楼主 # 2022-04-16 20:38:45 分享评论
- jagrutvaghela@vegg.co.in
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allwinner D1-H ,anyone please help me with eMMC schematic connection?
hello,
i am new to this high speed , multicore, risc-V , DDR, eMMC design.
i am working on a project in which i want to use eMMC instead of SD card for booting and as memory, and in reference design of Allwinner D1 there is no eMMC used.
generally i have seen eMMC are 8 bit D0 - D7 and one clk signal, but as per the datasheet and reference manual of Allwinner-D1 it only supports 4bit eMMC5.0. so i am not getting how to use 8 bit emmc with D1.
anyone who is experienced please help me out,
Thanks and Regards,
Jagrutkumar Vaghela
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楼主 #2 2022-04-16 21:37:43 分享评论
- jagrutvaghela@vegg.co.in
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Re: allwinner D1-H ,anyone please help me with eMMC schematic connection?
can you suggest any specific emmc5.0 part? 4 bit, which can work with D1.
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#3 2022-04-16 22:26:20 分享评论
Re: allwinner D1-H ,anyone please help me with eMMC schematic connection?
can you suggest any specific emmc5.0 part? 4 bit, which can work with D1.
市场上销售的eMMC基本都支持的。
比如三星，闪迪那些
dts按默认那个4bit配置就可以了，都不用修改。
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#4 2022-04-18 11:53:16 分享评论
- wupaul2001
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Re: allwinner D1-H ,anyone please help me with eMMC schematic connection?
can you suggest any specific emmc5.0 part? 4 bit, which can work with D1.
emmc bit0~bit3 connect to D1 SD port D0~D3, emmc clk connect to SD port clk, emmc cmd connect to SD port cmd, emmc bit4~bit7 no connect, rst no connect
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楼主 #5 2022-04-22 13:09:41 分享评论
- jagrutvaghela@vegg.co.in
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Re: allwinner D1-H ,anyone please help me with eMMC schematic connection?
D1 支持 eMMC的 4bit/1bit 模式，像 4bit/1bit TF卡一样的使用。
so you mean i can use emmc part with the connection of TF-Card pins, instead of TF card there will be eMMC?
or there is mentioned in datasheet and reference manual the SDC-2 port pins which i think is eMMC pins port, so this one last question which pins of D1 i can use to connect eMMC? as per you TF Card pins (PF0 to PF6), or as per datasheet or reference manual (PC2 to PC7 - SPI0)?
also a 16MB flash i can use for boot loader at spi1?
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#6 2022-04-22 14:49:13 分享评论
- cube
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Re: allwinner D1-H ,anyone please help me with eMMC schematic connection?
@jagrutvaghela@vegg.co.in
按全志的惯例，SDC0和SDC2都可以引导系统，不过我还没看Datasheet。
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