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SEMICONDUCTOR TECHNICAL DATA
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MC68181 Technical Data
ROAMING FLEX™ chip SIGNAL PROCESSOR
The FLEX™ protocol is a multi-speed, high-performance protocol adopted by leading service
providers worldwide as a de facto paging standard. The FLEX protocol gives service providers
the increased capacity, added reliability, and enhanced pager battery performance they need
today. It also provides an upward migration path to the service provider that is completely
transparent to the end user.
The MC68181 Roaming FLEX™ chip IC is part of a total solution available from Motorola for
providing FLEX capabilities in a low-power, low-cost system. The FLEX™ chip simplifies
implementation of a FLEX paging device by interfacing with any of several off-the-shelf paging
receivers, and any of several off-the-shelf host microcontroller/microprocessors. The primary
function of the FLEX™ chip is to process information received and demodulated from a FLEX-
radio paging channel, select messages addressed to the paging device, and communicate the
message information to the host. The host controls receiver channel selection, and interprets the
message information in an appropriate manner (numeric, alphanumeric, binary, etc.) and
handles all the I/O activity. The FLEX™ chip IC also operates the paging receiver in an efficient
power consumption mode and enables the host to operate in a low power mode when
monitoring a single channel for message information. Figure 1 shows the MC68181 functional
Figure 1 MC68181 Functional Block Diagram
This document contains information on a new product. Specifications and information herein are subject to change without notice.
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