These configuration pins serve as the interface for a number of different configuration modes: • JTAG configuration mode• Master Serial/SPI configuration mode (x1, x2, and x4)• Slave Serial configuration mode• Master SelectMAP/BPI configuration mode
u-boot-1.1.6里面默认配置文件里面支持的nor型号是 #if 0 #define CONFIG_AMD_LV400 1 /* uncomment this if you have a LV400 flash */ #endif #define CONFIG_AMD_LV800 1 /* uncomment this if you have a LV800 flash */ 而我们使用的nor flash不是LV400/LV800: 我们使用的芯片是MX29LV160DB,但是uboot
Description Starting with x and repeatedly multiplying by x, we can compute x31 with thirty multiplications: x2 = xxx, x3 = x2xx, x4 = x3xx, ... , x31 = x30xx. The operation of squaring can appreciably shorten the sequence of multipl
Description Starting with x and repeatedly multiplying by x, we can compute x31 with thirty multiplications: x2 = x × x, x3 = x2 × x, x4 = x3 × x, …, x31 = x30 × x. The operation of squaring can be appreciably shorten the sequence of multiplications.
standby 待机 hibernate 休眠(睡眠) power-off 关机 usb端口能给外部设备充电在低压状态(standby,hibernate,power-off),如果系统运行在battery mode,那么只工作在standby状态. 通过bios中cpu的配置core multi-processing disable/enable,只有一颗cpu,也就是一个socket disable this setting enables only one execution core u