信函分拣是邮政业务内部处理的重要环节.随着我国经济振兴和对外开放,邮政业务量与日俱增,北京、上海等邮局处理的信函量已达70万件左右(包括进口、出口和互寄信函),因此迫切需要以机器自动分拣来代替落后的人工分拣.本文介绍FXZ-1B型全自动信函分拣机入格部分的微机控制系统.这是以TP-801单板机为核心,辅之以硬件驱动电路的控制系统, Mail sorting is an important part of the internal processing of the postal service.With the revitalization of China’s economy and the opening up to the outside world, postal services have been increasing day by day. The number of letters handled by post offices in Beijing and Shanghai has reached 700,000 (including import, export and mail correspondence ), It is urgent to use machine automatic sorting instead of backward manual sorting.This article introduces the microcomputer control system of the automatic part of the FXZ-1B letter sorting machine.This is based on the TP-801 single-board machine as the core, Complemented by the hardware control circuit of the drive circuit,