts line connection in answer mode

—

ATD

Starts line connection in originate mode

—

D

ATDc

Connects lines in originate mode after dialing.

c: Dial control character

Pulse: 0, 1, 2, 3 ,4, 5, 6, 7, 8, 9

Tone: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, *, #

@ Silence Detection

Next dialing is executed when continuous silence of 5 sec is

detected after ring back tone within the period specified in S7

register.

Sends back ‘BUSY’ when busy tone is detected and sends

back ‘NO ANSWER’ when no silence is detected after ring

back tone.

! Flash

Dialing is put on hold for the period specified in the S8

register for pause settings.

,Comma

The line is put on-hook for 0.5 sec.

Dialing is put on hold for the period specified in the S8

register for pause settings.

; Moves to command mode without disconnecting lines after

dialing is completed.

P: Dials the number in pulse mode thereafter.

T: Dials the number in tone mode thereafter.

W: Detects a dial tone.

Detects the next dial string process when dial tone is

detected during the period specified in S7 register

regardless of ATXn command settings.

When it is not detected, ‘NO DIALTONE’ is returned.

—

EATEn

Selects the answer-back function for the commands.

N = 0: No answer back for command input characters.

N = 1: Answer back for command input characters.

1

HATH

Controls the line connection.

N = 0: On-hook

N = 1: Off-hook

—

IATI

Displays the modem manufacturer’s code

'24A' as a result code is returned to DTE after ATI0<CR> is

executed.

—

MATMn

Selects the monitor speaker operation.

N = 0: Always OFF

N = 1: ON from dialing to line connection

N = 2: Always ON

N = 3: ON when connected with a remote modem

1

O

ATO

Goes to data mode from on-line command mode.

—