Storage apparatus

A storage apparatus comprising:

• a first inverter;
• a second inverter;
• a first storage element having a resistance value in a first state which is set to be a first value and a resistance value in a second state which is set to be a second value that is greater than the first value;
• and
• a second storage element having a resistance value in a third state which is set to be a third value and a resistance value in a fourth state which is set to be a fourth value that is greater than the third value,
• wherein an output terminal of the first inverter is connected to an input terminal of the second inverter,
• wherein an output terminal of the second inverter is connected to an input terminal of the first inverter,
• wherein a first end of the first storage element is connected to the output terminal of the first inverter,
• wherein a second end of the first storage element is connected to a first end of the second storage element,
• wherein a second end of the second storage element is connected to the output terminal of the second inverter,
• wherein the first storage element is brought into the first state when a current flows from the first end of the first storage element to the second end of the first storage element and is brought into the second state when the current flows from the second end of the first storage element to the first end of the first storage element,
• wherein the second storage element is brought into the fourth state when a current flows from the first end of the second storage element to the second end of the second storage element and is brought into the third state when the current flows from the second end of the second storage element to the first end of the second storage element, and
• wherein the second end of the first storage element and the output terminal of the first inverter are short-circuited.