M68ICS08KX Freescale Semiconductor, M68ICS08KX Datasheet - Page 65

• Manufacturer Part Number: M68ICS08KX
• Description: SIM PROGRAM FOR 68HC908KX8/KX2
• Manufacturer: Freescale Semiconductor
• Type: Simulator/Programmerr

Specifications of M68ICS08KX

• Contents: Programmer, Power Supply, Assembler/Simulator/Debugger, Cable, Software and Documentation
• For Use With/related Products: 68HC908KX8/KX2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Glossary
User’s Manual
60
C — An abbreviation for carry/borrow in the condition codes register of the
CCR — An abbreviation for condition code register in the MC68HC908KX8.
clock — A square wave signal that is used to sequence events in a computer.
command set — The command set of a CPU is the set of all operations that
condition codes register — The CCR has five bits (H, I, N, Z, and C) that can
CPU — Central processor unit. The part of a computer that controls execution
CPU cycles — A CPU clock cycle is one period of the internal bus-rate clock.
CPU registers — Memory locations that are wired directly into the CPU logic
MC68HC908KX8. When adding two unsigned 8-bit numbers, the C bit
is set if the result is greater than 255 ($FF).
The CCR has five bits (H, I, N, Z, and C) that can be used to control
conditional branch instructions. The values of the bits in the CCR are
determined by the results of previous operations. For example, after a
load accumulator (LDA) instruction, Z will be set if the loaded value
was $00.
the CPU knows how to perform. One way to represent an instruction
set is with a set of shorthand mnemonics such as LDA meaning load A.
Another representation of an instruction set is the opcodes that are
recognized by the CPU.
be used to control conditional branch commands. The values of the bits
in the CCR are determined by the results of previous operations. For
example, after a load accumulator (LDA) instruction, Z will be set if
the loaded value was $00.
of instructions.
Normally, this clock is derived by dividing a crystal oscillator source
by two or more so the high and low times will be equal. The length of
time required to execute an instruction is measured in CPU clock
cycles.
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 an MC68HC908 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).
Glossary
M68ICS08KX In-Circuit Simulator
MOTOROLA