Data Sheet

ISM4343 Specification
DOC-DS-20074-5.3
Inventek Systems
Page 39
10 Additional Information
10.1 Communications Interfaces
10.1.1 I2C Interface Characteristics
1. Guaranteed by design, not tested in production.
2. fPCLK1 must be at least 2 MHz to achieve standard mode I2C frequencies. It must be at least 4MHz to
achieve fast mode I2C frequencies, and a multiple of 10 MHz to reach the 400 kHz maximum I2C fast
mode clock.
3. The device must internally provide a hold time of at least 300ns for the SDA signal in order to bridge
the undefined region of the falling edge of SCL.
4. The maximum data hold time has only to be met if the interface does not stretch the low period of SCL
signal.