- 您现在的位置：买卖IC网 > PDF目录97870 > DS87C520-ECL (MAXIM INTEGRATED PRODUCTS INC) 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP44 PDF资料下载
参数资料
| 型号： | DS87C520-ECL |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Microcontroller |
| 英文描述： | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | 10 X 10 MM, 1 MM HEIGHT, TQFP-44 |
| 文件页数： | 42/43页 |
| 文件大小： | 709K |
| 代理商： | DS87C520-ECL |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页当前第42页第43页
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
8 of 43
The relative time of two instructions might be different in the new architecture than it was previously. For
example, in the original architecture, the “MOVX A, @DPTR” instruction and the “MOV direct, direct”
instruction used two machine cycles or 24 oscillator cycles. Therefore, they required the same amount of
time. In the DS87C520/DS83C520, the MOVX instruction takes as little as two machine cycles or eight
oscillator cycles but the “MOV direct, direct” uses three machine cycles or 12 oscillator cycles. While
both are faster than their original counterparts, they now have different execution times. This is because
the DS87C520/DS83C520 usually use one instruction cycle for each instruction byte. The user concerned
with precise program timing should examine the timing of each instruction for familiarity with the
changes. Note that a machine cycle now requires just 4 clocks, and provides one ALE pulse per cycle.
Many instructions require only one cycle, but some require five. In the original architecture, all were one
or two cycles except for MUL and DIV. Refer to the High-Speed Microcontroller User’s Guide for
details and individual instruction timing.
SPECIAL FUNCTION REGISTERS
Special Function Registers (SFRs) control most special features of the DS87C520/DS83C520. This
allows the DS87C520/DS83C520 to have many new features but use the same instruction set as the 8051.
When writing software to use a new feature, an equate statement defines the SFR to an assembler or
compiler. This is the only change needed to access the new function. The DS87C520/DS83C520
duplicate the SFRs contained in the standard 80C52. Table 1 shows the register addresses and bit
locations. The High-Speed Microcontroller User’s Guide describes all SFRs.
相关PDF资料 |
PDF描述 |
|---|---|
| DS87C520-MNL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PDIP40 |
| DS87C520-ENL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP44 |
| DS87C520-WCL | 8-BIT, UVPROM, 33 MHz, MICROCONTROLLER, CDIP40 |
| DS87C530-ENL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP52 |
| DS87C530-QCL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC52 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS87C520-ECL+ | 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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 |
| DS87C520-ENL | 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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 |
| DS87C520-ENL+ | 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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 |
| DS87C520-FCL | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| DS87C520MCL | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:EPROM/ROM High-Speed Microcontrollers |
发布紧急采购，3分钟左右您将得到回复。