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MRAM chip and power consumption control method thereof

A power consumption control and chip technology, applied in the direction of data processing power supply, etc., can solve the problem that MRAM chips cannot reduce the standby current more effectively, and achieve the effect of reducing standby power consumption

Inactive Publication Date: 2016-06-01
SHANGHAI CIYU INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The problem to be solved by the present invention is that the existing MRAM chip cannot reduce the standby current more effectively

Method used

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  • MRAM chip and power consumption control method thereof

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Embodiment Construction

[0029] In the prior art, since the existing memory chipsets usually use DRAM or SRAM chips and cannot turn off the power supply during sleep, even when these two chips are replaced by MRAM chips, the system still cannot turn off the MRAM chip to reduce the standby current during sleep. Reduced to a minimum; in addition, the power switch controlled by the operating system software cannot capture every time period that can save power like hardware control.

[0030] Based on the above analysis, the inventor of the present application believes that the MRAM chip must have the ability to respond to the CPU that wakes up from sleep when it is in standby, and cannot completely cut off the power supply. For this reason, the present invention proposes a technical solution for power supply control inside the MRAM chip, thereby further reducing the standby power consumption of the MRAM chip. The most important application of the technical solution of the present invention lies in the fie...

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Abstract

The invention provides an MRAM (Magnetic Random Access Memory) chip and a power consumption control method thereof. The MRAM chip comprises a bus monitoring and power supply control module and a main MRAM module, wherein the bus monitoring and power supply control module is used for monitoring an instruction for using the main MRAM module on a system bus, and controlling the off or on state of a power supply wire used for supplying electricity to the main MRAM module; and the main MRAM module is used for the random access of data related during a CPU (Central Processing Unit) calculation in the program operation process. The power consumption control method of the MRAM chip comprises the following step of if the condition that any instruction for using the main MRAM module from the system bus is not received in a preset time is monitored, cutting off the power supply wire for supplying electricity to the main MRAM. By using the technical scheme, the standby power consumption of the MRAM chip can be reduced.

Description

technical field [0001] The invention relates to the field of semiconductor chips, in particular to an MRAM chip and a power consumption control method thereof. Background technique [0002] Limited by battery power, certain application scenarios, such as the Internet of Things, wearable devices, etc., have high requirements for chip power saving. In these application scenarios, the chip is often in a state of sleeping most of the time and working for a small part of the time, so the requirement for standby current is higher. [0003] The characteristic of semiconductor chips is that even if they are not used, each MOS tube device will have a little leakage. As semiconductor processes have been miniaturized from generation to generation, this leakage has been increasing. The standby current of a chip is basically proportional to the area of ​​the chip that remains powered while asleep. [0004] Currently using random access memory (RAM, RandomAccessMemory) technology, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/32
Inventor 戴瑾
Owner SHANGHAI CIYU INFORMATION TECH CO LTD