参数资料
型号: M68HC705UGANG
厂商: 飞思卡尔半导体(中国)有限公司
英文描述: High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
中文描述: 高密度互补金属氧化物半导体(HCMOS)微控制器
文件页数: 73/112页
文件大小: 809K
代理商: M68HC705UGANG
MC68HC05BD3
9-1
CPU CORE AND INSTRUCTION SET
9
9
CPU CORE AND INSTRUCTION SET
This section provides a description of the CPU core registers, the instruction set and the
addressing modes of the MC68HC05BD3.
9.1
Registers
The MCU contains five registers, as shown in the programming model of Figure 9-1. The interrupt
stacking order is shown in Figure 9-2.
9.1.1
Accumulator (A)
The accumulator is a general purpose 8-bit register used to hold operands and results of
arithmetic calculations or data manipulations.
Figure 9-1
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
0
7
0
0
15
7
0
0 0 0 0 0 0 0 1 1
7
1 1 1 H I N Z C
0
0
TPG
71
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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