I2C features

The CAT4 I2C is a master-only driver supporting the following features:

• Frequencies - low speed (10 kHz), standard speed (100 kHz), and high speed (400 kHz)
• 7-bit address

The following features are not available on these devices:

• Interrupts and events
• Non-blocking communication
• FIFO control
• Trigger connections

The I2C hardware is always clocked using the HT clock. NULL should be passed in the initialization function for the clk parameter.