Fish & Richardson P.C.
Microcontroller capable of being in three modes
To provide a microcontroller that can operate in a low power consumption mode. The microcontroller includes a CPU, a memory, and a peripheral circuit such as a timer circuit. A register of the peripheral circuit is formed at an interface with a bus line. A power gate is provided for control of power supply, and the microcontroller can operate in the low power consumption mode where some circuits alone are active, in addition to in a normal operation mode where all circuits are active. A register with no power supply in the low power consumption mode, such as a register of the CPU, includes a volatile memory and a nonvolatile memory.
Semiconductor Energy Laboratory Co., Ltd.
G G G Y G
G11C G06F G06F Y02D G11C
inventional inventional inventional additional inventional
Hidetomo Kiyoshi Tomoaki Tatsuji
Kobayashi Kato Atsumi Nishijima