MSK Modem
3
MX809
1 Block Diagram
RECOVERED
CLOCK
CHECKSUM
GEN/CHECK
V
DD
BYTE COUNTER
TX OUT
RX IN
MSK
RECEIVER
RECOVERED
CLOCK
DATA REGISTER 1
DATA REGISTER 2
ä
MSK
TRANSMITTER
XTAL/
CLOCK
XTAL
CLOCK
GENERATOR
ä
RX SYNC
DETECT
SYNC/SYNC
DETECT
ä
ä
V
BIAS
RX SYNC
DETECT
AMP IN
TX DATA BUFFER
_
ä
RX FREEFORMAT
RX DATA BUFFER
CS
REPLY
DATA
SERIAL
CLOCK
COMMAND
DATA
WAKE
INTERRUPT
ENABLE
RX DATA
READY
TX DATA
READY
TX IDLE
+
UNCOMMITTED
AMPLIFIER
AMP OUT
C-BUS
INTERFACE
AND
CONTROL
LOGIC
SYNC PROGRAM
LOW - HIGH
V
BIAS
ä
ä
8-BIT PARALLEL BUS
ä
V
SS
ADDRESS
DECODER
ADDRESS
SELECT
ä
RX SYNC
DETECT
RX SYNC
DETECT
ä
CONTROL
REGISTER
Figure 1: Block Diagram
ä
STATUS
REGISTER
INTERRUPT
GENERATOR
IRQ
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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