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在sys_config.fex正确配置uart_debug的前提下, 烧录时, 调试串口报ZQ校准错误:
进一步检查DDR的供电发现:贴片的5819二极管反接了, 没有出发DRC(有可能是器件本身就错的), 导致片上内存LDO供电异常.
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