Hi there,
I thought with all this knowledge in this forum it would make sense to ask here.
I designed my own custom f1c200s board and the issue is that it unreliable when booting. I can read the SPI NOR in FEL without any issue.
U-Boot 2023.04-rc4 (Mar 17 2023 - 21:26:23 +0800) Allwinner Technology
CPU: Allwinner F Series (SUNIV)
Model: Allwinner F1C
DRAM: 64 MiB
Core: 27 devices, 15 uclasses, devicetree: separate
WDT: Not starting watchdog@1c20ca0
MMC: mmc@1c0f000: 0
In: serial
Out: serial
Err: serial
Net: No ethernet found.
Hit any key to stop autoboot: 2The board boots until here, most of the time freezing at „stop autoboot: 2“ not counting down further. Rarely it goes down to zero.
Do you have any idea what could be the reason?
I checked the voltages and they are fine. I also added capacitors close to the f1c200s but that doesn’t change much.
Do you have a hint where to look at? Might it be unstable power? A problem with the crystal habing wrong capacities?
I guess I can rule out a SPI NOR issue by downloading u-boot with SPL directly to DRAM.
Let me know what you think. I can upload my schematics of course.
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In my design I have not connected VRA1 and VRA2. I have seen several designs that didn’t neither. Do they need ghe resistor/capacitor connections?
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