參數(shù)資料
型號(hào): MC68HC05P4ADWR3
廠商: FREESCALE SEMICONDUCTOR INC
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: PLASTIC, SOIC-28
文件頁(yè)數(shù): 29/102頁(yè)
文件大?。?/td> 930K
代理商: MC68HC05P4ADWR3
Advance Information
MC68HC05P4A — Rev. 6.0
32
Central Processor Unit (CPU)
MOTOROLA
Central Processor Unit (CPU)
3.4 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.
3.5 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 fifth bit indicates whether
interrupts are masked. These bits can be tested individually by a
program, and specific actions can be taken as a result of their state.
Each bit is explained in the following paragraphs.
3.5.1 H — Half Carry
This bit is set during ADD and ADC operations to indicate that a carry
occurred between bits 3 and 4.
3.5.2 I — Interrupt
When this bit is set, timer and external interrupts are masked (disabled).
If an interrupt occurs while this bit is set, the interrupt is latched and
processed as soon as the interrupt bit is cleared.
3.5.3 N — Negative
When set, this bit indicates that the result of the last arithmetic, logical,
or data manipulation was negative.
70
X
CCR
HIN
Z
C
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05P4DW 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
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MC68HC05P6_1 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC05P8 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT