Hai All
RX-231 ADC resolution, there is warnig on E2-studio, if use 12 bit resolution for ADC, Port 4.should not to be use.
What is the effect if use port 4 while we use ADC 12bit resolution ?
regard,
rachmat
Hi Rachmat, thank you for posting to the Renesas community. Unfortunately, it's a hardware constraint in the RX231. As reference manual claims that the port4 power supply is connected internally to the ADC power supply. so it's recommended not to set any pins of the port4 as output while using ADC, otherwise it might interfere with ADC accuracy. However, I think it might not be a problem if you're not toggling port 4 pins very fast or have no high-current sinker connected to the port (but it's not recommended). I hope you find it useful. Best regards,
Hossein.
If this or any other user's response answers your concern, kindly verify the answer. Thank you!
Renesas Engineering Community Moderatorhttps://community.renesas.com/https://academy.renesas.com/en-support.renesas.com/.../
Hi Hossein
Thank you for the answer
Anyway RX231 ADC can be set to 10bit resolution right ?
How to set to 10bit resolution ?
The term "12-bit A/D Converter" that is noted in the smart configurator, doesn't focus on the resolution of ADC, the ADC unit is named "12-bit A/D Converter (S12ADE)" so that it refers to its name.
Although there's no way to change the ADC resolution and it's fixed to 12-bit, that warning about the ADC and Port4 has nothing to do with ADC resolution as it is about the ADC unit in general.
regards,