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參數(shù)資料
| 型號： | MC68L11F1CFNE3 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 84/158頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU 8BIT 3MHZ 68-PLCC |
| 標(biāo)準(zhǔn)包裝： | 18 |
| 系列： | HC11 |
| 核心處理器： | HC11 |
| 芯體尺寸： | 8-位 |
| 速度： | 3MHz |
| 連通性： | SCI，SPI |
| 外圍設(shè)備： | POR，WDT |
| 輸入/輸出數(shù)： | 30 |
| 程序存儲器類型： | ROMless |
| EEPROM 大?。?/td> | 512 x 8 |
| RAM 容量： | 1K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 3 V ~ 5.5 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x8b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 68-LCC（J 形引線） |
| 包裝： | 管件 |
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CENTRAL PROCESSING UNIT
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,
Go to: www.freescale.com
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| MC68L11K1FUE2 | 功能描述:8位微控制器 -MCU 8B MCU L-VOLTAGE-EPP 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(fēng)格:SMD/SMT |
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