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參數資料
型號: MC68HC05C9A
廠商: Motorola, Inc.
元件分類: 8位微控制器
英文描述: 8-Bit Microcontroller(8位微控制器)
中文描述: 8位微控制器(8位微控制器)
文件頁數: 36/160頁
文件大小: 783K
代理商: MC68HC05C9A
L
G
R
Central Processing Unit
General Release Specification
MC68HC05C9A
Rev. 4.0
36
Central Processing Unit
MOTOROLA
3.3.5 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 individually tested by a
program, and specific actions can be taken as a result of their state.
Each bit is explained in the following paragraphs.
Half Carry (H)
This bit is set during ADD and ADC operations to indicate that a carry
occurred between bits 3 and 4.
Interrupt (I)
When this bit is set, the timer, SCI, SPI, and external interrupt 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.
Negative (N)
When set, this bit indicates that the result of the last arithmetic, logical,
or data manipulation was negative.
Zero (Z)
When set, this bit indicates that the result of the last arithmetic, logical,
or data manipulation was zero.
Carry/Borrow (C)
When set, this bit indicates that a carry or borrow out of the arithmetic
logical unit (ALU) occurred during the last arithmetic operation. This
bit is also affected during bit test and branch instructions and during
shifts and rotates.
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相關代理商/技術參數
參數描述
MC68HC05C9AB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AFN 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AMB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AMFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
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