Microcontrollers Improve Power

文章摘要：Figure 8. Implementing an 8051 "Hurry Up and Wait" scheme.SummaryThe 8051 microcontroller family remains one of the most popular processors in the world. Its ease of use and relatively high performance make it ideal for many applications, including portable and handheld products. The intro

Microcontrollers Improve Power,标签：计算机控制技术,工厂电气控制技术,http://www.88dzw.com


Figure 8. Implementing an 8051 "Hurry Up and Wait" scheme.

Summary

The 8051 microcontroller family remains one of the most popular processors in the world. Its ease of use and relatively high performance make it ideal for many applications, including portable and handheld products. The introduction of Maxim high-speed microcontrollers allows a way for existing 8051 designs to improve their power efficiency without a costly redesign.

The benefits of the high-speed microcontrollers that reduce power consumption can be summarized as follows:

• A high performance CPU allows the processor clock to be slowed, resulting in the same level of performance at less power. Alternatively, the performance of an existing system can be increased without increasing power consumption.
  
  
• The high-speed microcontroller incorporates features such as watchdog timers, additional UARTs, and precision reset circuits. External components consume more power.
  
  
• The introduction of two new low-power modes provides a low-power alternative to the Idle mode. In addition to reducing current consumption, power management modes such as those used in the DS87C520 allow the processor to perform tasks such as polling while in a low state. Conventional 8051 architectures require the processor to operate at the maximum clock rate, even if only minimal processing power is required.
  
  
• The benefits of a programmable clock rate and high-performance core can be combined with the Stop mode to greatly reduce power consumption. Examples have been presented that show how energy consumption can be reduced by matching the clock rate of the device to the desired performance level.

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