GENERAL DESCRIPTION

This data sheet describes the operation of the PCD5008 integrated paging decoder. It is fully compatible with the Motorola FLEXchip? IC.

The PCD5008, also referred to as the decoder, simplifies implementation of a FLEX? paging device, by being able to interface with several off-the-shelf paging receivers and host microcontrollers/processors. Its primary function 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.

FEATURES

? FLEX? paging protocol signal processor

? 16 programmable user address words

? 16 fixed temporary addresses

? 1600, 3200 and 6400 bits/s decoding

? Any-phase or single-phase decoding

? Uses standard serial peripheral interface (SPI) in slave mode

? Allows low current power-down mode operation of host processor

? Highly programmable receiver control

? Real-time clock time base

? FLEX? fragmentation and group messaging support

? Real-time clock over-the-air update support

? Compatible with synthesized receivers

? Low battery indication (external detector)

? Low cost LQFP32 plastic package

? Operates using a 76.8 kHz crystal

? Very low power consumption

? Operates at low supply voltage.

APPLICATIONS

? Numeric FLEX? pagers

? Alphanumeric FLEX? pagers

? Remote metering

? Car security systems

? Personal digital assistants.