About BUS_FREE and LEADIN_COUNT field in HW_I2C_TIMING2 of i.MX28

[yuuki]

Dear all,

I am referring to the following.
MCIMX28RM.pdf (Rev2):
- 27.5.4 I2C Timing Register 2 (HW_I2C_TIMING2)(P.1895)

I cannot understand BUS_FREE and the LEADIN_COUNT field of HW_I2C_TIMING2 well.
What kind of influence do these fields have on I2C waveform?

May I have advice?

Best Regards,

[Yuri · Accepted solution]

  As for the BUS_FREE bit field, please refer to IC9 (bus free time between a STOP
and START condition) timing parameter in i.MX28 Datasheet (Hardware Specs).
 

  LEADIN_COUNT relates to IC2 parameter.

Also, please take a look at Table 2-18 (I2C Timing Parameters) of the i.MX23
Reference Manual.

http://cache.freescale.com/files/dsp/doc/ref_manual/IMX23RM.pdf

Have a great day,
Yuri

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