Hello, I´m using the ADC 10 Bit of S08DZ60 to convert a v...

[a_serbouti1]

Hello,

I´m using the ADC 10 Bit of S08DZ60 to convert a voltage in the intervall from 0,5 to 4,5V.

In the Watch window I get maximally 910 and not the supposed 1024.

in this uC the Vrefh ist connected to Vddad und Vrefl to VSSad so that I can´t use any

voltage divider.

My question is how to get it with software?

I have read the datasheet but still can´t get it!

I´ll be merciful for any help or advices.

regards!

[Denn]

Hello,

Try putting this question in 8 bit controller section.

---

ADC VrefH & VrefL wrote:

I´m using the ADC 10 Bit of S08DZ60 to convert a voltage in the intervall from 0,5 to 4,5V.

In the Watch window I get maximally 910 and not the supposed 1024.

in this uC the Vrefh ist connected to Vddad und Vrefl to VSSad so that I can´t use any

voltage divider.

My question is how to get it with software?

---

You'll get 1024 when your voltage applied is equal to VDDAD !!! Reason is that VREFH ist connected to VDDAD as you said.

Calculations are as follows

Assumption I make is your VDDAD is 5V(please check this at your end)

ADC Counts you get=  Applied Voltage * 1024 /  VDDAD = 4.5*1024/5 =921.6. So I feel the value you get is fine.

Regards

Denn