User Manual

Serial interface specification: Detailed pin description
RIM 801D OEM Radio Modem – Integrator’s Guide
19
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.
!