Data Sheet

Wi-linktech Communication Technologies
(Shanghai) Co.,Ltd.
2020.03
www .w i - li nk te ch .c om
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3. Pin description
3.3 Pin assignment
Figure 3- 1 moudle pin diagram
3.2 Pin definition
PIN #
Pin name
type
describe
1
SWD
GND
SWI data/ General I/O/PWM5
2
SWCK
I/O
SWI clk/ General I/O/PWM4
3
BOOT
I/O
Mode selection（Running@Low,Burning@High)
4
HVOUT
I/O
Li battery/USB LDO out 2.8V，typically 1uF decouple cap
5
HVIN
I/O
Li battery/USB LDO in 3~5.5V，typically 4.7uF decouple
cap
6
GPIO1
I/O
General I/O/ADC5/PWM3/UART1_RX
7
GPIO0
I/O
General I/O/ADC4/PWM2/UART1_TX
8
GPIO19
I/O
General I/O/ADC2/UART0_RX(Burning interface)
9
GPIO18
I/O
General I/O/ADC3/UART0_TX(Burning interface)
10
VCC
POWER
VCC(1.8-3.6V)
11
GND
POWER
GND
12
ANT
Analog Output
Outgoing end of external RF antenna