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ManualsBrandsSparkfun Electronics ManualsMiscellaneous SensorsSparkFun TTL Fingerprint Scanner (GT-521F32)
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9
5.Pin Assignment
Touch IC Connector
No.
Name
Description
1
VDD
Power voltage that range is 3.3V
2
GND
Ground
3
ICPDA
Program mode：In-circuit programming data/address pin.
V
IL
= 0.66V, V
IH
= 2.64V
4
ICPCK
Program mode：In-circuit programming clock pin
Normal mode：It could be waked-up function from touch IC to V
IL
= 0.66V, V
IH
= 2.64V
UART Connector(Baud rate 9600~115200bps)
No.
Name
Description
1
TX
Transmitting serial data
V
IL
= 0.8V, V
IH
= 2V
2
RX
Receiving serial data
V
IL
= 0.8V, V
IH
= 2V
3
GND
Ground
4
VCC
Power voltage that range is from 3.3~6V
The definitions of touch interface are as follows, you have to connect with 3 pins
(VCC,GND,ICPCK), which can be working as touch function.
In fact, you just need to know ICPCK pin(pin4) as output pin(GPIO). It will output signal from
Low to HIGH voltage when your finger touches metal frame(called: Touch pad) and you can
get this signal with the MCU to control another devices. For instance, control GT module
with ICPCK or control what you want devices with ICPCK.