Example of a sequence chart

Timing Sequence is to give signals in a certain time sequence.
You can get the data you want or write the data you want to write into the chip;
Here is an example of 62256 reading data:

Give the address first. The shortest time for address persistence is: TRC;
Select another CS slice. The shortest time of slice lagging address can be calculated;
Then play OE (Reading signal); the shortest time of the same lag can also be calculated;
The data line is originally in high-impedance mode;
At this time, data is output after a delay of OE for a period of time until the data is effectively output and maintained for a period of time;
Then OE becomes higher;
Then CS becomes higher;
Then change the address;
At this time, the data remains valid for a period of time; then the data is invalid; then the data is high-impedance;
You can find another 62256, And the other chips are similar;