Bit-rate calculate method for LPI2C module of i.MX8Q

[tao_li]

Could you please provide the method for calculating the CLKLO and CLKHI if I want to set the LPI2C module of i.MX8 processor working on a specific bit-rate. The reference manual is not very clear, and it is not a directly method.

[tao_li]

Hi  support team,

      I am sorry I did not find the timing configurations information in the table 12-11, Are they Tables from 12-15 to 12-18? I have got some configuration information from these tables, however i still do not know how to get the configuration value for each register directly, so I need an algorithm which can get the configurations for MCFGR2, MCCR0 and MCCR1 directly and quickly.

For example:

     If the frequency of the functional clock is 24MHz, we need the bit-rate is 400kHz,  we can calculate the prescale value as 24MHz divide by 400KHz and so on.

[igorpadykov]

you are right, there is no direct method, as it depends on many factors,

one can also check sect.11.3.2.2.4 Timing Parameters and description of

MCCR0,1 registers.

Best regards
igor

[tao_li]

Hi,

I find that we used different document, I still can not find the sect.11.3.2.2.4. could you please send me your document?

Best Regards

Tao Li(Wood) | WIND RIVER

Office: +86.28.6531.8018 Cell: +86.180.8090.9620

14F, Building 7, Zone D, Tianfu Software Park, High-Tech Zone, Chengdu, P.R.China

[igorpadykov]

please apply to nxp local marketing office, this part is preproduction

part and its documentation is not available for customers.

Best regards
igor

[igorpadykov]

Hi Tao

one can refer to Table 12-11. LPI2C Example Timing Configurations

i.MX 8QuadMax Applications Processor Reference Manual, Rev. E.

Best regards
igor
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