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| MC68HC908RF2 Datasheet, PDF (230/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit | |||
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PLL Tuned UHF Transmitter Module
VCC
TO MCU
C6
Y1
C9
R2
DATACLK
MODE
DATA
ENABLE
BAND
GND
VCC
GNDRF
XTAL1
RFOUT
XTAL0
REXT
VCC
CFSK
VCC
MATCHING
NETWORK
ANTENNA
C7 C8
Figure 16-5. Application Schematic in FSK Modulation,
315-MHz and 434-MHz Frequency Bands
Table 16-3. Component Description
Component
Function
Value
Unit
315-MHz band: 9.84, see Table 16-5 MHz
Y1
Crystal
434-MHz band: 13.56, see Table 16-5 MHz
868-MHz band: 13.56, see Table 16-5 MHz
R2
RF output level setting resistor (REXT)
12
kâ¦
C6
Crystal load capacitor
OOK modulation: 18
pF
FSK modulation: 22
pF
C7
10
nF
Power supply decoupling capacitor
C8
100
pF
C9
Crystal pulling capacitor for FSK modulation only see Table 16-5
pF
Advance Information
230
PLL Tuned UHF Transmitter Module
MC68HC908RF2 â Rev. 1
MOTOROLA
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