Rfm12b, Typical application, Pin definition – Rainbow Electronics RFM12B User Manual
Page 2: Electrical parameter, Maximum （ not at working mode
RFM12B
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Typical Application：
• Remote control
• Remote sensor
• Wireless data collection
• Home security system
• Toys
• Tire pressure monitoring system
Pin Definition：
SMD DIP
definition Type Function
nINT/VDI
DI/ DO
Interrupt input (active low)/Valid data indicator
VDD S
Positive
power
supply
SDI
DI
SPI data input
SCK
DI
SPI clock input
nSEL
DI
Chip select (active low)
SDO
DO
Serial data output with bus hold
nIRQ DO
Interrupts request output（active low）
FSK/DATA/nFFS
DI/DO/DI
Transmit FSK data input/ Received data output (FIFO not used)/ FIFO
select
DCLK/CFIL/FFIT DO/AIO/DO Clock
output (no FIFO )/ external filter capacitor(analog mode)/ FIFO
interrupts(active high)when FIFO level set to 1, FIFO empty
interruption can be achieved
CLK
DO
Clock output for external microcontroller
nRES DIO
Reset output（active low）
GND S
Power
ground
Electrical Parameter：
Maximum（not at working mode）
symbol parameter
minimum maximum Unit
V
dd
Positive
power
supply
-0.5
6.0
V
V
in
All pin input level
-0.5
Vdd+0.5
V