Data Sheet

2 Module interfaces
Pin number Symbol Pin type Function
22 PD6 I/O Common I/O
interface, which
corresponds to P
27 of the IC
23 PD7 I/O Common I/O
interface, which
corresponds to Pin
26 of the IC
24 GND P Power supply
reference ground
25 VCC P Power supply pin
VCC (Typical value:
3.3V)
26 TX1 I/O Default burning
serial port,
transmitting pin
UART1_TX, which
can also be used
as a common I/O
interface and
corresponds to pin
1 of the IC
27 RX1 I/O Default burning
serial port,
receiving pin
UART1_RX, which
can also be used
as a common I/O
interface and
corresponds to Pin
2 of the IC
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