S32K312 - ADC External Channel Name, ID

[ssean]

Hello.

My ADC input connect to PTB10. (S32K312, 100 pin mcu)

PTB10 is ADC0_X[2].

X2 channel number using 80 ~ 87.

How can I choice correct channel number?

Which channel number match PTB10?

[Robin_Shen]

Hi 

You can find the information in Table 314. ADC channel mapping of S32K3xx MCU Family - Reference Manual (Rev 7)

Best Regards,
Robin
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[ssean]

Dear @Robin_Shen 

Thank you for reply.

I already read RM.

But I can't understand ADC0_MA[2:0] means.

Could you explain what is below line means?

"ADC0_MA[2:0] = 3'h0"

"ADC0_MA[2:0] = 3'h1"

Best Regards,

Sean Sung

[Robin_Shen · Accepted solution]

Please refer to the discussion in S32K3 ADC Use of external channels.

But if you did not use external analog multiplexers at all. You can use ADC0_X[0], ADC0_X[1], ADC0_X[2], ADC0_[3] channels as 4 ADC channels instead of 32 external channels. Which means you can ignore ADC0_MA[2:0] signals coming out from S32K3.

[ssean]

Dear @Robin_Shen 

I didn't use external analog multiplexers.

As your mention, I can use ADC0_X[2] channels as just 1 ADC channels.

And I can choice any value between "X2_ChanNum80" ~ "X2_ChanNum87" in "Channel Name", right?

[Robin_Shen]

I think so, you can test it too.

[ssean]

Thank you @Robin_Shen .