MC68HC05P18 Datasheet, PDF (35/144 Pages) Freescale Semiconductor, Inc – Advance Information

Freescale Semiconductor, Inc.
Advance Information — MC68HC05P18/MC68HC805P18
Section 3. Central Processing Unit (CPU)
3.1 Contents
3.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
3.3 CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
3.3.1 Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
3.3.2 Index Register (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
3.3.3 Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . . . .37
3.3.3.1
3.3.3.2
3.3.3.3
Half Carry (H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Interrupt (I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Negative (N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.3.3.4 Zero (Z) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.3.3.5 Carry/Borrow (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.3.4 Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.3.5 Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3.2 Introduction
This section describes the CPU registers.
MC68HC(8)05P18 — Rev. 2.0
MOTOROLA
Central Processing Unit (CPU)
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Advance Information
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