single-pulse oscillation

PLL under the action of a single particle in Space radiation environment, will result in frequency or phase deviation, or even result in suspension of oscillation, which may lead to the interruption of communication or function, thereby spacecraft catastrophic consequences follows.

空间辐射环境中的PLL在单粒子作用下，将产生频率或相位偏差，甚至导致振荡中止，造成通信或功能中断，从而对航天器造成灾难性的后果。

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It is introduced simply in this paper the characteristic of the smart 8-lead PIC 12C508/ 509 single chip microcomputer, and discussed especially the choice of the oscillation mode in the real time circuit.

对小巧的8脚单片机PIC12C508／509的性能特点作了简要介绍。

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