
Glossary
M68ICS08MR In-Circuit Simulator
User
’
s Manual
MOTOROLA
Glossary
93
instead of being part of the addressable memory map. The CPU always
has direct access to the information in these registers. The CPU
registers in the HC08 are A (8-bit accumulator), X (8-bit index
register), CCR (condition code register containing the H, I, N, Z, and C
bits), SP (stack pointer), and PC (program counter). Memory locations
that hold status and control information for on-chip peripherals are
called I/O and control registers.
reset
—
Reset is used to force a computer system to a known starting point and
to force on-chip peripherals to known starting conditions.
S record
—
A Motorola standard format used for object code files.
SDIP
—
Skinny dual in-line package.
simulator
—
A computer program that copies the behavior of a real MCU.
source code
—
See source program.
SP
—
Abbreviation for stack pointer CPU register in the HC08 MCU.
source program
—
A text file containing instruction mnemonics, labels,
comments, and assembler directives. The source file is processed by an
assembler to produce a composite listing and an object file
representation of the program.
stack pointer
—
A CPU register that holds the address of the next available
storage location on the stack.
TTL
—
Transistor-to-transistor logic.
TVS
—
Transient voltage suppression.
V
DD
—
The positive power supply to a microcontroller (typically 5 volts dc).
V
SS
—
The 0-volt dc power supply return for a microcontroller.
Word
—
A group of binary bits. Some larger computers consider a set of
16 bits to be a word but this is not a universal standard.
X
—
Abbreviation for index register, a CPU register in the HC08.
Z
—
Abbreviation for zero, a bit in the condition code register of the HC08. A