# SD or MicroSD memory card

<abstract>
Aria G25 can boot directly from an SD memory card. 
</abstract>

This is a simple wiring scheme to do that. 

<img src="ariag25_sdcard_wiring.jpg">

For a real project please follow this guide line:

* @article='pcb_microsd' 

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) |



<br/>
This is the device tree definition to use:

<pre class="minicom">
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>;
	};
};
</pre>


#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 @article='binary_repository'
* To buy a ready to use memory card see our [eShop](/catalog_sdcard).

<img src="ariag25_microsdcard_wiring.jpg">

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)  |  

<br/>
This is the device tree definition to use:

<pre class="minicom">
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>;
	};
};
</pre>

To create a bootable memory card follow this article:

* @article='download_aria'
 
To buy a ready to use memory buy on our Store:

* <a href="https://www.store.acmesystems.it/microsd" target=_"blank">Ready-to-use microSD catalog</a>


@shop='MSD-HOLDER-1'
@shop='MSD-HOLDER-2'
@shop='MSD-HOLDER-3'