High Speed GMSK Modem 4k to 64kbps
Page 3 of 20
MX589
1
Block Diagram
TX ENABLE
TX PS
VBIAS
TX
FILTER
VBIAS
DATA RETIME &
LEVEL SHIFT
TX DATA
TX OUT
XTAL/CLOCK
TX CLK
XTAL
RX DATA
RX DATA
DETECTION
ClkDIVA
ClkDIVB
CLOCK
DIVIDER
BT
VDD
RX S/N
DETECTION
RX S/N
RX CLK
RXHold
PLLacq
RX CIRCUIT
CONTROL
RXDCacq
RX CLOCK
VSS
VBIAS
RX PS
VBIAS
+
-
RX
FILTER
RX DC LEVEL
MEASURE
RX SIGNAL IN
RX FEEDBACK
DOC1
DOC2
Figure 1: Block Diagram
RX Frequency
Discriminator
Frequency
Modulator
DC Level
Adjust
RX Filter
and Gain
RX Sig In
Signal and
DC Level
Adjustment
RX Feedback
TX Out
TX circuits
RX circuits
RXD
RXC
TXD
TXC
RX Data
RX Clock
TX Data
TX Clock
TX Out
Filter
uController
or UART
MX589
GMSK MODEM
Figure 2: System Block Diagram
2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 204800103.011
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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CMLMICRO [ CML MICROCIRCUITS ]
