LPC MicrocontrollersのトピックRe: SD card with LPC-Link2

SD card with LPC-Link2

hmyoong — Wed, 16 Nov 2016 06:58:35 GMT

Hi:

Has anyone try to interface MicroSD card with LPC-Link2?

All the required pins (SD_CLK, SD_CD, SD_CMD, SD_D[3..0], SD_VOLT[2..0], SD_RST and SD_POW) are brought out from LPC4370 onto TP and Jumper. However, I am not sure if they all have the same trace length.

Please advise. Thanks.

Re: SD card with LPC-Link2

jeremyzhou — Thu, 17 Nov 2016 03:09:00 GMT

Hi HM Yoong,

According to above statement, you'd like to use the LPC4370 to contact with SD card, the LPCOpen has included some demos about SD/MMC interface module and please refer to it for details.

LPCOpen Software for LPC43XX|NXP
Have a great day,
Ping

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Re: SD card with LPC-Link2

hmyoong — Thu, 17 Nov 2016 04:06:10 GMT

Hi Jeremy:

Thanks for the link. SD/MMC demo is not available for LPC-Link 2 (LPC4370) board. However it is available in Hitex LPC4350 board. I believe they share similar LPCOpen code base. However, I do not have Hitex LPC4350 board.

I have LPC4088 Experiment Base Board. I compare user manuals for LPC4370 and LPC4088, they are slightly different have use different registers and number of connection. Is there a documentation to explain the difference between the two?

It seems that MicroSD card only use SD_DAT0, i.e., SPI. So the trace length would not be a big issue to use MicroSD card in LPC-Link2 board. Am I right?

Best regards

Re: SD card with LPC-Link2

jeremyzhou — Thu, 17 Nov 2016 07:10:14 GMT

Hi HM Yoong,

I'm afraid there's no such a documentation as you want.

-----So the trace length would not be a big issue to use MicroSD card in LPC-Link2 board. Am I right?

Yes.
Have a great day,
Ping