User's Manual

42 Interface specification: How to turn the radio on and off
Integrator’s Guide – RIM 902M OEM Radio Modem
Pin 21 RX Receive
This is an output from the radio. Its idle (no data) state is high.
This line is an asynchronous serial output from the radio unit, and should be
connected to the host terminal’s Receive Data input. This line carries data at
9600 bits per second. MASC parameters are 7 bits, Even parity, 1 stop bit. RAP
parameters are 8 bits, No parity, 1 stop bit.
How to turn the radio on and off
The TURNON pin is a digital signal that turns the raido on and off. It
eliminates the need for a power switch across the power supply to the radio.
Turning the radio on
To turn the RIM 902M on, the software should first check the ONI pin. If ONI
is high, but TURNON is being held low, then your application has recently
requested the radio to shut down, and the radio is performing shutdown
operations and should not be disturbed. Wait for ONI to go low before
continuing.
If ONI is low, this indicates the radio is turned off. Set the TURNON line high
to turn the radio on. The ONI pin will respond by going high, typically within 2
seconds. Once the ONI pin is high, other handshaking and communication
signals can begin.
If the radio fails to respond to a high TURNON line, the radio may require
service, or the power supplied to the radio may be too low for proper operation.
Turning the radio OFF
To turn the RIM 902M off, your software should de-assert the TURNON line
by setting it low. The radio will then begin shutdown operations, and the ONI
pin will remain active until all shutdown operations are complete.