Circuit design of portable instrument based on XMEGA

Probe domestic double-head probe 038-BB-5.7L The shape of the two ends of the needle is outside the pointed needle

Overview:
This paper designs a high-reliability, low-power, multi-purpose portable instrumentation circuit based on ATMX's new high-performance AVR microcontroller ATXmega128A1, and analyzes its hardware and software.

1. Introduction Industrial instrumentation, due to its collection of information, conversion, storage, transmission, analysis, processing and display, has become one of the foundations and cores of industrial control. With the development of computer technology and microelectronics, industrialization The instrument has gradually developed into an intelligent instrument with a microprocessor system. The portable smart meter is more and more popular in today's life because of its convenient carrying, convenient operation, friendly interface, rich man-machine interface and low power consumption.
The AVR XMEGA is an upgraded version of the 8/16-bit AVR microprocessor. It uses Atmel picoPower technology and all devices can operate at 1.6V. The MCU has 5 霺 wake-up time and 100nA of industry's extremely low power consumption, which is internally increased. Integrated high-speed USB high-speed high-precision analog system. DMA controller and innovative event system maximizes data throughput and real-time performance, and effectively reduces processor load. Its integration is more efficient and reduces efficiency more effectively. Total system power consumption and cost. Particularly suitable for measurement. Industrial, medical and consumer applications of instrumentation equipment.

2. Overall block diagram of the instrument design The overall block diagram of the system is shown in Figure 1. The power supply and reset circuit form the minimum system of the instrument. In terms of multi-purpose instrument, this design incorporates wireless transmission and reception based on Zigbee technology. USB data communication. Flash storage Expansion. Font chip data reading. Data acquisition. Color screen display and other functions. This article will detail the peripheral circuit and its implementation of these six functions.