參數(shù)資料
型號： MC68HC705JJ7CDW
廠商： Freescale Semiconductor
文件頁數(shù)： 90/164頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 20-SOIC
標準包裝： 38
系列： HC05
核心處理器： HC05
芯體尺寸： 8-位
速度： 2.1MHz
連通性： SIO
外圍設備： POR，溫度傳感器，WDT
輸入/輸出數(shù)： 14
程序存儲器容量： 6KB（6K x 8）
程序存儲器類型： OTP
RAM 容量： 224 x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
數(shù)據(jù)轉換器： A/D 4x12b
振蕩器型： 內部
工作溫度： -40°C ~ 85°C
封裝/外殼： 20-SOIC（0.295"，7.50mm 寬）
包裝： 管件
Condition Code Register
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
31
3.6 Condition Code Register
The condition code register is an 8-bit register whose three most significant bits are permanently fixed at
111 as shown in Figure 3-6. The condition code register contains the interrupt mask and four flags that
indicate the results of the instruction just executed. The following paragraphs describe the functions of the
condition code register.
Half-Carry Flag (H)
The CPU sets the half-carry flag when a carry occurs between bits 3 and 4 of the accumulator during
an ADD or ADC operation. The half-carry flag is required for binary coded decimal (BCD) arithmetic
operations. Reset has no effect on the half-carry flag.
Interrupt Mask (I)
Setting the interrupt mask disables interrupts. If an interrupt request occurs while the interrupt mask is
a logic 0, the CPU saves the CPU registers on the stack, sets the interrupt mask, and then fetches the
interrupt vector. If an interrupt request occurs while the interrupt mask is set, the interrupt request is
latched. The CPU processes the latched interrupt as soon as the interrupt mask is cleared again.
A return-from-interrupt (RTI) instruction pulls the CPU registers from the stack, restoring the interrupt
mask to its cleared state. After a reset, the interrupt mask is set and can be cleared only by a CLI
instruction.
Negative Flag (N)
The CPU sets the negative flag when an arithmetic operation, logical operation, or data manipulation
produces a negative result. Reset has no affect on the negative flag.
Zero Flag (Z)
The CPU sets the zero flag when an arithmetic operation, logical operation, or data manipulation
produces a result of $00. Reset has no affect on the zero flag.
Carry/Borrow Flag (C)
The CPU sets the carry/borrow flag when an addition operation produces a carry out of bit 7 of the
accumulator or when a subtraction operation requires a borrow. Some logical operations and data
manipulation instructions also clear or set the carry/borrow flag. Reset has no effect on the
carry/borrow flag.
3.7 Arithmetic/Logic Unit (ALU)
The ALU performs the arithmetic and logical operations defined by the instruction set. The binary
arithmetic circuits decode instructions and set up the ALU for the selected operation. Most binary
arithmetic is based on the addition algorithm, carrying out subtraction as negative addition. Multiplication
is not performed as a discrete operation but as a chain of addition and shift operations within the ALU.
The multiply instruction (MUL) requires 11 internal clock cycles to complete this chain of operations.
Bit 7
654321
Bit 0
Read:
111
H
I
N
C
Z
Write:
Reset:
111
U
1
U
U = Unaffected
Figure 3-6. Condition Code Register (CCR)
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相關代理商/技術參數(shù)
參數(shù)描述
MC68HC705JP7CDW 功能描述:IC MCU 8BIT 28-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
MC68HC705JP7CP 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HC705K1CDW 制造商:Motorola Inc 功能描述:
MC68HC705KJ1CDW 功能描述:8位微控制器 -MCU 8 Bit 4MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68HC705KJ1CP 功能描述:IC MCU 4MHZ 1.2K OTP 16-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
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