MX429A Ver la hoja de datos (PDF) - MX-COM Inc
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MX429A Datasheet PDF : 20 Pages
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DATA BULLETIN
MX429A 1200/2400bps MSK Modem
for Trunked Radio Systems
Features
Band III & General Purpose Trunked Radio
Apps
Full-Duplex 1200 and 2400 Baud Operation
Error Check Word Generation and Checking
Preamble Generation
µProcessor Compatible Interface
Frame SYNC and SYNT
Detection
Low Power Consumption
General Purpose Timer
CARRIER DETECT
TIME CONSTANT DATA
RECEIVER INPUT
MSK
RECEIVER
1200/2400 BAUD
MICROPROCESSOR
INTERFACE
STROBE
R/W
RX CARRIER
DETECT
DATA
A1
A0
D7
D6
8-BIT uP BUS
D5
D4
D3
D2
D1
D0
VBIAS
VSS
VDD
CLOCKS
XTAL/CLOCK
XTAL
CLOCK
GENERATORS
1.008 MHz
OUTPUT
SYNC/SYNT
DETECTOR
BYTE
COUNTER
RECOVERED CLOCK
CHECKSUM
CHECKER
RX DATA
REGISTER
RX DATA
BUFFER
8-BIT uP BUS
CONTROL
REGISTER
RX ENABLE
TX ENABLE
RX MESSAGE FORMAT
TX PARITY ENABLE
TX DATA
BUFFER
TX DATA
REGISTER
TIMER
BYTE
COUNTER
RX MESSAGE FORMAT
RX CHECKSUM TRUE
STATUS
REGISTER
SYNC
SYNT
RX DATA READY
RX CARRIER DET.
RX CHECKSUM TRUE
TX DATA READY
TX IDLE
TIMER EXPIRED
CHECKSUM
GENERATOR
TX PARITY
ENABLE
TRANSMITTER
MSK
OUTPUT
TRANSMITTER
RX DATA RDY
TX DATA RDY
SYNC
SYNT
TX IDLE
INTERRUPT IRQ
GENERATOR
The MX429A is a single-chip CMOS 1200 and 2400 baud MSK modem, designed primarily for use in Trunked
Radio Systems but may also be employed in other general purpose radio or line data communication
applications. The device has been designed to conform to the UK Band III trunked radio protocols MPT
1317/1327.
The MX429A is full duplex at 1200 and 2400 baud and includes an 8-bit parallel microprocessor interface and
a programmable timer which may be set for interrupt periods of 8 to 120 bits. Preamble may be generated by
the device in transmit. The 16-bit SYNC or SYNT words are detected in receive. An error check word is
automatically generated in transmit and error checking is performed in the receive mode. An on-chip
Xtal/clock generator requiring an external 4.032MHz Xtal or clock input provides both 4.032MHz and
1.008MHz outputs and performs all modem timings.
The MX429A requires a single 5-volt power supply, has a powersave facility, and is available in the following
package styles: 24-pin CDIP (MX429AJ), 24-pin PDIP (MX429AP), and 24-pin PLCC (MX429ALH).
© 1998 MX-COM Inc.
www.mxcom.com Tel: 800 638-5577 336 744-5050 Fax: 336 744-5054
Doc. # 20480128.007
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
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