
1998 Jun 17
6
Philips Semiconductors
Product specification
FLEX
Pager Decoder
PCD5008
Fig.2 Pin configuration.
handbook, full pagewidth
PCD5008H
MGK257
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
9
1
1
1
1
1
1
1
3
3
3
2
2
2
2
2
TOUT0
OSCPD
VDD1
TEST2
XTAL
EXTAL
VSS1
TEST3
T
L
E
E
S
S
S
V
TOUT2
S5
S3
S1
S2
S0
S4
RESET
T
S
V
M
M
C
R
S
8
FUNCTIONAL DESCRIPTION
8.1
General
The PCD5008 simplifies implementation of a FLEX
paging device by interfacing with off-the-shelf components
such as a paging receiver and a microcontroller or
microprocessor (called a host). The PCD5008 is fully
compatible with FLEXstack
software which provides a
complete, platform independent, software driver for the
PCD5008.
The PCD5008 fully supports all non-roaming aspects of
the FLEX
protocol (version G1.8), and can operate in
either single-phase or any-phase mode. The PCD5008
supports FLEX
dynamic grouping, allowing up to
16 temporary addresses to be enabled simultaneously.
It is also capable of retrieving real time information from a
FLEX
channel.
The PCD5008 connects to any receiver capable of
providing a 2-bit digital signal. The PCD5008 operates the
paging receiver in an efficient power consumption mode.
The PCD5008 has 8 receiver control lines used for
warming up, operating and shutting down a receiver in
stages.
The PCD5008 has the ability to detect a battery-low signal
from an external detector during the receiver control
sequences.
The PCD5008 carries out the following functions:
Synchronises to a FLEX
data stream
Processes received, demodulated information
Performs de-interleaving and error correction
Selects calls addressed to the paging device using up to
16 programmable addresses
Communicates the message information to the host.