lpcware

LPC4337 and eMMC

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by JMRouxel on Fri Apr 24 07:29:17 MST 2015
Hello,

I'm working on a new design based on the Cortex-M4 LPC4337 (NXP)
On my board, there is a e-MMC Memory (MTFC4GMDEA-1M WT) with 8-bit data interface.
My tool is µVision (version 4.74) and I'm using the driver SDIO_LPC43xx.c.
I'm selecting the Memory Card Drive 0 with the SD-Native Bus Mode.

For the moment, the initialization of the eMMC failed : "IO Error. IO/driver initialization failed, or there is no media, or media initialization failed" (driver messages)

I ckecked everything I could. The HW seems to be correct.

Here is the results of the list of commands sended to the eMMC by the driver :
  - Cmd:8 Argument:0x1aa -> timeout
  - Cmd:55 Argument:0x0 -> timeout (repeated many times)
  - Cmd:1 Argument:0xFF8000 -> command done. Answer = 0xFF8080 (repeated many times)

I also tried with the lpcopen version 2.12 without success.

Is someone has an idea to help me ?
Thank you.

Outcomes