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In operation the Single Chip Microcomputer (SCM) is connected to a host PC microcomputer via a serial port, and includes: 8051 Microcontroller Built-in Monitor, 8K RAM Expandable to 16K, 3 x 8 Bit Buffered I/O Ports, 8051 Timers, Interrupts & Handshaking and Courseware.
The SCM is supplied fitted with an 8751 chip. This chip features internal ROM containing a versatile, real time monitor to communicate with a PC via the built-in serial port. The monitor includes a line assembler, dissembler, break points, single stepping and the facility to examine and change memory or register contents. A special function of the monitor is to store the program under development in the RAM of the SCM development board. The great advantage of the method is that direct access to the I/O ports provided by the 8051 is retained.
Once a program has been completed on the SCM development system it can be easily transferred into the ROM of another 8751 via an EPROM Programmer. This second 8751, now containing the control program can be removed for the programmer and installed into the target board. Most importantly, because direct access to the Input / Output ports of the 8751 has been retained during the development stage there is no need for peripheral I/O and address decoding strips, only the 8751 chip is required. A number of add-on boards are available including a port monitor board, Multi channel ADC, screw terminal board and output driver board and target board. Single chip Micro-Control, not multi-chip control is realised.
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