Data Sheet
4-Level FSK Modem Data Pump Page 6 of 47 MX919B PRELIMINARY INFORMATION
©2001 MX•COM, INC. www.mxcom.com Tele: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480170.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
1. Block Diagram
V
SS
V
BIAS
XTAL /
CLOCK
TXOUT
RXIN
Rx Input Amp
Tx Output Buffer
DOC1
DOC2
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
8
Tx
Tx Symbols Rx Symbols
Tx
Rx
Tx
Rx
RxEye
V
BIAS
µCONTROLLER
INTERFACE
DATA
BUS
BUFFERS
ADDRESS
AND
R/W
DECODE
CRC
GENERATOR/
CHECKER
FRAME
SYNC DETECT
Rx LEVEL/CLOCK
EXTRACTION
FEC
ENCODER/
DECODER
INTERLEAVE/
DE-INTERLEAVE
CONTROL
REGISTER
MODE
REGISTER
COMMAND
REGISTER
DATA
BUFFER
STATUS
REGISTER
DATA
QUALITY
REGISTER
RRC
LOW PASS
FILTER
CLOCK
OSCILLATOR
AND
DIVIDERS
RXAMPOUT
V
DD
XTAL
WR
RD
CS
IRQ
V
DD
V
BIAS
Rx
Figure 1: Block Diagram