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读了《电世界》1993年第5期“提高TP801单板计算机抗干扰能力的措施”一文后,总有些意犹未尽的感觉。从我几年来从事单板机、单片机开发的亲身体会来看,该文提到的那些措施很重要,但还不全面,不能彻底排除各种干扰对TP801单板机的侵害。本文介绍一种较有效的措施,即利用看门狗技术来提高TP801单板机的抗干扰能力。电气原理图如附图所示。从图中可见,看门狗技术是利用硬件复位达到克服死机的目的。但实际应用中,在单板机的复位端RST如只照搬附图,加这样一个复位装置,反而会适得其反,单板机无
After reading “Electric World”, No. 5, 1993, “Measures to Improve the Anti-interference Capability of TP801 Single-Board Computer”, there is always some feeling left to be felt. From my years of experience in the development of single-chip single-chip microcomputer, the article mentioned that those measures are important, but not comprehensive, can not completely rule out the interference of a variety of interference TP801 single-board machine. This article describes a more effective measure to use watchdog technology to improve TP801 single board anti-jamming capability. Electrical schematic diagram as shown in the figure. Can be seen from the figure, watchdog technology is the use of hardware reset to achieve the purpose of overcoming crashes. However, in practical application, if the RST of the single-board reset terminal is only copied with the attached drawings, adding such a reset device would be counter-productive.