Product Info

Note: You can’t use USB to TTL 3.3V or 5V power supply, it is
recommended to use two dry batteries or after conversion
through the LDO 3.3V, it is strongly recommended to buy a new
development board.
图 4.1 典型应用
4.2 GPIO Level Conversion
Figure 4.2 GPIO Level Conversion
4.3 Power Supply Reference Design