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CML Semiconductor Products
PRODUCT INFORMATION
FX529
Features
PAA 1382 and General Purpose
Trunked Radio Applications
Meets ETSI I-ETS 300 230 Binary
Signalling Specification
Full-Duplex 1200 Baud Operation
High Intelligence
Error Checking in Receive
FFSK Modem for
T runked Radio Systems
Product Summary
Frame SYNC/SYNT Detection
Preamble Generation
µProcessor Compatible Interface
Carrier Detection On-Chip
General Purpose Timer
Error Check Word Generation
CARRIER DETECT
TIME CONSTANT
RECEIVER INPUT
MICROPROCESSOR
INTERFACE
STROBE
R/W
A
1
A
0
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5
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3
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2
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1
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0
1200/2400 Baud
V
DD
V
BIAS
XTAL/CLOCK
XTAL
V
SS
FFSK
RECEIVER
Rx CARRIER
DETECT
8-bit µP BUS
CLOCKS
CLOCK
GENERATORS
DATA
DATA
1.008 MHz
OUTPUT
SYNC/SYNT
DETECTOR
Rx DATA
REGISTER
Rx DATA
BUFFER
RECOVERED CLOCK
CONTROL
REGISTER
Rx ENABLE
Tx ENABLE
Rx MESSAGE FORMAT
Tx PARITY ENABLE
BYTE
COUNTER
TIMER
Brief Description
The FX529 is a single-chip CMOS 1200 baud FFSK
Modem, designed primarily for use in trunked radio
systems but may also be employed in other general
purpose radio or line data communication applications.
This device conforms to both the PAA 1382 French
trunked radio, and the proposed ETSI
I-ETS 300 230 “Binary Interchange of Information and
Signalling” specifications.
The FX529 is full duplex at 1200 baud and includes
an 8-bit parallel microprocessor interface and a
programmable timer which may be set for interrupt
periods of between 8 and 120 bits.
Preamble data and an error-check word are
automatically generated in the transmit mode.
Error checking is performed and the 16-bit SYNC
CHECKSUM
COUNTER
HI
Tx DATA
BUFFER
Tx DATA
REGISTER
COUNTER
BYTE
Rx MESSAGE FORMAT
Rx CHECKSUM TRUE
STATUS
LO
REGISTER
CHECKSUM
GENERATOR
FFSK
TRANSMITTER
Rx DATA RDY
Tx DATA RDY
SYNC
SYNT
Tx IDLE
SYNC
SYNT
Rx DATA READY
Rx CARRIER DETECT
Rx CHECKSUM TRUE
Tx DATA READY
Tx IDLE
TIMER EXPIRED
Tx PARITY
ENABLE
TRANSMITTER
OUTPUT
INTERRUPT
GENERATOR
IRQ
FX529
(“1011010000110011”) or SYNT
(“0100101111001100”) word detected in the receive
mode.
An on-chip Xtal/clock generator requiring an
external 4.032MHz Xtal or clock input provides all
microcircuit filter sampling clocks and modem timings
whilst also supplying a “Clock “ 4” output (1.008MHz).
Pin and function compatible with the FX429, the
FX429 data sheet should be consulted when using this
device
The FX529, which has a powersaving facility,
requires a single 5-volt power supply and is available
in both cerdip DIL and plastic SMD packages.
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FX529 - Brief Specification
Function FFSK Modem for trunked radio systems
Supply Voltage Range 4.5 to 5.5 volts
Supply Current (5.0V) 7.0 mA maximum
Control 8-bit parallel
Duplex Full
Data Rate 1200 baud
Xtal/Clock Frequency 4.032 MHz
Package Styles 24-pin cerdip DIL (FX529J)
24-pin PLCC (FX529LG)
24-pin PLCC (FX529LS)
V
DD
V
BIAS
TRANSMIT OUTPUT
RECEIVE INPUT
V
DD
'CD' TIME CONSTANT
XT AL/CLOCK
XT AL
D
D
D
D
1
2
3
4
5
6
FX529J
7
8
0
9
1
10
2
11
3
12
24
23
22
21
20
19
18
17
16
15
14
13
CLOCK
4
V
SS
IRQ
A
2
STROBE
A
1
A
0
D
7
D
6
D
5
D
4
V
SS
D
D
V
SS
0
MICROPROCESSOR DATA INTERFACE
D
1
2
Package Styles Available
FX529J 24-pin cerdip DIL (J4)
FX529LG 24-pin quad plastic encapsulated
bent and cropped (L1)
FX529LS 24-lead plastic leaded
chip carrier (L2)
Full details of this product are available from CML or its distributors
CML does not assume any responsibility for the use of any circuitry described. No circuit patent licences are implied
and CML reserves the right at any time without notice to change the said circuitry.
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