4
Radio 148221 User Guide
The host device in which the module is installed shall have on its label, the statement “Contains IC: 25608-
RM148221” or if an electronic display is used, it will be available without need of password protection and will be
available in less than 3 steps from the main menu.
Installation Instructions
To satisfy ISED Canada RF exposure requirements, Radio 148221 must be used at a distance of greater than 20cm
from the user, with the following exceptions:
Radio 148221 requires a minimum separation distance of 24cm when used with the Yagi antenna
Radio 148221 requires a minimum separation distance of 22cm when used with the Whip dipole antenna
HOOKUP AND LAYOUT
Ratings
Min.
Nom.
Max.
Vin
4.5V
4.8V
5.2V
Din1
0V
-
3.3V
Dout1/2
0V
-
3.3V
TermTx/Rx
0V
-
3.3V
RSSI
0V
-
3.3V
Din1 is a Schmitt Trigger Input with min active Low voltage 0.7V and Active High voltage 2.5V.
Dout1/2 are push pull outputs.
RSSI uses 8bit 1 start 1 stop bit active low 460,800baud to transmit RSSI information in ascii format.
TermTxRx uses 8bit 1 start 1 stop bit active low 19,200baud to transmit and receive serial data over the air.
TermTx is in reference to the Host TX and TermRx is in reference to Host Rx.