ONDA SOM/ONDA Hardware/Peripherals/SDIO
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Contents
Peripheral SDIO[edit | edit source]
The two SD/SDIO controller controllers are compatible with the standard SD Host Controller Specification Version 3.0. The controllers communicate with SDIO devices and SD memory cards with data transfers in 1-bit and 4-bit modes.
The SDIO Card Interface supports the maximum data rate in Standard mode (19 MHz), High-speed mode (50 MHz), SDR12 (25 MHz), SDR25 (50 MHz), SDR50 (100 MHz), SDR104 (200 MHz), DDR50 mode (50 MHz).
The following table describes the external ONDA interface signals for the SD card interface (MIO bank 501, pins PS_MIO[46:51] and optional PS_MIO[43], PS_MIO[45]):
| Pin name | Conn. pin | Function | Notes |
|---|---|---|---|
| PS_MIO43_501 | J1.69 | SD/SDIO/MMC VBUS | VBUS (optional) pin |
| PS_MIO45_501 | J1.71 | SD/SDIO/MMC CD | Card detect (optional) pin |
| PS_MIO46_501 | J1.79 | SD/SDIO/MMC data 0 | - |
| PS_MIO47_501 | J1.77 | SD/SDIO/MMC data 1 | - |
| PS_MIO48_501 | J1.75 | SD/SDIO/MMC data 2 | - |
| PS_MIO49_501 | J1.73 | SD/SDIO/MMC data 3 | - |
| PS_MIO50_501 | J1.81 | SD/SDIO/MMC command | - |
| PS_MIO51_501 | J1.85 | SD/SDIO/MMC clock | - |
