Serial interface specification: Detailed pin description
RIM 801D OEM Radio Modem – Integrator’s Guide
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Detailed pin description
This section describes the purpose of each of the 14 lines that comprise the
serial interface of the RIM 801D OEM radio modem.
Note that any unused inputs should be tied to ground (with the exception of
DNC1 and DNC2).
Pin
Label
Source
Active
Description
1
DNC1
RAD
Do not connect to VCC or GND
2
RX
Radio
Serial Data output from Radio to Host
3
TX
Terminal
Serial Data input to the Radio from Host
4
DTR
Terminal Low
Data Terminal Ready input to Radio from Host
5
SG
N/A
Signal Ground (Internally connected to Pin 14)
6
DSR
Radio
Low
Data Set Ready output from Radio to Host
(Internally connected to PIN 4)
7
RTS
Terminal Low
Request to Send input to Radio from Host
8
CTS
Radio
Low
Clear to Send output from Radio to Host
9
RI
Radio
Low
Ring Indicator output from Radio to Host
10
DNC2
Terminal
Do not connect to VCC or GND
11
TRI
Radio
High
Transmit Indicator Output from Radio to Host
12
ONI
Radio
High
On Indicator Output from Radio to Host
13
TURNON
Terminal High
Turn On input to Radio from Host
14
SG
N/A
Signal Ground (Internally connected to Pin 5)
Table 1: Serial Interface Pin-out and Description
DNC1 and DNC2
These are “Do Not Connect” pins. They are used for internal testing of
the Radio hardware by RIM. Connecting these pins to VCC or Ground can
damage the radio. Simply leave these pins disconnected when integrating
the radio modem into your device.
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