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參數(shù)資料
| 型號： | MC68HC05P9ACDW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 16/90頁 |
| 文件大?。?/td> | 285K |
| 代理商： | MC68HC05P9ACDW |
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GENERAL RELEASE SPECIFICATION
MC68HC05P9A
CENTRAL PROCESSING UNIT
MOTOROLA
Rev. 2.0
3-1
SECTION 3
CENTRAL PROCESSING UNIT
This section describes the ve CPU registers. CPU registers are not part of the
memory map.
3.1
Accumulator (A)
The accumulator is a general purpose 8-bit register used to hold operands and
results of arithmetic calculations or data manipulations.
3.2
Index Register (X)
The index register is an 8-bit register used for the indexed addressing value to
create an effective address. The index register also may be used as a temporary
storage area.
3.3
Condition Code Register (CCR)
The CCR is a 5-bit register in which four bits are used to indicate the results of the
instruction just executed, and the fth bit indicates whether interrupts are masked.
These bits can be tested individually by a program, and specic actions can be
taken as a result of their state. Each bit is explained in the following paragraphs.
3.3.1 H — Half Carry
This bit is set during ADD and ADC operations to indicate that a carry occurred
between bits 3 and 4.
70
A
70
X
CCR
H
I
NZC
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05P9ACP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P9ADW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P9AMDW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P9AMP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P9AP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
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