Fiscal Cash Registers For Development Of Micro-printer

This paper expound software and hardware design method and debugging for the special micro printer for fiscal cash register.The special micro printer meet the National Revenue andapply to SiChuan, ShanDong, GuangXi, HeNan and GuiZhou etc..The special micro printer for fiscal cash register adapts 8-bit microcontroller AT89S52 that have ISP function .It makes use of CPLD accomplishing the most of control logic. The system have high integration and reliability.The hardware for micro printer includs four modules: master module,communication module,CPLD module and driving module for micro printer core. Master module controls the whole system.Communication module answers for communicate with fiscal cash register.CPLD module accomplishs decode and latch logic,generate PWM pulse for driving motor chip.The driving circuit for micro printer core drivers the related part(include two step-motor ,print pin and sensor).The special micro printer for fiscal cash register adapts the C language to program which easy to maintain and update.