Before revision: (For the following section, CE stands for "Chip Enable" and is used as a way to enable one specific chip) Commands The chip has supports 3 basic commands, based on two input pins called 'M0' and 'M1': load address: this sets up the data bus .
After revision: (For the following section, CE stands for "Chip Enable" and is used as a way to enable one specific chip) Commands The chip has supports 3 basic commands, based on two input pins called 'M0' and 'M1': load address: this command parallel-loads 4 bits from the data bus .