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Adafruit Seesaw I2C Expander
AdafruitATSAMD09
The Adafruit Seesaw I2C Expander is a versatile converter framework that can add and extend hardware support to any I2C-capable microcontroller or microcomputer, providing various functionalities like GPIO, ADC, PWM, I2C, UART, and more.
In stock
Specifications
3- Operating Voltage
- 3.3V to 5V
- Logic Level
- 3.3V I2C, 10K pullup
- Gpio Count
- 7
Pinout
18| Pin | Name | Functions | Notes |
|---|---|---|---|
| Vin | Power Input | POWER | 3-5VDC input for power conversion to 3.3V |
| 3Vo | 3.3V Output | POWER | Up to 100mA output at 3.3V |
| GND | Ground | GND | Common ground for power and logic |
| 23 / SCL | I2C Clock | I2C | 10K pullup to 3.3V, open drain I2C |
| 22 / SDA | I2C Data | I2C | 10K pullup to 3.3V, open drain I2C |
| RST | Reset | GND | Pulling this pin to ground resets the device. |
| 9, 10, 11, 14, 15, 24, 25 | GPIO Pins | GPIO | 7 general-purpose I/O pins |
| 9, 10, 11, 14, 15, 24, 25 | NeoPixel Output | GPIO | 7 pins for NeoPixel output |
| 16 / AD0 | ADDR0 | GND | Connect to ground to increment the I2C address by 1. |
| 17 / AD1 | ADDR1 | GND | Connect to ground to increment the I2C address by 2. |
| 2 - ADC Pin | ADC Input 0 | ADC | Can be configured as an ADC input |
| 3 - ADC Pin | ADC Input 1 | ADC | Can be configured as an ADC input |
| 4 - ADC Pin | ADC Input 2 | ADC | Can be configured as an ADC input |
| 5 - PWM Pin | PWM Output 0 | PWM | Can be configured as a PWM output |
| 6 - PWM Pin | PWM Output 1 | PWM | Can be configured as a PWM output |
| 7 - PWM Pin | PWM Output 2 | PWM | Can be configured as a PWM output |
| 8 / IRQ | Interrupt Input | GND | Pulled low by the seesaw to signal an interrupt. |
| SWD - SWC - RST | Programming Pins | GND | For programming over SWD |
Interactive pinout
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ATSAMD09
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