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參數(shù)資料
| 型號： | MC68HC705V8FN |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68 |
| 封裝： | PLASTIC, LCC-68 |
| 文件頁數(shù)： | 111/172頁 |
| 文件大?。?/td> | 615K |
| 代理商： | MC68HC705V8FN |
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MOTOROLA
SECTION 4: CPU CORE
Page 32
MC68HC705V8 Specification Rev. 2.1
In indexed addressing with no offset, the index register contains the low byte of the operand
address, and the high byte is assumed to be $00. In indexed addressing with an 8-bit offset,
the CPU finds the operand address by adding the index register contents to an 8-bit
immediate value. In indexed addressing with a 16-bit offset, the CPU finds the operand
address by adding the index register contents to a 16-bit immediate value
The index register can also serve as an auxiliary accumulator for temporary storage. The
index register is unaffected by a reset of the device.
4.1.3
STACK POINTER (SP)
The stack pointer shown in Figure 4-1 is a 16-bit register internally. In devices with memory
maps less than 64 Kbytes the unimplemented upper address lines are ignored. The stack
pointer contains the address of the next free location on the stack. During a reset or the
reset stack pointer (RSP) instruction, the stack pointer is set to $00FF. The stack pointer is
then decremented as data is pushed onto the stack and incremented as data is pulled from
the stack.
When accessing memory, the ten most significant bits are permanently set to 0000000011.
The six least significant register bits are appended to these ten fixed bits to produce an
address within the range of $00FF to $00C0. Subroutines and interrupts may use up to 64
($40) locations. If 64 locations are exceeded, the stack pointer wraps around and writes
over the previously stored information. A subroutine call occupies two locations on the
stack and an interrupt uses five locations.
4.1.4
PROGRAM COUNTER (PC)
The program counter shown in Figure 4-1 is a 16-bit register internally. In devices with
memory maps less than 64 Kbytes the unimplemented upper address lines are ignored.
The program counter contains the address of the next instruction or operand to be fetched.
Normally, the address in the program counter increments to the next sequential memory
location every time an instruction or operand is fetched. Jump, branch, and interrupt
operations load the program counter with an address other than that of the next sequential
location.
4.1.5
CONDITION CODE REGISTER (CCR)
The CCR shown in Figure 4-1 is a 5-bit register in which four bits are used to indicate the
results of the instruction just executed. The fifth bit is the interrupt mask. These bits can be
individually tested by a program, and specific actions can be taken as a result of their state.
The condition code register should be thought of as having three additional upper bits that
are always ones. Only the interrupt mask is affected by a reset of the device. The following
paragraphs explain the functions of the lower five bits of the condition code register.
4.1.5.1
Half Carry Bit (H-Bit)
When the half-carry bit is set, it means that a carry occurred between bits 3 and 4 of the
accumulator during the last ADD or ADC (add with carry) operation. The half-carry bit is
required for binary-coded decimal (BCD) arithmetic operations.
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| MC68HC711D3CFN2 | 功能描述:IC MCU 2MHZ 4K OTP 44-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)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(shè)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(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)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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