MICROCOMPUTER AND PORTABLE TELEPHONE SET

摘要

PURPOSE: To reduce the power consumption in the case of power-on reset. CONSTITUTION: When the low power consumption mode designation is discriminated depending on the logic state of an external terminal 11 in the case of power-on reset, a CPU 11 is set to a loop state. Register information of a ROM 17 is transferred to a DMAC 19 under the control of a register information transfer circuit 20, and a peripheral circuit or the like is initialized by DMA transfer based on the register information transferred to the DMAC 19 to reduce the power consumption in the power-on reset.