Page 45 - Introduction to Microcontrollers Architecture, Programming, and Interfacing of The Motorola 68HC12

22 Chapter! Basic Computer Structure and the 6812

manual for the 'A4, M68HC812A4TS/D, which describe their I/O systems. Motorola is
generous with these manuals and maintains them better than we can in an appendix in
this book, so we recommend that you order the manuals from Motorola that you need to
accompany this book. Finally, if you are already an accomplished assembly language
programmer on another computer or microcomputer, you might find this book too
simple and spread out. We might offer Chapter 1 of the text Single- and Multiple-Chip
Microcontroller Interfacing (G. J. Lipovski), as a condensed summary of much of the
material in this text.

Do You Know These Terms?

This is a list of all italicized words in this chapter. You should check these terms to be
sure that you recognize their meaning before going on to the next chapter. These terms
also appear in the index, with page numbers for reference, so you can look up those that
you do not understand.

von Neumann random access hexadecimal memory
computer memory number (EEPROM)
memory (RAM) machine code serial peripheral
controller read only memory machine interface (SPI)
data operator (ROM) debug serial
input-output (I/O) volatile assembler communication
register nonvolatile source code interface (SCI)
microprocessor program mnemonic timer
microcomputer instruction immediate A/D converter
single-chip instruction cycle addressing erasable programmable
microcontroller fetch/execute operand read-only memory
MPU cycle direct addressing (EPROM)
byte fetch carry bit programmable
word fetch phase (carry) read-only
line recall condition code memory
wire execute phase register (PROM)
bus accumulator half-carry memory map
clock effective address static efficiency flash memory
clock cycle one-address dynamic pulse-width
clock rate computer efficiency modulator
clock frequency addressing mode clarity (PWM)
read operation code single-chip mode Byte Data Link
read/write line byte electrically Communication
write operation code erasable Module (BDLC)
access (op code) programmable