Seco SBC-C20 User Manual page 32

μSD card slot
μSD Card Slot
The i.MX8M Family of SoCs embed two Ultra Secured Digital Host controller (uSDHC), able to support
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SD / SDIO / MMC Cards.
Pin Signal
One of them is used for the implementation of the optional onbiard eMMC drive, the other one is used
1 SDIO_DAT2
to manage a
Storage and/or Boot Devices.
2 SDIO_DAT3
The connector is a microSD connector, push-push type, H=2mm, p/n TKS0192003.
3 SDIO_CMD
SDIO_CLK: SD Clock Line (output).
4 +3.3V
SDIO
SDIO_CMD: Command/Response bidirectional line.
5 SDIO_CLK
6 GND
SDIO_DAT[0÷3]: SD Card data bus. SDIO_DAT0 signal is used for all communication modes. SDIO_DAT[1÷3] signals are required
for 4-bit communication mode.
7 SDIO_DAT0
8 SDIO_DAT1
SBC-C20
SBC-C20 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. -Copyright © 2020 SECO S.p.A.
for the use of standard microSD cards, which can be used as Mass
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