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Observer
Observer
5,245 Views
Registered: ‎07-18-2014

Maximum Dual-Parallel QSPI Flash Size ?

Hi,  what i understand from TRM is that maximum supported SPI flash size is 16 MB. But with dual QSPI mode, it is possible to obtain 32 MB addressing area. My questions :

 

1) Is this 32 MB for both flash chips ? I mean it should be 16 MB + 16 MB right ?

 

2) http://www.xilinx.com/support/answers/50991.html In this link, Zynq supported configuration SPI flash chips are listed. 1024 Mb and 512 Mb Mb SPI flash chips are also included. I guess these are added considering software controlled IO mode.  If i use for example, 32 MB + 32 MB dual parallel mode, does this mean boot code will execute from the lower 32 MB ?

 

Thanks,

 

Makiferol

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Observer
Observer
5,222 Views
Registered: ‎07-18-2014

Anyone ?

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Scholar
Scholar
5,214 Views
Registered: ‎11-09-2013

Hi

 

OZOM REV A is assembled with 2 x 32MByte spansion, and YES to you question:

 

with dual parallel you have XiP linear space of 32MByte, this is the maximum in linear mode

 

beware that the FSBL checks for flash size > 16MB and completly disable linear mode if larger device is used, so small patch is needed to re-enable linera mode if wanted

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