Device
The I2C class represents an I²C two-wire serial port. Objects representing a given imp’s specific I²C ports are automatically instantiated at start-up and are accessed through the following object properties of the hardware object:
| imp | I²C 1 | I²C 2 | I²C 3 | I²C 4 |
|---|---|---|---|---|
| imp001 | hardware.i2c12 | hardware.i2c89 | ||
| imp002 | hardware.i2c12 | hardware.i2c89 | ||
| imp003 (Murata part number LBWA1ZV1CD) | hardware.i2cAB | hardware.i2cFG | ||
| imp004m (Murata part number LBEE5ZZ1MD) | hardware.i2cNM | hardware.i2cQP | ||
| imp005 (Murata part number LBWA1UZ1GC-901) | hardware.i2cJK | hardware.i2c0 | ||
| imp006 | hardware.i2cJK | hardware.i2cLM | hardware.i2cTU | |
| impC001 | hardware.i2cJH | hardware.i2cKL | hardware.i2cXBA | hardware.i2cXDC |
The imp005’s second I²C bus is accessed via dedicated pins rather than GPIO, hence the slightly different nomenclature.
When implementing I²C using an imp, please note that external pull-ups are required. It is not possible to enable the internal pull-ups when pins are used for I²C.
These peripherals do not support clock-stretching, so any I²C peripheral which must delay before replying to communications from the host will not work with the imp005.
The I2C object has the following member methods: