Data Sheet

2 Module interfaces
Pin number Symbol Type Function
1 VBAT P Power supply pin
(3.3V)
2 P25 I/O GPIO_25, hardware
PWM, correspond
to Pin 7 of the IC
3 GND P Power supply
reference ground
4 P24 I/O GPIO_24, hardware
PWM, correspond
to Pin 8 of the IC
5 RX I/O GPIO_5,
UART0_RXD (user
serial interface)
6 P22 I/O GPIO_22, hardware
PWM, Pin 4 of the
IC
7 TX I/O GPIO_6,
UART0_TXD (user
serial interface)
8 ADC AI GPIO_20, common
GPIO, which can
be used as ADC.
The range of input
voltage is 0 to
3.3V. Correspond
to Pin 27 of the IC.
9 P15 I/O GPIO_15, hardware
PWM, Pin 28 of the
IC
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