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I2C Spi Lcd Backpack
AdafruitN/A
A backpack for controlling character LCDs via I2C or SPI, reducing pin usage to 2-3 pins.
In stock
Specifications
2- Operating Voltage
- 3-5V DC (VIN) with a 3-5V boost circuit onboard for controlling 5V LCDs even with 3V power and logic.
- Logic Level
- 3-5V
Pinout
17| Pin | Name | Functions | Notes |
|---|---|---|---|
| 3 | VIN | POWER | 3-5V boost circuit onboard |
| 8 | GND | GND | Common ground for data and power |
| 15 | A0 | — | Address jumper, sets the lowest bit of address |
| 16 | A1 | — | Address jumper, sets the next bit of address |
| 22 | A2 | — | Address jumper, sets the next bit of address |
| 30 | CLK (SCL) | I2C | Level shifted for 3-5V logic with a 10K pullup |
| 30 | DAT (SDA) | I2C | Level shifted for 3-5V logic with a 10K pullup |
| 4 | MCP2308 I/O Pin | GPIO | Connected to backpack pins 6, 11, 12, 13, 14 and 15 with optional pull-ups |
| 6 | MCP2308 I/O Pin | GPIO | Connected to backpack pins 4, 6, 11, 12, 13, 14 and 16 with optional pull-ups |
| 11 | MCP2308 I/O Pin | GPIO | Connected to backpack pins 4, 6, 11, 12, 13, 14 and 16 with optional pull-ups |
| 12 | MCP2308 I/O Pin | GPIO | Connected to backpack pins 4, 6, 11, 12, 13, 14 and 16 with optional pull-ups |
| 13 | MCP2308 I/O Pin | GPIO | Connected to backpack pins 4, 6, 11, 12, 13, 14 and 15 with optional pull-ups |
| 14 | MCP2308 I/O Pin | GPIO | Connected to backpack pins 4, 6, 11, 12, 13, 14 and 15 with optional pull-ups |
| 16 | MCP2308 I/O Pin | GPIO | Connected to backpack pins 4, 6, 11, 12, 13, 14 and 15 with optional pull-ups |
| 4 | SPI CLK (SCK) | SPI | Used for SPI clock input |
| 16 | SPI DAT (MOSI) | SPI | Used for SPI MOSI data output |
| 15 | SPI LAT | SPI | Latches the received data to the output lines on the shift register |
Interactive pinout
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