1998 Jun 17
3
Philips Semiconductors
Product specification
FLEX
Pager Decoder
PCD5008
1
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.
2
APPLICATIONS
Numeric FLEX
pagers
Alphanumeric FLEX
pagers
Remote metering
Car security systems
Personal digital assistants.
3
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.
Motorola FLEXstack
software, installed on the product
host processor, communicates with the PCD5008 and
interprets the codewords that are passed to the host.
The PCD5008 operates the paging receiver in an efficient
power consumption mode and enables the host to operate
in a low-power mode when no message is being received.
4
QUICK REFERENCE DATA
5
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
DD
I
DD
T
amb
f
EXTAL
supply voltage
supply current
operating ambient temperature
external clock frequency
1.8
25
2.2
6.4
+25
76.8
3.6
+70
V
μ
A
°
C
kHz
see Sections 10 and 12
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
PCD5008H
LQFP32
plastic low profile quad flat package; 32 leads; body 7
×
7
×
1.4 mm
SOT358-1