topic Digging into SD host controller on MK20DN512VLQ10 in Kinetis Microcontrollers

Digging into SD host controller on MK20DN512VLQ10

garylynch — Thu, 13 Feb 2020 14:42:11 GMT

I am doing maintenance on a product based on the MK20DN512VLQ10 and am having trouble understanding the data sent to the peripheral registers of its SD host controller. I contacted the help desk yesterday, asking for the reference manual. Downloaded suggested document from:
- https://www.nxp.com/docs/en/data-sheet/K20P144M100SF2V2.pdf

When I search it for SDHC, I find a chapter with some timing diagrams and a table of the pins where the signals emerge. No mention of peripheral registers whatsoever.

I have previously used reference manuals for K60, K10, and K70 processors and they all contained full disclosure for all peripherals. Why can't I find it here?

Advanced thanks for your suggestions.

Re: Digging into SD host controller on MK20DN512VLQ10

mjbcswitzerland — Thu, 13 Feb 2020 16:28:29 GMT

Hi Gary

You have a link to the data sheet and not the reference manual.

You can get the K20 100MHz parts' reference manuals at

Arm Cortex-M4|Kinetis K20 100 MHz 32-bit USB MCUs | NXP

Regards

Mark
[uTasker project developer for Kinetis and i.MX RT]

Re: Digging into SD host controller on MK20DN512VLQ10

garylynch — Thu, 13 Feb 2020 16:55:31 GMT

Thanks, Mark. Your feedback is spot-on, as usual.

So I was correct in asking for the Reference Manual, but should have paid more attention to the first page as the data sheet is so similar.