MC68HC05E5 Datasheet, PDF (27/140 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification — MC68HC05E5
Section 3. Central Processing Unit (CPU)
3.1 Contents
3.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.3 Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.4 Index Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.5 Condition Code Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
3.6 Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
3.7 Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
3.2 Introduction
The MCU contains five registers as shown in Figure 3-1. The interrupt
stacking order is shown in Figure 3-2.
7
7
12
PC
12
7
0 0 0 0 0 11
0
A
0
X
0
0
SP
CCR
H INZC
ACCUMULATOR
INDEX REGISTER
PROGRAM COUNTER
STACK POINTER
CONDITION CODE REGISTER
Figure 3-1. Programming Model
MC68HC05E5 — Rev. 1.0
General Release Specification
Central Processing Unit (CPU)
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