TIDUF35 june 2023 AM6442
The processor board provides an micro Secure Digital (µSD) card interface connected to MMC1 port of the AM6442 processor. The µSD card interface supports UHS1 operation including operations at the 3.3-V IO level.
For ESD and surge protection of the µSD card, the TPD4S009 device is used. This is a 4-channel ESD design for high-speed interfaces.
The µSD card enables this reference design to boot a Linux OS from an external attached memory.