参数资料
型号: MC68HC08AS20CFN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PQCC52
封装: PLASTIC, LCC-52
文件页数: 16/96页
文件大小: 3243K
代理商: MC68HC08AS20CFN
3
MC68HC05E0
MOTOROLA
3-1
CPU CORE AND INSTRUCTION SET
3
CPU CORE AND INSTRUCTION SET
This section provides a description of the CPU core registers, the instruction set and the
addressing modes of the MC68HC05E0.
3.1
Registers
The MCU contains ve registers, as shown in the programming model of Figure 3-1. The interrupt
stacking order is shown in Figure 3-2.
3.1.1
Accumulator (A)
The accumulator is a general purpose 8-bit register used to hold operands and results of
arithmetic calculations or data manipulations.
Figure 3-1 Programming model
Accumulator
Index register
Program counter
Stack pointer
Condition code register
Carry / borrow
Zero
Negative
Interrupt mask
Half carry
7
0
7
0
15
7
0
15
7
0
0 0 0 0 0 0 0 1 1
7
0
1 1 1 H I N Z C
0
23
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