CH1782A 데이터 시트보기 (PDF) - Cermetek Microelectronics

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CH1782A

Family of Ultra Small Modem Modules V.22bis-2400bps

Cermetek Microelectronics 

Cermetek Microelectronics, Inc.

The escape sequence consists of a “guard time” (a

period where no characters are sent to the modem),

followed by 3 escape characters, followed by another

guard time. The guard time is set by register S12.

The escape character code is set in register S2. At

power-up, the guard time is set to 1 second minimum,

and the escape character is set as “+.” There is no

minimum delay between characters but the maximum

delay is set by register S12.

The CH1782A will stay off-hook with its carrier on

after the escape sequence is received. It will return

an OK status message when it is ready to accept

commands. The CH1782A may be put into data

mode by issuing the command ATO<CR>.

Table 4. CH1782A Register Summary

Register Function

S0*

Ring to Answer On

S1

Ring Count

S2

Escape Code Character

S3

Carriage Return Character

S4

Line Feed Character

S5

Back Space Character

S6

Wait For Dial Tone

S7

Wait Time for Data Carrier

S8

Pause Time for Comma

S9

Carrier Detect Response Time

S10

Lost Carrier to Hang-up Delay

S11

DTMF Dialing Speed

S12

Escape Code Guard Time

S14*

Bit Mapped Options Register

S16

Modem Test Options

S18*

Test Timer

S21*

Bit Mapped Options Register

S22*

Bit Mapped Options Register

S23*

Bit Mapped Options Register

S24

Sleep Mode Inactivity Time

S25*

Delay to DTR

S27*

Bit Mapped Options Register

S28*

Bit Mapped Options Register

NOTES

In Tables 4 and 5 an * signifies parameters that

are stored in NVRAM upon receipt of the &W

command. As such, these parameters will be

retained in memory after power down. A detailed

definition of all commands and registers is

available from Cermetek Microelectronics, Inc.

Refer to Cermetek Document AT Commands and

S-Registers Reference Guide or access our

website at www.cermetek.com.

CH1782A Family of Ultra Small Modem Modules V.22bis-2400bps

Table 5. CH1782A AT Command Set Summary

Basic

Function

Commands

AT

Attention Code

A

Answer Command

A/

Repeat Last Command

Bn*

Communications Standard Option

C

Squelch Transmitter

D

Dial Command

E*

Off-Line Character Echo Option

Hn

Switch Hook Control Option

Ln*

Speaker Volume Option

Mn*

Speaker Control Option

On

On-Line Command

P

Pulse Dial

Qn*

Result Code Display Option

Sn

Select an S Register

Sn=

Write to an S Register

Sn?

Read an S Register

Vn*

Result Code Form Option

Xn*

Result Code Set/Call Progress Option

+++

Escape Code Sequence

,

Pause

?

Returns Last Addressed S Register

Yn*

Long Space Disconnect Option

Fn

On Line Echo Character Option

Z

Reset

Dial Modifiers Function

P

Pulse Dial

R

Originate Call in Answer Mode

T

Touch Tone Dial

W

Wait for Dial Tone

;

Return to Idle State

@

Wait for Quiet Answer Command

!

Flash Hook

,

Pause

0-9

Dial Digits/ Characters

A,B,C,D

Ampersand Function

Commands

&Cn*

Data Carrier Detect Option

&Dn*

Data Terminal Ready Option

&F

Load Factory Defaults

&Gn*

Guard Tone Option

&Pn*

Make to Break Ratio Selection

&Sn*

Data Set Ready Option

&Tn

Test Command Option

&V

View Active Configuration

&Wn*

Store Active Profile

Yn*

Recall Active Profile

&Zn*

Store Telephone Numbers

Percent

Function

Commands

%Dn

DTMF Attenuation

%J

Load Secondary Factory Defaults

2002 Cermetek Microelectronics, Inc.

Page 8

Document No. 607-0009 Revision C (01/03)

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