Description of applicaiton note for EIM Flash access

[kazumasasaki]

IMX6SDLRM.pdf contain application note regarding to procedure of EIM flash access at section 22.7.

In following case, I suppose "aah write to base address(CS0) + offset address(555h) by 16bits access".

what does mean "<<1" notation?

22.7.6.2 Spansion Flash Synchronous Mode Configuration

WR16('CS0+('h0555<<1),'h00aa);

Best Regards,

Kazuma Sasaki.

[igorpadykov · Accepted solution]

Hi Kazuma

"<<1" notation means shift left by one position. Flash devices capable of burst operations

do not power up in burst mode. The devices start out in asynchronous
mode, and then must be put into burst mode by programming the configuration register.

Spansion configuration for burst access for example is described on :

http://www.eetasia.com/STATIC/PDF/200806/EEOL_2008JUN26_STOR_EMS_AN_01.pdf?SOURCES=DOWNLOAD

Best regards
igor
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[kazumasasaki]

Hi Igor,

Did you mean that "WR16('CS0+('h0555<<1),'h00aa)" equal to "WR16('CS0+('h0aaa),'h00aa)"?

Is it right?

I checked following document.

https://www.google.co.jp/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwihmrWmlqvTAhUHnZQKHZGZB... 

I think that we should shift left by one position such as application note when we access to the flash device by byte accessing case. If my understanding is not correct, could you elaborate more detail?

Best Regards,

Kazuma Sasaki.

[igorpadykov]

Hi Kazuma

init sequence is defined by nor flash specs, suggest to contact vendor

support for this specific nor flash  for more details about nor initialization sequence.

Best regards
igor

[kazumasasaki]

Hi Igor,

Okay, I appreciate your support.

Best Regards,

Kazuma Sasaki.