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.