TMS320F280023: Logic voltage level for I2C bus

Varun Rajamanickam

Prodigy 30 points

Part Number: TMS320F280023

We are using TMS320F280023 interfaced with other I2C devices in our application.

I am looking for the I2C bus logic voltage level (Vol, Vih and Vil) for TMS320F280023.

I don't see the above information in datasheet.

Could you please share the above details?

Regards
Varun R

over 2 years ago

0 Manoj Santha Mohan over 2 years ago

TI__Guru 55700 points

Varun,

Varun Rajamanickam said:
I am looking for the I2C bus logic voltage level (Vol, Vih and Vil) for TMS320F280023

I2C bus voltage really depends upon what the user want it to be. It can 5v (or) 3.3v. F280023 natively supports 3.3v voltage range and VIL / VIH / VOL definitions available in Electrical Characteristics table (Pg: 55). If you which to interface F280023 to 5v I2C bus, then you would need a voltage translator.

https://training.ti.com/ti-precision-labs-i2c-translators-overview

https://training.ti.com/ti-precision-labs-i2c-buffers-overview

Why, When, and How to use I2C Buffers (https://www.ti.com/lit/pdf/scpa054)

Regards,

Manoj

0 Varun Rajamanickam over 2 years ago in reply to Manoj Santha Mohan

Prodigy 30 points

Manoj,

Thanks for reply.

As per your reply, irrespective of IO protocol we use based on Pin Multiplexing of F280023, for all VIL / VIH / VOL / VOH definitions we should refer 7.6 Electrical Characteristics table - "Digital and Analog IO".

Could you please confirm whether my understanding as above is correct?

Regards

Varun R

+1 Manoj Santha Mohan over 2 years ago in reply to Varun Rajamanickam

TI__Guru 55700 points

Yes, thats correct!

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TMS320F280023: Logic voltage level for I2C bus