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參數資料
型號: MC68181
廠商: Motorola, Inc.
英文描述: Roaming FLEXchip(漫游式FLEX芯片)
中文描述: 漫游FLEXchip(漫游式FleX創建芯片)
文件頁數: 1/4頁
文件大?。?/td> 45K
代理商: MC68181
MOTOROLA
SEMICONDUCTOR PRODUCT INFORMATION
MC68181
MC68181P/D
1997 MOTOROLA, INC.
Product Preview
PRELIMINARY
Receiver
Control
S0–S7
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
MC68181 ROAMING FLEX chip IC
by leading service providers worldwide as a de facto roaming paging standard. Roaming FLEX
protocol gives service providers the increased capacity, added reliability, and enhanced pager
battery performance needed today, coupled with the ability to control a PLL synthesized
receiver to receive paging messages from a list of paging channels. 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 Roaming FLEX capabilities in a low-power, low-cost system. The Roaming FLEX chip
simplifies implementation of a Roaming FLEX paging device by interfacing with many standard
paging receivers, and host microcontroller/ microprocessors. The primary function of the
Roaming FLEX chip is to process information received and demodulated from a radio paging
channel, select messages addressed to the paging device, and communicate the message
information to the host. The host interprets the message information in an appropriate manner
(numeric, alphanumeric, binary, etc.) and handles all the I/ O activity. The Roaming 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 message information for the paging device is not
being received.
Figure 1
Roaming FLEX chip IC Functional Block Diagram
76.8 kHz
Osc
Clock
Symbol Sync
Sync Correlator
De-Interleaver
Address
Comparator
Noise Detector
Internal Control
Unit
Error
Corrector
Local Msg Filter
Control/Status
Registers
External
Control
Unit
EXTS0
EXTS1
SYMCLK
XTAL
EXTAL
CLKOUT
V
dd
V
ss
TEST
RESET
LOBAT
READY
SPI
8
4
AA0813
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