Panasonic Intellectual Property Management Co., Ltd.

Hisataka Nakabayashi

Kenji Arakawa

Masanori Ito

Shinichiro Miyamoto

Miho Takeda

Kazuyuki Kuboh

An electronic device according to the present technique includes a non-volatile memory in which a program is stored, a volatile memory in which the program read from the non-volatile memory is stored, a controller part for controlling operations of the non-volatile memory and the volatile memory, and a power supply controller for controlling power to the controller part and the volatile memory. The controller part includes a power supply part and a signal fixing part. The power supply part is separated from another power supply line, and power for an interface signal of the volatile memory is supplied from the power supply part thereto. A voltage is supplied from the power supply part to the signal fixing part, and the signal fixing part fixes an output logic of the signal supplied to the volatile memory according to the signal from the power supply controller.

Electronic device with a power supply circuit for controlling the operations of a non-volatile memory and a volatile memory therein

A controller section outputs a first signal and a second signal holding a phase relationship with the first signal. The second signal is received by a memory I/F section via a FIFO memory of an error detecting section. The memory I/F section performs timing adjustment for the first and second signals, outputs the first and second signals after the timing adjustment to a memory, and loops back the second signal. A data comparator compares the looped-back second signal with the original second signal outputted from the FIFO memory and corresponding to the looped-back signal.

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Hyogo, Japan

Hisataka Nakabayashi