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Data processing system, microcontroller and semiconductor device

A technology of a data processing device and a microcontroller, applied in the direction of electrical digital data processing, digital data processing components, digital memory information, etc., can solve the problems of inability to cut off the power supply and volatile external memory, etc.

Active Publication Date: 2015-04-15
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when SRAM and DRAM are used as the external memory of the microcomputer in the data processing device, since these external memories are volatile, it may not be possible to turn off the power supply.

Method used

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  • Data processing system, microcontroller and semiconductor device
  • Data processing system, microcontroller and semiconductor device
  • Data processing system, microcontroller and semiconductor device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0065] figure 1 It is a figure which exemplifies the structure of the data processing apparatus of Embodiment 1.

[0066] The data processing device 100 shown in the figure constitutes, for example, a sensor system, and performs various calculations based on information detected by a single or a plurality of sensors to generate various data and control various devices. The data processing device 100 is a sensor system that can be operated by power supply using, for example, a battery or energy harvesting technology. Devices (sensors, microcontrollers, wireless ICs, etc.) constituting the system are placed in various places, so it is required to save power as much as possible. Actions to reduce maintenance costs such as battery replacement.

[0067]Specifically, the data processing device 100 is configured to include an external memory (NVRAM_IC) 1, a power supply unit (PW_UNT) 2, a microcontroller (MCU) 3, a sensor unit (SNSR) 4, a wireless IC (RFIC) 5, and other The periphe...

Embodiment approach 2

[0128] In addition to the functions of the data processing device according to Embodiment 1, the data processing device according to Embodiment 2 has a function capable of switching the specification of the memory interface of the MCU between active-high control and active-low control.

[0129] Regarding the data processing device according to the second embodiment, the hardware structure of the external memory 1, the power supply unit 2, the sensor unit 4, and the wireless IC 5 is the same as that of the data processing device 100 according to the first embodiment, and the structure of the memory interface circuit in the MCU is the same as that of the data processing device. 100 different.

[0130] Figure 7 It is a figure which exemplifies the internal structure of MCU6 of Embodiment 2.

[0131] Like the memory interface circuit 32 of the first embodiment, the memory interface circuit 62 in the MCU 6 performs transfer of data to the external memory 1 through the external te...

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Abstract

In order to perform easily power cutoff of a device configuring a data processing system and to improve the power reduction effect at standby, the data processing system is configured with a microcontroller, a memory IC including a nonvolatile RAM array, and a power supply unit capable of controlling the power supply to the microcontroller and the memory IC, separately. When a control signal to control read and write of data to the nonvolatile RAM array is at a high level, the memory IC is enabled read and write of data to the nonvolatile RAM array. When the control signal is at a low level, the memory IC is disenabled read and write of data to the nonvolatile RAM array. The microcontroller sets the control signal at a low level, when the memory IC is shifted to a standby state by the power supply unit.

Description

technical field [0001] The present invention relates to a data processing device, a microcontroller, and a semiconductor device, and particularly relates to an effective technology suitable for a data processing device requiring low power consumption. Background technique [0002] Data processing devices such as portable terminals and servers are configured by interconnecting multiple electronic components such as microcontrollers (microcomputers), memories, sensors, and power supply ICs to realize desired functions. In recent years, there has been an increasing demand for power saving of data processing devices. In order to achieve power saving of the data processing device, it is essential to suppress the power consumption of each device (such as a semiconductor integrated circuit) constituting the data processing device. [0003] As a technique for saving power in semiconductor integrated circuits, a technique called power gating has attracted attention in recent years. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F1/3275G06F1/3243G11C14/0009G06F1/3287Y02D10/00Y02D30/50
Inventor 原口大林勇河合浩行
Owner RENESAS ELECTRONICS CORP