Display and interface circuit: Peter crystal display with character display module LcDM, due to its internal data registers and status register has, so its interface circuit with direct external bus interface mode. And Pc emblem machine data communications interface circuits: Pc emblem cENTRoNIc machine interface (printer interface) and data communication interfaces-dump. Dump the interface with the communication interface Pc emblem machine parallel interface mode, and achieved through INTEL825 parallel port interface circuit and PA 7 Sapporo 574 circuit. The system supports synchronous communication in the guide hole and asynchronous queries communication.

And Sudoku machine interface circuits such as fine letter: CNC machine tools using parallel communication interface for data communication dump device. Dump the interface with the CNC machine communication interface circuit section PA port, 74Ls06oc door Yu dynamic circuits and optical coupling circuit, consisting INTEL825 guide. The system supports synchronization pilot hole first telegraph communication and asynchronous communication.

Such as instantaneous power-down protection circuit capacity paralysis: the case of data stored in memory sodium NC program files in the AC power is disconnected or the voltage is not normal can be reliably retain data without losing a second data memory using sR people M62256 circuit chip, power-down protection circuit by the monitoring circuit M people x692,3.6v DC float charging turtle dragging Lu Friends of other auxiliary components. 3 rule: system monitoring circuit w people TcHDoG: wATcHDoG circuit That watchdog circuit is a microcomputer application system uses a software and hardware integrated anti-jamming technology, this technology can guarantee strong interference and industrial environment applications The normal work. After the precession vortex flowmeter system used by the US M ^ xIM company launched Pay MA fire lining systems can run circuit bend Shan state monitoring.

System initialization module

The completion of the interface module and system initialization parameter initialization on system power after startup. Including the stack pointer is initialized, the current working register area initialization, interrupt system initialization, initialization INTEL8255 work, LCDM initialization, quasi-bidirectional port initialization parameters and system initialization.