Can anyone confirm if the SDIO_CLK/CMD/D0/D1/D2/D3 (SDMMC3) port supports 3.3V logic like the SDCARD (SDMMC1) port? Some of the documentation indicates it is 1.8V only.
Indicating SDMMC3 is 3.3V/1.8V
TX1 TRM (v1.0p): Chapter 32: Introduction notes that SDMMC1/SDMMC3 are for use with 3.3V/1.8V IO.
TX1 Datasheet (V0.91): Chapter 3: Table 7: Indicates SDIO and SDCARD controllers both support 3.3/1.8V
Indicating SDMMC3 is 1.8V
TX1 Datasheet (V0.91): Chapter 4.5: Table 28: Indicates SDIO port is a CMOS-1.8V. SDCARD is CMOS-3.3V/1.8V
TX1 OEM Product Design Guide (not listed on the download center anymore): Chapter 8: Table 53: SDIO controller is CMOS-1.8V
Any detail that I missed that would prevent an SD card from being used on both SDMMC1 and SDMMC2 at the same time?
Thanks,
Chris