Introduction - If you have any usage issues, please Google them yourself
Control SRAM read and write write to the SRAM 12 data, the 12 random data is given by the TA when you press the 4 × 3 keys on the keyboard when the corresponding data read and displayed in the seven-segment LED on SRAM is 16 bits, that is 4 by 16 hexadecimal characters, corresponding to four seven-segment LED