Description: LCD 1602 response speed relative to it is partial of single chip speed slow.
Give a simple example, put a barrels of oil to a bottle through a funnel, pour oil poured the speed of flow must maintain, namely, in certain limits, fall so fast oil spill from funnel top, thus wasting away. We can judge and through the eyes in the top surface oil noodles keep under the rated flow to funnel to pour oil, such efficiency is the highest.
And for single-chip microcomputer, it is like that bottle funnel 1602 show, write 1602 data like oil, if the high speed on single to write the data may be 1602 caused by the spill, such as said above, the results only for writing ABC showed a, this is because the display chip 1602 every time you want to take the time to deal with the input ASCII data, and it is displayed. But we are not easy to write data to voluntarily control the speed, so 1602 use busy signal is necessary, each only detect busy signal microcontroller is zero, that is not favour, just to s
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