5.10.8 Inter-Integrated Circuit Interface (I2C)
The inter-integrated circuit (I2C) module is a multimaster communication module providing an interface between devices compliant with Philips Semiconductor I2C-bus specification version 2.1 and connected by an I2C-bus™. This module will support any slave or master I2C compatible device.
The I2C has the following features:
- Compliance to the Philips I2C bus specification, v2.1 (The I2C Specification, Philips document number 9398 393 40011)
- Bit/Byte format transfer
- 7-bit and 10-bit device addressing modes
- General call
- START byte
- Multi-master transmitter/ slave receiver mode
- Multi-master receiver/ slave transmitter mode
- Combined master transmit/receive and receive/transmit mode
- Transfer rates of 100 kbps up to 400 kbps (Phillips fast-mode rate)
- Free data format
- Two DMA events (transmit and receive)
- DMA event enable/disable capability
- Module enable/disable capability
- The SDA and SCL are optionally configurable as general purpose I/O
- Slew rate control of the outputs
- Open drain control of the outputs
- Programmable pullup/pulldown capability on the inputs
- Supports Ignore NACK mode
NOTE
This I2C module does not support:
- High-speed (HS) mode
- C-bus compatibility mode
- The combined format in 10-bit address mode (the I2C sends the slave address second byte every time it sends the slave address first byte)