MSK Modem
3
MX809
1 Block Diagram
RECOVERED
CLOCK
CHECKSUM
GEN/CHECK
VDD
BYTE COUNTER
TX OUT
RX IN
MSK
MSK
TRANSMITTER
DATA REGISTER 1
DATA REGISTER 2
RECEIVER
RECOVERED
CLOCK
VBIAS
XTAL/
SYNC/SYNC
DETECT
CLOCK
RX SYNC
DETECT
RX SYNC
DETECT
CLOCK
GENERATOR
XTAL
AMP IN
RX FREEFORMAT
CS
RX DATA BUFFER
TX DATA BUFFER
_
+
RX DATA
READY
TX DATA
READY
TX IDLE
AMP OUT
REPLY
DATA
INTERRUPT
ENABLE
UNCOMMITTED
AMPLIFIER
SYNC PROGRAM
C-BUS
LOW
- HIGH
VBIAS
INTERFACE
8-BIT PARALLEL BUS
SERIAL
CLOCK
VSS
AND
RX SYNC
DETECT
RX SYNC
DETECT
CONTROL
LOGIC
COMMAND
DATA
ADDRESS
DECODER
STATUS
REGISTER
INTERRUPT
GENERATOR
CONTROL
REGISTER
WAKE
IRQ
ADDRESS
SELECT
Figure 1: Block Diagram
ꢀ1998 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480036.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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