Data Sheet

3 MODULE INTERFACES
Pin Number Symbol I/O Type Function
2 NC I/O It is pulled up to
be compatible
with other
modules
3 EN I/O Enabling pin,
which works at
the high level and
is pulled up and
controlled by a
user externally
4 A_20 I/O GPIOA_20, GPIO,
IC Pin1
5 A_2 I/O GPIOA_2,
hardware PWM, IC
Pin18
6 A_3 I/O GPIOA_3,
hardware PWM, IC
Pin19
7 A_4 I/O GPIOA_4,
hardware PWM, IC
Pin20
8 VD33 P Power supply pin
(3.3V)
9 GND P Power supply
reference ground
10 A_15 I/O GPIOA_15,
UART_Log_RXD,
This pin can be
used as GPIO.
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