SD or MicroSD memory card

Aria G25 can boot directly from an SD memory card.

This is a simple wiring scheme to do that.

For a real project please follow this guide line:

How to design the microSD circuitry

Up to two SD card can be wired following this pinout:

Primary SD (mmc0)	Secondary SD (mmc1)	SD card pins
S1 (3V3)	S1 (3V3)	4 (VDD)
S3 (DA3 MMC0)	S19 (DA3 MMC1)	1 (DAT3)
S4 (DA2 MMC0)	S20 (DA2 MMC1)	9 (DAT2)
S5 (DA1 MMC0)	S21 (DA1 MMC1)	8 (DAT1)
S6 (CK MMC0)	S10 (CK MMC1)	5 (CLK)
S7 (CDA MMC0)	S11 (CDA MMC1)	2 (CMD)
S8 (DA0 MMC0)	S12 (DA0 MMC1)	7 (DAT0)
S24 (GND)	S24 (GND)	3 (VSS1) and 6 (VSS2)

This is the device tree definition to use:

mmc0: mmc@f0008000 {
    pinctrl-0 = <
        &pinctrl_mmc0_slot0_clk_cmd_dat0
        &pinctrl_mmc0_slot0_dat1_3>;
    status = "okay";
    slot@0 {
        reg = <0>;
        bus-width = <4>;
    };
};

mmc1: mmc@f000c000 {
    pinctrl-0 = <
        &pinctrl_mmc1_slot0_clk_cmd_dat0
        &pinctrl_mmc1_slot0_dat1_3>;
    status = "okay";
    slot@0 {
        reg = <0>;
        bus-width = <4>;
    };
};

MicroSD memory card

Aria G25 can boot directly from a uSD memory card. Up to two uSD card slots can be wired.

To create a bootable memory card follow this article
To buy a ready to use memory card see our eShop.

Lines used:

Primary uSD (mmc0)	Secondary uSD (mmc1)	uSD card pins
S1 (3V3)	S1 (3V3)	4 (VDD)
S3 (DA3)	S19 (DA3)	2 (DAT3)
S4 (DA2)	S20 (DA2)	1 (DAT2)
S5 (DA1)	S21 (DA1)	8 (DAT1)
S6 (CK)	S10 (CK)	5 (CLK)
S7 (CDA)	S11 (CDA)	3 (CMD)
S8 (DA0)	S12 (DA0)	7 (DAT0)
S24 (GND)	S24 (GND)	6 (VSS)

This is the device tree definition to use:

mmc0: mmc@f0008000 {
    pinctrl-0 = <
        &pinctrl_mmc0_slot0_clk_cmd_dat0
        &pinctrl_mmc0_slot0_dat1_3>;
    status = "okay";
    slot@0 {
        reg = <0>;
        bus-width = <4>;
    };
};

mmc1: mmc@f000c000 {
    pinctrl-0 = <
        &pinctrl_mmc1_slot0_clk_cmd_dat0
        &pinctrl_mmc1_slot0_dat1_3>;
    status = "okay";
    slot@0 {
        reg = <0>;
        bus-width = <4>;
    };
};