SLEEP MODE CONTROLLING SYSTEM FOR CPU OF PORTABLE INFORMATION PROCESSOR

摘要

PURPOSE:To provide a portable information processor capable of saving electric power by turning a CPU into a sleep mode just after the finish of key input, and preventing it from getting out of the sleep mode as long as the key input is not executed. CONSTITUTION:This sleep mode controlling system is constituted of a keyboard 1 for inputting data, a storage part 2 to store the inputted data, and a key input detecting part 4 to generate an interruption signal to the CPU 5 and so on.