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  1. Hi, I have a question about maximum memory support on Allwinner processors, inc. A20 and A64. In datasheet I see: A20:"Support 2GB address space" A64:"up to 3GB address space" Does these mean the maximum installable memory on them? on the other hand, in official page, written that A64 has 1GB memory support! it is confusing. Thank you
  2. it is solved. it has been discussed here that this is due to power source problem.
  3. Hello, I have a design with old but cheap Allwinner A20 processor. At the boot time, u-boot keeps rebooting just after reaching the below line (just after DRAM: 1GiB): U-Boot SPL 2019.07 (Oct 13 2020 - 17:36:08 +0300) DRAM: 1024 MiB CPU: 912000000Hz, AXI/AHB/APB: 3/2/2 Trying to boot from MMC1 U-Boot 2019.07 (Oct 13 2020 - 17:36:08 +0300) Allwinner Technology CPU: Allwinner A20 (SUN7I) Model: Olimex A20-OLinuXino-LIME2-eMMC I2C: ready DRAM: 1 GiB I even tried ready images from internet, alghtough some did not reboot countinlusly, but the