Notice:
👉1602 welding IIC module does not display, the module batch is different, the chip address is different, you can change the sample program test by yourself, 8574A address + write 0x7e, 8574 address + write 0x4e
👉 Model introduction: The soldered pin header can be matched with the 16p female socket, so that it can be plugged and replaced, or it is convenient and quick to directly solder it on the circuit board.
The IIC version welds the IIC module to the screen, so that 2 IO ports can be driven (original need more than 7 IO ports), saving IO ports.
Numbering | Symbol | Pin Description | Numbering | Symbol | Pin Description |
1 | VSS | Power ground | 9 | D2 | Data |
2 | VDD | Positive power supply | 10 | D3 | Data |
3 | VL | LCD Bias | 11 | D4 | Data |
4 | RS | Data / command selection | 12 | D5 | Data |
5 | R/W | Read / write option | 13 | D6 | Data |
6 | E | Enable signal | 14 | D7 | Data |
7 | D0 | Data | 15 | BLA | Backlight positive |
8 | D1 | Data | 16 | BLK | Backlight negative |