GPMC: action of 'WRDATAONADMUXBUS' parameter on NAND memory??

Nicolas Vassal

Hello OMAP experts,

I connected an NAND memory to CS0 of GPMC.

I noticed that the GPMC_CONFIG6_i.WRDATAONADMUXBUS has an impact on the NAND access whereas, according to TRM description, it should not.

To sumarize, if I leave the bitfield default value (0x3) the NAND accesses are OK ... if I change it, the accesses fail.

Has anyone any information about this behaviour?

Thanks!

Best Regards,

Nicolas V.

over 12 years ago

0 Cvetolin Shulev-XID over 12 years ago

TI__Guru 65405 points

Hi Nicolas,

According description in TRM section 11.1.5.14 NAND Device Basic Programming Model - it is no necessary to change the value of the value of registers during NAND initialization. I recommend you to use the default value 0x3.

Tsvetolin Shulev

0 Nicolas Vassal over 12 years ago in reply to Cvetolin Shulev-XID

Prodigy 180 points

Hi,

I also understood from TRM that modifying this parameter is not necessary for NAND ... but it looks like that modifying it, has an undefined impact on NAND control.

It would have been better if this 'undefined behaviour' was clearly written.

Thanks for your answer.

Regards,

Nicolas.

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GPMC: action of 'WRDATAONADMUXBUS' parameter on NAND memory??