參數(shù)資料
型號: MC68HC705E6
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 86/140頁
文件大?。?/td> 788K
代理商: MC68HC705E6
Central Processing Unit
MC68HC05E6 — Rev. 1.0
Central Processing Unit
For More Information On This Product,
Go to: www.freescale.com
Introduction
This chapter describes the CPU registers and the HC05 instruction set.
CPU Registers
Figure 23
shows the five CPU registers. CPU registers are not part of the
memory map.
Accumulator
The accumulator is a general-purpose 8-bit register. The CPU uses the
accumulator to hold operands and results of arithmetic and
non-arithmetic operations.
Figure 23 Programming Model
ACCUMULATOR (A)
A
INDEX REGISTER (X)
X
SP
1
1
0
0
0
0
0
0
0
0
PCL
PCH
Z
C
I
N
1
H
1
1
0
4
7
5
CONDITION CODE REGISTER (CCR)
PROGRAM COUNTER (PC)
STACK POINTER (SP)
0
7
8
15
15
5
7
7
0
0
0
HALF-CARRY FLAG
INTERRUPT MASK
NEGATIVE FLAG
ZERO FLAG
CARRY/BORROW FLAG
10
6
2-cpu
F
Freescale Semiconductor, Inc.
n
.
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