Mity CPU Platforms » MitySOM-AM57X

05/12/2025

MW 01:37 PM PCB Development: RE: I/O voltage levels

Hi Shankar,
Take a look at our PCIE / DMA example on our git server:
https://support.criticallink.com/gitweb/?p=mitysom-am57x-ref.git;a=tree;f=fpga/pcie_dma_example;hb=0e1b86410b434ec44afb98d9959deaee252902c0
The project should ... Michael Williamson

BS 12:25 PM PCB Development: RE: I/O voltage levels

Hi Michael,
Thank you for your response.
We are initiating FPGA development on the MitySOM-AM57X development board
using Vivado. We are currently seeking the FPGA pin mapping details for the
PCIe interface to the ARM processor. We ... Bhima Shankar

05/05/2025

MW 12:12 PM PCB Development: RE: I/O voltage levels

The SOM ties the following AM57x voltage IO domains to 1.8V. You will need to use level shifters on your board to get to +3.3V IO interfaces.
VDDSHV1
VDDSHV2
VDDSHV3
VDDSHV4
VDDSHV6
VDDSHV7
VDDSHV9
VDDSHV10
VDDSHV11
VDDSHV... Michael Williamson

BS 12:01 PM PCB Development: RE: I/O voltage levels

Hello Mike,
Thank you for your swift and helpful response.
We are planning to use I2C3, I2C4, and I2C5 interfaces of AM57XX in our design.
Kindly correct us if we are mistaken — as we understand from the documentatio... Bhima Shankar

MW 11:41 AM PCB Development: RE: I/O voltage levels

Hello,
You should use level shifters to shift up to 3.3V. Do not pull the I2C pins directly to 3.3V or modify the SOM.
Our Dev Kit schematic uses TCA9803DGKR, but there are several shifters avialable that should work.
Which I... Michael Williamson

BS 10:59 AM PCB Development: I/O voltage levels

In the data sheet of MITY-SOM_AM57F SOM board page 4, it is mentioned that the AM57XX MFIOs are operating at 1.8V level except mmc1 pins. We have an I2C connections that goes to AM57XX processor, we need the voltage levels of the I2C pin... Bhima Shankar