68705R3 microcomputer training module

• Main Authors: Bayudan, Marshall P., Ifurung, Lazaro F., Latorre, Bryan Benedicto S., Santos, Roderick, Techico, Arnell Stephen P.
• Format: text
• Language: English
• Published: Animo Repository 1994
• Subjects: Microcomputers > Programming; Computers > Handbooks, manuals, etc; Integrated circuits; Electronic digital computers > Circuits > Programming; Emulators (Computer programs); Chips (Electronics)
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/8358
• Institution: De La Salle University

The M68705R3 is an 8-bit low-cost single chip micro-Computer. It is an EPROM version of the 6805 Family. The main advantage of this chip is that troubleshooting will be less complicated in terms of the connection with other devices, since the chip has no external connections, like wires. Some of the peripherals needed for the development of the prototype are already available on the chip. This thesis project contains three major components: the personal computer, the interface circuit, and the programmer circuit.Most microprocessor units with EPROM are programmed mainly by an eprom programmer. The project thesis employs a personal computer for on chip programming. The TRANS.EXE software is mainly responsible for the controls of the programmer circuit. It first reads the date (in HEX values) assembled by the C16 cross assembler, which is commercially available and places them in addresses. Then it communicates with the 68705, asking when it is available for downloading of the data. This is the hand-shaking part. It then sends all the data (in machine code) to the MCU through its peripheral ports. The batch file, TEST, controls the first process, from the assembler to the creation of the hex file data.The whole circuit, together with the software, will be a tool for the development of the prototype which the user will implement.