TCA9555: TCA9555

Andrei Anikin

Prodigy 40 points

Part Number: TCA9555

Hi team!

My question concern with possible manipulations adress pins.

I connect these pins directly to Atmega port and sometimes i change its values to change address tca9555 device.

Is it correct ?

Sincerely yours,

Andrei

email: an7759anan@rtural.ru

over 5 years ago

0 Miguel Robertson over 5 years ago

TI__Guru 62920 points

Hello Andrei,

Yes, it is OK control the address pins of TCA9555 via MCU GPIOs so that their value can be changed dynamically during operation. (The address value is not "latched" by the device, e.g., at start-up.) You can read more about this idea in this application note:

https://www.ti.com/lit/an/scaa137/scaa137.pdf

Please let us know if you have any further comments.

Regards,
Max

0 Andrei Anikin over 5 years ago in reply to Miguel Robertson

Prodigy 40 points

Hello Max,

Thank you very much for your reply!

Regards,
Andrei

Interface

Interface forum

TCA9555: TCA9555