XCite™ OEM RF Module – Product Manual v1.1
Data Radio
System Components
Serial Communications
The XCite OEM RF Module interfaces to a host device through a CMOS-level asynchronous serial
port. Through its serial port, the XCite Module can communicate directly with any UART-
interfaced or RS-232/485/422 device. [Timing specifications illustrated in Figure 5]
UART-Interfaced Data Flow
Devices that have a UART interface can connect directly through the pins of the XCite OEM RF
Module as is shown in the figure below.
Figure 6.
Data Flow in a UART-interfaced environment
(Low-asserted signals distinguished with horizontal line over signal name.)
RS-232 and RS-485/422 Data Flow
The XCite Module can enable a host device to communicate wirelessly. To transmit, the host
device simply sends serial data to the XCite Module pins. The XCite Module then converts the
data into FCC-approved RF data. Once transmitted, the RF data can be detected by receiving
XCite Modules, checked for integrity and then sent to a receiving device.
Figure 7.
Data Flow in RS-232 and RS-485/422 environments.
(Low-asserted signals distinguished with a horizontal line over signal name.)
© 2004 MaxStream, Inc., Confidential and Proprietary
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