ARF7419A ADEUNIS, ARF7419A Datasheet - Page 12

• Manufacturer Part Number: ARF7419A
• Description: MODULE, ARF44
• Manufacturer: ADEUNIS
• Type: Modem Moduler

Specifications of ARF7419A

• Modulation Type: FM
• Data Rate Max: 19.5Kbps
• Sensitivity: -103dBm
• Supply Current: 36mA
• Features: Two-way Digital Link Over 300m, 19.2kbps UART Data Rate, Data Transmission Via UART Serial Interface
• Rohs Compliant: Yes

RF44
A
User Guide
Powerdown Mode
In powerdown mode, the power consumption is reduced to reach less than
3µA. In this state, the module is not able to receive or transmit any data and
is not able to enter command mode.
The powerdown mode is controlled by pin 4 of the module. This pin is tied to
VCC when in transceiver or command mode. If powerdown mode is not used,
the pin can be leaved unconnected.
The powerdwon mode is entered by driving the powerdown pin to 0V. The
mode is activated by the detection of a high to low transition on this pin. The
powerdown state is reached after a typical delay of about 2ms. The pull up
on the pin is by passed during powerdown to get the better powerdown
consumption.
The powerdown mode is exited by actively driving the powerdown pin to
VCC. The mode is deactivated by the detection of a low to high transition on
this pin. The module is ready for sending new data after a typical delay of
3ms.
AT Commands
Description
AT commands are interpreted only when the transceiver is in
Command mode.
Command: are used to read and update the modem parameters
A command starts with the 2 ASCII ‘AT’ characters. ‘AT’ means ‘Attention’
follow with one or several characters or other data.
Each command is ended with <cr> (carriage return).
Response: is sent back for each command on the serial link.
The answer is :
‘O’<cr> (ASCII character 0x4F) for accepted command (or OK command)
‘E’<cr> for error
Specific string when specified
Ref. 08-07-V5-lmn
p. 10
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