Whether the CX3 can interface to SD card vai SPI Bus?

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IlHa_3972631
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Whether the CX3 can interface to SD card vai SPI Bus?

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YiZ_31
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Hi IIan,

Please refer to the following answer:

1. CX3 uses a standard SPI interface, so the connection would be as normal.

2. In FX3S, SD/MMC controller can support SDXC. It has two ports that can support SD card up to 2 TB size.

3. The maximum operation frequency of SPI interface is 33 MHz.

4. You can download the driver contained in FX3 SDK:

http://www.cypress.com/documentation/software-and-drivers/ez-usb-fx3-software-development-kit

Regards,

Eddie

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YiZ_31
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Hi,

CX3 supports an SPI master interface on serial peripherals port. It can interface to SD card via SPI bus.

Regards,

Eddie

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Hi,

1. Can you please share the Hardware connection between CX3 and SPI?

2. What's the SD maximum capacity that can used?

3. What's the performance of read and write?

4. Can you share the SW driver?

thanks

Ilan

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YiZ_31
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Moderator
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1000 replies posted 750 replies posted 500 replies posted

Hi IIan,

Please refer to the following answer:

1. CX3 uses a standard SPI interface, so the connection would be as normal.

2. In FX3S, SD/MMC controller can support SDXC. It has two ports that can support SD card up to 2 TB size.

3. The maximum operation frequency of SPI interface is 33 MHz.

4. You can download the driver contained in FX3 SDK:

http://www.cypress.com/documentation/software-and-drivers/ez-usb-fx3-software-development-kit

Regards,

Eddie

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YiZ_31
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1000 replies posted 750 replies posted 500 replies posted

Hi IIan,

To clarify, FX3S, SD/MMC controller can support SDXC. However, CX3 do not have such hardware, so it can not directly interface to SD card. The SPI hardware can't handle the SD/MMC protocol. You may need to add MMC/SD driver in your firmware.

Regards,

Eddie

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