ADC DIFFERENTIAL TO SINGLE ENDED CONVERSION

[cmcc]

On the K10 48 pin microcontroller, pins 7 and 8 are ADC0_DP0 and ADC0_DM0- differential inputs. We are trying to optimize use of single ended inputs. Is there a way to use these pins for single ended inputs? If we set one of these pins to ground, will the other essential become a single ended input? Is there a way to use both of these pins for single ended input?

[Robin_Shen]

Hello Chris,

There are below describtion in K10P48M50SF0RM:

"All DADPx inputs may be used as single-ended inputs if the DIFF bit is low. In certain MCU configurations, some DADMx inputs may also be used as single-ended inputs if the DIFF bit is low. Refer to the Chip Configuration chapter for ADC connections specific to this MCU."

Best Regards,

Robin

[mihaicoca]

Hi Robin,

Primarily, i am beginner in this field, but I  have a question about differential mode, specifically about the configuration of registers. I am using a PK60DN512VMD10 core on TWR-K60D100M and I am working in CW 10.3. I want to process data taken from a linescan camera on ADC0 in differential mode. As it is in the table above, for using ADC0_DP0 and ADC0_DM0 in differential mode i need to set ADC0_SC1A_DIFFERENTIAL and put 0x0 value in ADC0_SC1A_ADCH. As I read so far, i understood that only these two things must be configured  to get data to be processed by the convertor. Physical ADC0_DM0(J4 ,PIN 9) is grounded and ADC0_DP0 (J4, PIN 8) is connected to AOUT signal of the linescan camera. I made this configuration without any result.

I am not sure that i understand the operation of the convertor and that I need help or a example code if possible.

Thanks,

Mihai

[egoodii]

According to table "3.7.1.3.1.1 ADC0 Channel Assignment for 48-Pin Package" in K10P48M50SF0RM, these inputs are individually valid in 'single-ended' mode, as selections 0 and 19.