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参数资料
| 型号： | CPC2400E-EVAL |
| 厂商： | IXYS Integrated Circuits Division |
| 文件页数： | 9/17页 |
| 文件大小： | 0K |
| 描述： | MODULE MODEM 2400BAUD EMBEDDEDED |
| 标准包装： | 1 |
| 主要目的： | 电信，调制解调器 |
| 已用 IC / 零件： | CPC2400E |
| 已供物品： | 板 |
I NTEGRATED C IRCUITS D IVISION
AT Command Set
CPC2400E
Command
&D
E
Function and Description
Data Terminal &D determines how the modem responds to the DTR signal from the terminal. The country Ready
Options con?guration may prevent the modem from detecting terminal DTR. In this case, the modem assumes DTR
is always on. In North America, terminal DTR is normally detected. If DTR detection has been prevented, the modem
will respond with an ERROR result to this command.
The response to changes in DTR also depends on the &Q and &D commands. This table de?nes what happens
when DTR goes off for all possible combinations of the &D and &Q commands. To see what happens when DTR
goes on refer to the &Q command. The default value is &D0 in North America:
&D0 &D1 &D2 D3
&Q0 None B C D
&Q1 A B C D
A The modem hangs up the telephone line and issues an OK result code.
B If in the On-Line state, the modem goes into the Command state and issues an OK result code.
C The modem hangs up the telephone line and issues an OK result code. Auto-Answer is disabled as
long as DTR stays off.
D The modem resets.
Command Mode E tells the modem whether or not to echo characters sent from the terminal when the modem is
Character Echo accepting AT commands.
E0 Does not echo characters sent from the terminal.
E1
Echo characters sent from the terminal. This is the default value in North America.
%E
Automatic Retrain The %E command controls whether the modem will initiate retrain with the other modem during a telephone line
Options
connection during operation in data modes supporting retrain. The modem always responds to a retrain operation
initiated by the remote modem. The modem can be forced to initiate a retrain by the On-Line (O1) command.
%E0 Do not initiate a retrain.
%E1
Initiate a retrain if the datapump indicates one is required.
&F
&G
Recall Factory
Pro?le
Guard Tone
Options
&F changes these AT command options and S-registers to their default values. The default values may be changed
for use in different countries. The values for North America are:
S-registers
S0=0 S1=0 S2=43 S3=13 S4=10 S5=8
S6=2 S7=30 S8=2 S9=6 S10=14 S11=95
S12=50 S17=10 S25=5 S28=0 S29=25 S37=0
Commands
B1 E1 M1 P Q0 V1 X4 &C0 &D0 &G0 &P0 &Q0 %E1
&G tells the modem which guard tone to transmit when the modem is transmitting the high band (i.e., answer
handshake and answer mode).
&G0
No guard tone. This is the default value in North America.
&G1
550 Hz guard tone (V.22 and V.22bis only)
&G2
1800 Hz guard tone (V.22 and V.22bis only)
R03
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