CMX969D5 MX-COM, Inc., CMX969D5 Datasheet - Page 4

• Manufacturer Part Number: CMX969D5
• Description: MOTIENT/ARDIS RD-LAP MDC4800 Modem
• Manufacturer: MX-COM, Inc.

MOTIENT
1 Block Diagram
¤ ¤ ¤ ¤ 2001 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
From FM
Demod
IRQ
WR
RD
CS
D0
D2
D3
D4
D5
D6
D7
A0
D1
A1
SM
/ARDIS
RXFB
XTAL
XTAL
RXIN
SM
RD-LAP
Rx Input Amp
V
Clock oscillator
and dividers
BIAS
www.mxcom.com Tel: [phone] 744 5050 Fax: [phone]
ADDRESS
BUFFERS
TM
DECODE
DATA
MDC4800 Modem
BUS
AND
R/W
Rx
Tx
Tx
Symbols
Figure 1: Block Diagram
8
LOW PASS
COMMAND
REGISTER
DE-INTERLEAVE
FILTER
DATA BLOCK
INTERLEAVE/
ENCODER/
DECODER
BUFFER
FEC
Rx LEVEL & TIMING EXTRACTION,
Rx DATA SYMBOL EXTRACTION
AUTO FRAME SYNC DETECT,
All trademarks and service marks are held by their respective companies.
4
REGISTER
STATUS
Rx
Tx
REGISTER
MODE
Rx
Symbols
V
BIAS
Tx
GENERATOR/
RxEye
REGISTER
QUALITY
CHECKER
DATA
Rx
CRC
Tx Output Buffer
REGISTER
CONTROL
CMX969 Advance Information
Doc. # 20480211.002
V
V
V
To FM Modulator
TXOUT
DD
BIAS
SS