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MC68181 Datasheet

  • MC68181

  • Freescale Semiconductor, Inc [Advance Information ROAMING F...

  • 643.92KB

  • FREESCALE

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Freescale Semiconductor, Inc.
SEMICONDUCTOR TECHNICAL DATA
O O O
Order this document by:
MC68181 Technical Data
MC68181
Advance Information
ROAMING FLEX鈩?chip SIGNAL PROCESSOR
The FLEX鈩?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鈩?chip IC is part of a total solution available from Motorola for
providing FLEX capabilities in a low-power, low-cost system. The FLEX鈩?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鈩?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鈩?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
block diagram.
EXTS0
EXTS1
SYMCLK
Internal Control
Unit
External
Control
Unit
RESET
Freescale Semiconductor, Inc...
2 V
dd
Symbol Sync
Noise Detector
2 V
ss
Sync Correlator
XTAL
EXTAL
OSCPD
76.8 kHz
Oscillator
LOBAT
De-Interleaver
Error
Corrector
Control/Status
Registers
CLKOUT
Clock
Address
Comparator
Local Message
Filter
READY
8
S0鈥揝7
Receiver
Control
SPI Buffer
SPI
4
SPI
AA0813
Figure 1
MC68181 Functional Block Diagram
This document contains information on a new product. Specifications and information herein are subject to change without notice.
漏1996, 1997 MOTOROLA, INC.
For More Information On This Product,
Go to: www.freescale.com

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