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Method and microprocessor for reducing static and dynamic power consumption of multi-pin microcontroller

A technology of microcontrollers and microprocessors, applied in the program control, electrical program control and other directions in the sequence/logic controller, to achieve the effects of reducing static and dynamic power consumption, changing service life, and long service life

Active Publication Date: 2012-09-19
SHANGHAI HUAHONG INTEGRATED CIRCUIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is a very big challenge to achieve ultra-low static low power consumption without turning off the power supply of the user program storage area, and to ensure a wake-up time of several microseconds.

Method used

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  • Method and microprocessor for reducing static and dynamic power consumption of multi-pin microcontroller
  • Method and microprocessor for reducing static and dynamic power consumption of multi-pin microcontroller
  • Method and microprocessor for reducing static and dynamic power consumption of multi-pin microcontroller

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Embodiment Construction

[0018] The invention utilizes the ultra-low static and dynamic power consumption characteristics of the SRAM relative to the embedded non-volatile memory to realize the ultra-low power consumption performance of the microcontroller powered by the battery.

[0019] The microcontroller is powered by the battery, not directly by the grid, and has very strict requirements on the static and dynamic power consumption index. The microcontroller has 64, or 80, or 100, or even higher pin counts, so the microcontroller's die form factor is determined by the pinout, not by the microcontroller's The core (Core) circuit area is determined.

[0020] see figure 1 As shown, an embedded nonvolatile memory (such as Flash) is provided as a user program storage area on the microcontroller chip; the power supply of the embedded nonvolatile memory can be cut off and turned on independently.

[0021] A static read-only memory (SRAM) is embedded on the microcontroller chip, and its storage capacity...

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Abstract

The invention discloses a method for reducing the static and dynamic power consumption of a multi-pin microcontroller. The microcontroller is powered by a battery, a static read-only memory which is equal to the storage capacity of an embedded-type nonvolatile memory for storing a user program is embedded inside a chip of the microcontroller, after the microcontroller is electrified, a user program code of the embedded-type nonvolatile memory is imaged onto the static read-only memory through a direct memory access module, then the power of the embedded-type nonvolatile memory is turned off, a program pointer pointing towards original embedded-type nonvolatile memory is mapped onto the imaged static read-only memory, and the user program is executed on the static read-only memory. The invention also discloses a microprocessor for realizing the method. Due to the adoption of the method and the microprocessor, the static and dynamic power consumption of the microcontroller which is powered by the battery can be effectively reduced, and the service life of the battery can be prolonged.

Description

technical field [0001] The invention relates to the field of microcontrollers, in particular to a method capable of reducing static and dynamic power consumption of a multi-pin microcontroller powered by a battery. The invention also relates to a microprocessor implementing said method. Background technique [0002] At present, microcontroller chips are widely used in many handheld devices and meter fields. Since these devices are powered by batteries, the market has high requirements for chips in this type of field in terms of power consumption, especially For the main control chip in the system, such as a microcontroller. [0003] To extend battery life, microcontrollers are required to have ultra-low power quiescent and dynamic currents. In the static mode, almost all the circuits on the microcontroller chip will stop working, enter the standby or power-off mode, and only a small number of circuits are in the working state, such as real-time calendar, watchdog, LCD scre...

Claims

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Application Information

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IPC IPC(8): G05B19/04
Inventor 景蔚亮
Owner SHANGHAI HUAHONG INTEGRATED CIRCUIT