Using eMMC (KLMAG4EEHM) to replace NAND (K9F1208U0C) on i.MX28 design

[vincentchou]

Hi! Friends,

Has anyone know whether we could use eMMC (KLMAG4EEHM) to replace NAND (K9F1208U0C) on an i.MX28 platform modified from i.MX28 Home Energy Geteway?  We would like to use eMMC to make it more stable and use the same NAND interface to save SD slots.  If this can be done, what do we need to change on our BSP to accommodate the difference between eMMC and NAND flash?  Any assistance is appreciated!

Vincent

[vincentchou]

No need to fix this because it can not be fixed.  We just redesign our board instead.

[weidong_sun · Accepted solution]

Hello,Vincent,

      Let me refer to i.mx28EVK schematic and tell you how to connect eMMC iNAND Flash(KLMAG4EEHM). On this schematic , you can find SD/eMMC card socket on page 8 :

SSP port at CPU side:

You can replace this SD/eMMC socket with you iNAND Flash(KLMAG4EEHM). There are no WP and CD pins on iNAND Flash. So don't use SSP0_DETECT and SSPO_WP signals . There is a reset pin on iNAND Flash, You can pull it up to 3.3V via a 10k-resistor and connect it a 1uF capacitor to GND.

Regards,

Weidong

[vincentchou]

Hi!  Weidong,

Sorry I forgot to say thanks to you about this before.  Thanks for your help!  We have already changed our schematic accordingly!

Vincentt