Difference between revisions of "I2C connector pinout"
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! pin !! function !! arduino pin |
! pin !! function !! arduino pin !! Arduino Mega |
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| 1 || GND || GND |
| 1 || GND || GND || GND |
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| 2 || SDA || A4 (Analog input 4) |
| 2 || SDA || A4 (Analog input 4) || Digital 20 |
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| 3 || SCK || A5 (analog input 5) |
| 3 || SCK || A5 (analog input 5) || Digital 21 |
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| 4 || VCC || VCC |
| 4 || VCC || VCC || VCC |
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Revision as of 14:57, 6 April 2012
For the interconnect between I2C masters and the I2C expansion boards BitWizard uses a 4-pin I2C cable.
| pin | function | remark |
|---|---|---|
| 1 | GND | Power Ground |
| 2 | SDA | Serial I2C Data |
| 3 | SCK | Serial I2C Clock |
| 4 | VCC | Power 5V. |
The connector is laid out as follows:
Connecting the bitwizard boards to an Arduino
| pin | function | arduino pin | Arduino Mega |
|---|---|---|---|
| 1 | GND | GND | GND |
| 2 | SDA | A4 (Analog input 4) | Digital 20 |
| 3 | SCK | A5 (analog input 5) | Digital 21 |
| 4 | VCC | VCC | VCC |
You could use other pins, but then you have to make a software I2C implementation. This is not too difficult, but might be neccesary if something else is already on the I2C pins.