By G. Jack Lipovski
Unmarried and Multi-Chip Microcontroller Interfacing teaches the rules of designing and programming microcontrollers that would be utilized in a large choice of digital and mechanical units, machines and structures. functions are vast, starting from controlling an vehicle to measuring, controlling and exhibiting your home's temperature. The e-book makes use of the recent Motorola 68Hc12 microcontroller because the fundamental instance all through. This new microprocessor is the most recent improvement in mid-level 16-bit microcontrollers that would be used around the world as a result of its comparatively cheap and straightforwardness of programming. The publication beneficial properties the preferred programming languages--C and C++--in describing uncomplicated and complex strategies. The 68Hc12 will change a number of the latest 8-bit microprocessors at present utilized in purposes and instructing. * First e-book on hand at the new Motorola 68HC12 microcontroller* Thorough dialogue of C and C++ programming of I/O ports and synchronization mechanisms* Concrete dialogue of purposes of the preferred, on hand, reasonably cheap and well-designed 68HC12* A CD-ROM with HiWare's specialist C++ compiler is incorporated with the ebook* Many examples and over 2 hundred difficulties on the finish of every chapters* Separate sections describing item -oriented interfacingThis ebook is perfect for pro engineers in addition to scholars in collage classes in micro-processors/microcontrollers in departments of electric engineering, computing device engineering or machine technology; it's also applicable for complicated technical tuition classes. The ebook may also be a useful expert reference for electric engineers and mechanical engineers in operating with the layout of digital and electromechanical units and platforms
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Extra info for Single and Multi-Chip Microcontroller Interfacing : For the Motorola 6812 (Academic Press Series in Engineering)
Motorola uses the term "direct addressing" for a short form of addressing that uses an 8-bit address, which we will call page zero addressing. Their terminology would be correct for a primary memory of only 256 words. Then direct addressing would just need to address a small memory, and addressing more memory would be called extended addressing. It seems the designers of the original 6800 assumed most systems would require only such a small (primary) memory. But as we now know, garbage accumulates to fill the container, so if we build a bigger container, it will soon be filled.
2 The 6812 Instruction Set 15 LDAA 1,SP+ The stack fills out, starting at high addresses and building toward lower addresses, in the stack buffer. If it builds into addresses lower than the stack buffer, a stack overflow error occurs, and if it is pulled too many times, a stack underflow error occurs. If no such errors occur, then the last word pushed onto the stack is the first word pulled from it, a property that sometimes labels a stack a LIFO (last-in, first-out) stack. Stack overflow or underflow often causes data stored outside of the stack buffer to be modified.
The 6812 has a memory expansion mechanism so the memory can exceed the 64K bytes allowed by a 16-bit address. 3. An expansion program page register PPAGE holds the high-order address bits. The CALL instruction saves PPAGE along with the program counter and loads both PPAGE and the program counter with new values. Return from call, RTC, pops the saved values back into the program counter and PPAGE. 1,2 The 6812 Instruction Set 27 Compare immediate can be used to skip over a 1-byte or 2-byte instruction.