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参数资料
| 型号： | MCHC11F1CFNE2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, EEPROM, MICROCONTROLLER, PQCC68 |
| 封装： | ROHS COMPLIANT AND HALOGEN FREE, PLASTIC, LCC-68 |
| 文件页数： | 88/162页 |
| 文件大小： | 4554K |
| 代理商： | MCHC11F1CFNE2 |
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CENTRAL PROCESSING UNIT
MOTOROLA
TECHNICAL DATA
3-7
3.1.6.8 Stop Disable (S)
Setting the STOP disable (S) bit prevents the STOP instruction from putting the
M68HC11 into a low-power stop condition. If the CPU encounters a STOP instruction
while the S bit is set, it is treated as a no-operation (NOP) instruction, and processing
continues to the next instruction. S is set by reset — STOP disabled by default.
3.2 Data Types
The M68HC11 CPU supports the following data types:
Bit data
8-bit and 16-bit signed and unsigned integers
16-bit unsigned fractions
16-bit addresses
A byte is eight bits wide and can be accessed at any byte location. A word is composed
of two consecutive bytes with the most significant byte at the lower value address. Be-
cause the M68HC11 is an 8-bit CPU, there are no special requirements for alignment
of instructions or operands.
3.3 Opcodes and Operands
The M68HC11 family of microcontrollers uses 8-bit opcodes. Each opcode identifies
a particular instruction and associated addressing mode to the CPU. Several opcodes
are required to provide each instruction with a range of addressing capabilities. Only
256 opcodes would be available if the range of values were restricted to the number
able to be expressed in 8-bit binary numbers.
A four-page opcode map has been implemented to expand the number of instructions.
An additional byte, called a prebyte, directs the processor from page 0 of the opcode
map to one of the other three pages. As its name implies, the additional byte precedes
the opcode.
A complete instruction consists of a prebyte, if any, an opcode, and zero, one, two, or
three operands. The operands contain information the CPU needs for executing the
instruction. Complete instructions can be from one to five bytes long.
3.4 Addressing Modes
Six addressing modes can be used to access memory: immediate, direct, extended,
indexed, inherent, and relative. These modes are detailed in the following paragraphs.
All modes except inherent mode use an effective address. The effective address is the
memory address from which the argument is fetched or stored, or the address from
which execution is to proceed. The effective address can be specified within an in-
struction, or it can be calculated.
3.4.1 Immediate
In the immediate addressing mode an argument is contained in the byte(s) immediate-
ly following the opcode. The number of bytes following the opcode matches the size
of the register or memory location being operated on. There are two-, three-, and four-
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For More Information On This Product,
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCHC11F1CFNE2 | 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC |
| MCHC11F1CFNE2R | 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512EE RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| MCHC11F1CFNE3 | 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512EE RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| MCHC11F1CFNE3 | 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC |
| MCHC11F1CFNE3R | 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512EE RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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