參數(shù)資料
型號： MC68HC05C9AP
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, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 98/162頁
文件大?。?/td> 1093K
代理商： MC68HC05C9AP
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Central Processor Unit (CPU)
Advance Information
MC68HC05C9A — Rev. 5.0
40
Central Processor Unit (CPU)
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 here.
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, serial communications interface (SCI),
serial peripheral interface (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 0.
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.
相關(guān)PDF資料
PDF描述
MC68HSC05C9AB 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP42
MC68HC05C9AFN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
MC68HSC05C9ACB 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP42
MC68HSC05C9AFB 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP44
MC68HCL05C9AFN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05C9CP 制造商:Motorola Inc 功能描述:IC UP HCMOS 68HC05C9CP DIP40 0
MC68HC05C9E 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9ECFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9ECP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05CT4FB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
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