What's the voltage level when FlexSPI runs in Hyperbus mode?

[binhu]

Hello! We want to connect the iMXRT1052 with FPGA by Hyperbus using flexspi port. We want the iMXRT to run as the master and FPGA runs as the slave of Hyperbus to exchange the data between them. But first of all we should confirm the working voltage level of the FlexSPI when running under Hyperbus mode.Could you help to confirm? Thank you!

From the EVM board of RT1052 looks like it is running under 1.8V pad mode.But I can not confirm.

[victorjimenez · Accepted solution]

Hello Hu Bin, 

As shown in the below figure, the FlexSPI pins PAD corresponds to GPIO_SD_B0 and GPIO_SD_B1. 

On the datasheet, you can see that for NVCC_SD1 and NVCC_SD2 (which supplies GPIO_SD_B0 and GPIO_SD_B1 pins respectively), you have two operating modes: 3.3V and 1.8V. 

So, the voltage level of the FlexSPI will depend on the mode that you select for NVCC_SD1 and NVCC_SD2, it can be 1.8V (as the evaluation board) or 3.3V. 

Have a great day,

Victor

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

[binhu]

Got it !

Thank you very much!