7
7.
Interfacing and
controlling the RIM
801D
The RIM 801D OEM radio modem is designed to be used easily in an
embedded system. This chapter presents schematics for an RS232 interface,
a micro-controller, and a serial port interface. The following schematics can
be used as starting points for more complex designs.
Interfacing to an RS232 device
The RIM 801D serial interface operates at HCMOS electrical levels,
making it compatible with many existing system designs. In most cases, the
RIM 801D can be connected directly to a micro-controller without any
additional interface logic. If the radio modem is to be connected directly to a
PC or other RS232 device, an interface must be provided. An RS232
interface design example is provided in Figure 12.
