TMS320F28035: i2c Clock for slave

sagar shah54

Expert 2125 points

Part Number: TMS320F28035

Do I need to Set the clock registers and I2CPSC for I2C configured as Slave Device? Can I put it to 0?

Thanks,

over 6 years ago

0 Kevin Allen18 over 6 years ago

TI__Mastermind 45426 points

Hi Sagar,

Yes, you will still need to configure I2CPSC when configured as a slave. The register functions to divide down SYSCLK to produce the I2C module clock, which is needed for the I2C peripheral to function. It's not only used to generate the clock at the SCL pin, shown below. ICCL and ICCH can be ignored when configured as a slave I believe.

Please note, "To meet all of the I2C protocol timing specifications, the I2C module clock must be between 7 - 12 MHz."

Best,

Kevin

0 sagar shah54 over 6 years ago in reply to Kevin Allen18

Expert 2125 points

So Should i2c clock module be the same for both master and slave? Since one of them is at 200 MHz and the other is at 60MHz. Currently, mine i2cpsc for 200Mhz is 18.

0 Kevin Allen18 over 6 years ago in reply to sagar shah54

TI__Mastermind 45426 points

Hi Sagar,

No, they don't have to be the same. They just needs to meet the "7-12 MHz" requirement for the I2C module to work properly.

Best,

Kevin

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TMS320F28035: i2c Clock for slave