FLEXSPI: field FLASHSZ of FLSHA1CR0 - FLSHB2CR0 not define

[AFR89]

Hello,

In the datasheet, the description of FLASHSZ of FLSHA1CR0 - FLSHB2CR0 for the FLEXSPI (IMX8X) define the max size of 0GB. I guess it's a mistake so what is the max size?

Best regards

Alexandre

[Yuri]

@AFR89 
Hello,

   Chapter 18.2.7.1 (AHB Memory Map for Serial Flash memory access) of the RM states,
that "following address range is mapped for AHB read/write access to serial flash memory:
0x0 - 0x10000000". According to Table 2-2 (System memory map), 256MB is reserved
for FlexSPI #0 Memory.

https://www.nxp.com/webapp/Download?colCode=IMX8DQXPRM

Regards,
Yuri.

[AFR89]

Hello,

So you are telling that we can't have devices with a size greater than 256MB connected?

Then why the max value authorize for those register will be 0x400000 (4GB)?

Best regards

Alexandre

[Yuri]

@AFR89 
Hello,

   There are restrictions for AHB (commands, XIP). For the IP commands
address bytes (field) define available memory size.

Regards,
Yuri.