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Forum Index : Microcontroller and PC projects : External SD card on 100-pin Board DevEBox H7
| Author | Message | ||||
| Glen0 Regular Member  Joined: 12/10/2014 Location: New ZealandPosts: 86 |
How do I connect/configure an external SD card on an H7 100-pin Board DevEBox. I am aware of provision for the on-board SD card and the one on an LCD but I am looking to use one external to these boards. |
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| PhenixRising Guru  Joined: 07/11/2023 Location: United KingdomPosts: 855 |
Not well enough informed on this but can't we specify any old pins for SD? Anyway, just wondering if you already have the attached. Might be useful if designing your own board. STM32H7XX_M_schematics.pdf |
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disco4now Guru Joined: 18/12/2014 Location: AustraliaPosts: 896 |
The SDCARD is connected via the SYSTEM SPI when it's CS is anything other than PIN 79. OPTION SDCARD 79 is a special case and will bitbanged SPI to the onboard SDCARD using the appropriate pins. Any other pin nominated for SD-CS will use the system SPI .i.e same SPI as TOUCH and the SPI LCDs use. So your external SDCARD is wired the same as the one on the LCD panel, just its somewhere else. Latest F4 Latest H7 |
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| Glen0 Regular Member Joined: 12/10/2014 Location: New ZealandPosts: 86 |
Thanks for that. I thought there might be a "Gotcha" but it looks do-able now.Cheers. I intend making a board that will take the 100-pin DevEBox H7 and then most of the pins I usually use will come off on an IDC socket, including the LCD. If anyone is happy to share a Sprint Layout macro for the 100-pin Board DevEBox H7 this will be much appreciated. Saves me creating one. Still learning SL. |
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