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Integrated circuit system and integrated circuit

A technology of integrated circuits and control circuits, which is applied in the field of integrated circuit systems and integrated circuits, and can solve problems such as power consumption reduction

Active Publication Date: 2017-09-22
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Despite the improved power generation efficiency, the power consumption of MCUs used in embedded devices needs to be as low as possible to allow embedded devices to operate using the limited power available from energy harvesters

Method used

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  • Integrated circuit system and integrated circuit
  • Integrated circuit system and integrated circuit
  • Integrated circuit system and integrated circuit

Examples

Experimental program
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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0037] figure 1 It is a diagram showing an example of the configuration of an integrated circuit system having a first integrated circuit IC1 and a second integrated circuit IC2. in figure 1 Among them, the first integrated circuit IC1, which is a low-power integrated circuit such as the previously described low-power MCU, has the following I / O ports whose signal input and output modes in the sleep mode are configurable. The first integrated circuit IC1 includes a plurality of first I / O ports 101, 102, 111, and 112. The first integrated circuit IC1 operates in at least any one of an active mode and a sleep mode, wherein the power consumption of the sleep mode is lower than the power consumption of the active mode. The signal input and output modes set for the first I / O port during the active mode remain unchanged in the sleep mode.

[0038] The second integrated circuit IC...

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PUM

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Abstract

The invention discloses an integrated circuit system and an integrated circuit. The integrated circuit system includes a first integrated circuit for which signal modes set to a plurality of first I / O ports in the active mode are maintained in the sleep mode and a second integrated circuit for which a plurality of second I / O ports are placed in a floating state in the sleep mode, wherein the first integrated circuit transmits a first notification signal that indicates an operation mode to the second integrated circuit, wherein the second integrated circuit transmits a second notification signal that indicates an operation mode to the first integrated circuit, and wherein the signal modes of the plurality of first I / O ports and the plurality of second I / O ports are set such as to suppress steady currents persistently flowing between the first I / O ports and the second I / O ports, and to suppress through currents flowing.

Description

Technical field [0001] The disclosure herein relates generally to integrated circuit systems and integrated circuits. Background technique [0002] In recent years, power generation efficiency has been improved for energy harvesting devices that generate electricity from environmental energy, such as solar cells, thermoelectric generators, or vibration generators. An MCU (Micro Control Unit) that can be operated with tiny electric power has also been developed. The MCU and energy harvester can be combined to realize an embedded device that can operate without receiving power from an external source. One of the applications of such embedded devices may be wireless sensor nodes. The realization of wireless sensor nodes that can operate without receiving power allows wireless sensor nodes to be installed in unsafe heights, places where toxic gases exist, places where temperature and humidity are unbearable, etc., without the need to manually replace batteries, So it is very usefu...

Claims

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Application Information

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IPC IPC(8): G06F13/20G06F1/32H04W4/70
CPCG06F1/3253G06F13/20G06F2213/0016H04W4/70H04W52/0274H04W56/001Y02D30/70
Inventor 川上健太郎
Owner FUJITSU LTD