8位数码管动态扫描显示实验(显示不用库函数) *显示用指针直接访问GPIO端口的输出寄存器，形式GPIOD->ODR *延时delay_nms(5)时，显示不闪烁 *74HC138 A--P2.2--PE.0 B--P2.3--PE.1 C--P2.4--PE.2 *74HC573 D0~D7---PD[0..7] LE---PE.3 *by 追梦 2011-4-3-8-bit digital dynamic scan showed that the experimen

This feature is available only on the SST39VF800Q. This pin functions as power supply pin for input/output buffers. It should be tied to VDD(2.7-3.6V) in a 3.0V-only system. It should be tied to a 5.0V±10 (4.5-5.5V) power supply in a mixed vo