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Observer mxc528169645
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254 次查看
注册日期: ‎06-19-2018

ZYNQ7000系列 所能挂载的SD卡容量问题

百度很多人说ZYNQ 7000使用的是SD2.0规范,所以只能最大支持到32GB。

查看文档ug585-ZYNQ-7000-TRM中有一段说明:

The SD/SDIO controller is compatible with the standard SD Host Controller Specification Version 2.0 Part A2 with SDMA (single operation DMA), ADMA1 (4 KB boundary limited DMA), and ADMA2(ADMA2 allows data of any location and any size to be transferred in a 32-bit system memory -scatter-gather DMA) support. The core also supports up to seven functions in SD1, SD4, but does not support SPI mode. The Zynq-7000 AP SoC is expected to work with eMMC devices because the protocol is the same as SD, but this has not been extensively verified. Users must be careful to meet all timing requirements as they might or might not comply with eMMC. It does support SD high-speed (SDHS) and SD High Capacity (SDHC) card standards. The user should be familiar with the SD2.0/SDIO 2.0 specifications.

确实说明了是SD2.0规范。

那么是否最大SD容量为32GB?

我手上有一块XC7Z035FFG676-2的芯片的开发板,是否SD卡最大容量也为32GB呢?

请大神指点

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Moderator
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注册日期: ‎05-23-2018

回复: ZYNQ7000系列 所能挂载的SD卡容量问题

Hi, @mxc528169645

可以参考一下这个AR: https://www.xilinx.com/support/answers/50991.html

SD卡的容量可以大于32GB。

sd_card_capacity.PNG

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