Selection of PSRAM (APS256XXN-OBR-BG, APS6408L-3OBM-BA) that can be used in my design

[sakshi]

Hello All,

I am developing a design based on STM32N647A0 and have limitation on the number of pins to accommodate 16 data lines. The PSRAM used in STM32N6DK board is APS256XXN-OBR-BG and is based on 16 data lines. So, can i use APS6408L-3OBM-BA, PSRAM that has 8 data lines because of the limitation of number of pins. This will help me to stay with the STM32N647A0 part number? Please suggest on this.

 Also, I understand the data rate may be compromised by using APS6408L-3OBM-BA, but I want your suggestion, if the STM32N647A0 device will be compatible to work with 8 data lines PSRAM.

Please share your valuable suggestions on the concerned issue.

Best Regards,

Sakshi 

 

 

 

[mƎALLEm]

Hello,

8 bit data width is supported by the device.

Please refer to the reference manual RM0486 

But, depending on your application it can impact the application performance. I don't recommend 8-bit mode for graphical purpose for example.

Hope that I answered your question.

[sakshi]

Hello @mƎALLEm,

Thankyou for sharing the solution for the issue.

I will be reading the manual shared as well.

Thanks once again.

Best Regards,

Sakshi