Gonzalo Brusco

Important changes to forums and questions

All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.

11 years, 3 months ago.

How many ADC pins does the FRDM-K64F have?

I'm a bit confused about the FRDM-K64F platform. In the microcontroller datasheet (MK64FN1M0VLL12) it says it has 2 ADC. But on the FRDM-K64F mbed page it shows I have 6 AnalogIn pins.

https://mbed.org/platforms/FRDM-K64F/

How this is possible?

Are those 6 pins muxed against those two internal ADC?

I need to adquire 3 analog signals on 3 different pins. Although I don't need them to be adquired simultaneously. I can adquire them sequentially (first one pin, then the second, finally the third...). So, I don't need 3 ADC, I just need to be able to mux the two ADCs against 3 pins...

Is this possible?

Apologise for my english.

1 Answer

Erik -
11 years, 3 months ago.

Yes, as you say they are muxed. This is the complete list:

static const PinMap PinMap_ADC[] = {
    {PTC2,  ADC0_SE4b, 0},
    {PTC8,  ADC1_SE4b, 0},
    {PTC9,  ADC1_SE5b, 0},
    {PTD1,  ADC0_SE5b, 0},
    {PTC10, ADC1_SE6b, 0},
    {PTD5,  ADC0_SE6b, 0},
    {PTC11, ADC1_SE7b, 0},
    {PTD6,  ADC0_SE7b, 0},
    {PTB0 , ADC0_SE8 , 0},
    {PTB1 , ADC0_SE9 , 0},
    {PTB2 , ADC0_SE12, 0},
    {PTB3 , ADC0_SE13, 0},
    {PTC0 , ADC0_SE14, 0},
    {PTB10, ADC1_SE14, 0},
    {PTB11, ADC1_SE15, 0},
    {PTC1 , ADC0_SE15, 0},
    {PTA17, ADC1_SE17, 0},
    //{PTE24, ADC0_SE17, 0}, //I2C pull up
    //{PTE25, ADC0_SE18, 0}, //I2C pull up
    {NC   , NC       , 0}
};

I don't know why the last two are commented, since I would assume that it is only the case for that specific board.

I'll uncomment them ;)

posted by Martin Kojtal 13 Jul 2014

What file is being referenced above?

The PinNames.h and PeripherialNames.h don't seem to have this in it?

posted by Jeffrey Alexander 25 Nov 2015

PeripheralPins.c. Some MCUs have this in the API files (so analogin_api.c), but those who have multiple mcus supported of the same type use PeripheralPins.c

posted by Erik - 26 Nov 2015