FRDM-K64F Pinout

[carlrumsey]

I would just like to inform you that I was working with the FRDM-K64F board, Rev C/Rev E to utilize a Wifi chips capabilities. After much debug it was found that the CE pin, AKA PTC12, must be routed incorrectly. A continuity check was done to find that the CE pin on the board was connected to PTB20, which is also used as a row header elsewhere. The CE pin is shown to be PTC12 in all of the documentation. This is pin 66 on the MCU. Since I was not using PTB20 I changed it in the code and it worked. It was just a pain to debug the issue with the hardware. Just something to keep in mind in the future revisions to fix. Since I found this I am wondering where the missing pin, PTC12, is routed on the board. Thank you

[ve3id]

I wish I had seen this earlier, Carl! I just went
through the same rigamarole and ohmed it out to pin 66 also. So the CE pin of the RF header is not PTC12 but PTB20!
However, when I:
PORTB->PCR[20] = 0x103; (Alt 1, GPIO, +PUP)
GPIOB_PDDR |= (0x01 << 20);
and
GPIOB_PSOR |= 0x100000;
it does not set it to HI, in fact I can see it is not driven at all by seeing noise when I touch the probe with my finger.
Can some engineer that is familiar with the design answer if perhaps I should be using other than alt 1? In the spreadsheet the pin is identified as being the SD card present signal!

[habiburrahman]

I faced a lot of trouble figuring out the problem why my nrf24l01+ was not working. wrote program to blink all the 6 pins individually and, and figured out the CE pin was not working. I wrote the blinky code in mbed but the CE pin failed to output the results i expected. I began doubting the mbed pin definitions, so i wrote the blinky code in keil uvision but pin CE failed to work . I checked for continuity and figured out that pin 64 was not having continuity with CE, but pin 66 (PTB20). I have also noticed no continuity on PINA0. Am i missing any document???

[apanecatl]

You are correct, J6 CE line is connected to PTB20 instead of PTC12 as depicted in the board's documentation, as for PTC12, it is not hooked to any external connector.