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Pinout: C High-performance 32-bit RISC Architecture C High-density 16-bit Instruction Set C Leader in MIPS/Watt C Little-endian C Embedded ICE (In-circuit Emulation) 8-, 16- and 32-bit Read and Write Support 256K Bytes of On-chip SRAM C 32-bit Data Bus C Single-clock Cycle Access Fully Programmable External Bus Interface C Maximum External Address Space of 64M Bytes C Up to Eight Chip Selects C Software Programmable 8/16-bit External Data Bus Eight-level Priority, Individually Maskable, Vectored Interrupt Controller C Four External Interrupts, including a High-priority, Low-latency Interrupt Request 32 Programmable I/O Lines Three-channel 16-bit Timer/Counter C Three External Clock Inputs C Two Multi-purpose I/O Pins per Channel Two USARTs C Two Dedicated Peripheral Data Controller Channels per USART Programmable Watchdog Timer Advanced Power-saving Features C CPU and Peripheral Can be Deactivated Individually Fully Static Operation: C 0 Hz to 75 MHz Internal Frequency Range at VDDCORE = 1.8V, 85C 2.7V to 3.6V I/O Operating Range 1.65V to 1.95V Core Operating Range -40C to +85C Temperature Range Available in 100-lead TQFP Package
M5L8253P-5引脚说明: C型高性能32位RISC架构C高密度以MIPS /瓦C小端C十六位指令集C领袖嵌入式冰8 - 16 -位和32位的读写支持256K的片上SRAM的 32位数据总线C单时钟周期存取字节完全可编程的外部总线接口C最大的外部地址空间的64M字节多达8个C芯片选择C软件可编程8位外部数据总线8级优先级,独立可屏蔽,向量中断控制器C四外部中断,其中包括一个高优先级,低延迟中断要求32个可编程I / O口线三通道16位定时器/计数器C三个外部时钟输入C两多用途I / O引脚每通道2个通用同步C两专用外设数据控制器通道每个USART可编程看门狗定时器先进的节能特性 CPU和外设可停用独立全静态工作中:C 0 Hz至75 MHz的频率范围内的VDDCORE = 1.8,85℃2.7V到3.6VI / O的操作1.65V到1.95V范围核心工作电压范围在- 40C至+85 C温度范围内使用的100引脚TQFP封装
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Uniprocessor designs have built-in bottlenecks.the address and data buses restrict data transfers to a one-at-a-time flow of traffic.the program counter forces instructions to be run in strict sequence.even if improvements in performance are achieved by means of faster processors and more instruction parallelism,operations are still run in strict sequence.however,in a uniprocessor,an increase in processor speed is not the total answer because other factors,such as the system bus and memory,come into play.
单处理器设计有内置的一些瓶颈。地址和数据总线限制数据传输的同时同地址的数据冲突情况。即使是通过更快的处理器和更多的并行指令,当然也包括维护,这些方式来提高的性能,程序的运行仍然被限制在严格的程式规则中。然而,在一个单处理器里,处理器速度的提高时不能完全解决这个问题的,这是因为像系统总线和存储器等其他因素同样在起作用。
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one address instruction:单地址指令
one address 单地址 | one address instruction 单地址指令 | one digit 单位的
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one address instruction format:一地址指令格式
one-address instruction 单地址指令,一地址指令 | one-address instruction format 一地址指令格式 | one-address message 单地址消息
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One Plus One Address:单地址指令
one output 非破坏性游标 | One Plus One Address 单地址指令 | one-chip 一加一地址
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single address order code:单地址指令码
single address instruction 单地址指令 | single address order code 单地址指令码 | single addressed telex 单址电传
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single address instruction:单地址指令
single address code 单地址码 | single address instruction 单地址指令 | single address message 单地址信息
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single address instruction format:单地址指令形式
single-address code 单地址码 | single-address instruction format 单地址指令形式 | single-address message 单地址信息
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single address system:单地址系统
single address instruction 单地址指令 | single address system 单地址系统 | single factor method 单因子法
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single address message:单地址信息
single address instruction 单地址指令 | single address message 单地址信息 | single assignment language 单赋值语言
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single address message:单地址报文,单地址信息
single address instruction format 单地址指令形式 | single address message 单地址报文,单地址信息 | single adjustable switch box 单连活络开关箱
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single address machine:单地址计算机
single address instruction 单地址指令 | single address machine 单地址计算机 | single address message 单地址信息