RFM67W Datasheet, PDF (11/37 Pages) List of Unclassifed Manufacturers – ISM TRANSMITTER MODULE

ADVANCED COMMUNICATIONS & SENSING
RFM 67W
DATASHEET
100k
100 nF
3V
100 nF ^CTX
PB(3:0)
VBAT E2_MODE
NSS
Hold
CS
VCC
Match
L_M
10 nF
RFOUT
RF67
VR_PA
XTA XTB
MISO
MOSI
SCK
VR_ANA
VR_DIG
GND
SO
SI
SCK
SPI
EEPROM
WP
VSS
100 nF 100 nF
15 pF 32 MHz 15 pF
Figure 3. RFM67W Stand-Alone Application Circuit
4.2.2. MCU Mode
The RFM67W is also capable of operating in a conventional MCU controlled mode. Figure 4 shows the RFM67W
operating in MCU mode and connected to an external microcontroller. Note that CLKOUT provides the oscillator signal
for the MCU, thus negating the need for two crystal oscillators. The DCLK connection is also optional - only being
required if the data rate is to be determined by RFM67W or transmit filtering is to be used.
Match
L_M
10 nF
EOL
100 nF
VCC
PB(3:1)
PB0 VBAT
CLKOUT
DATA
DCLK
RFOUT
RF67
VR_PA
XTA XTB
MISO
MOSI
SCK
NSS
VR_ANA
VR_DIG
GND MODE
OSC1
IO
IO
SI
SO
SCK
CS
100 nF 100 nF
MCU
VSS
15 pF 32 MHz 15 pF
100 nF
3V
C_TX
Figure 4. RFM67W MCU Mode Application Circuit
Page 11
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