單片機(jī)歷史外文翻譯-單片機(jī)-資料下載頁
2025-01-19 07:54本頁面
【導(dǎo)讀】單片機(jī)誕生于20世紀(jì)70年代末，經(jīng)歷了SCM、MCU、SoC三大階段。單片形態(tài)嵌入式系統(tǒng)的最佳體系結(jié)構(gòu)?！皠?chuàng)新模式”獲得成功，奠定了SCM與通用計(jì)算機(jī)。在開創(chuàng)嵌入式系統(tǒng)獨(dú)立發(fā)展道路上，Intel公司功不可沒。它所涉及的領(lǐng)域都與對(duì)象系統(tǒng)相關(guān)，因此，發(fā)展MCU的重任不可避免地落。在電氣、電子技術(shù)廠家。從這一角度來看，Intel逐漸淡出MCU的發(fā)展也有其客觀因素。在發(fā)展MCU方面，最著名的廠家當(dāng)數(shù)Philips公司。系統(tǒng)在芯片上的最大化解決；因此，專用單片機(jī)的發(fā)展自然形成了SoC化趨勢(shì)。因此，對(duì)單片機(jī)的理解可以從單片微型計(jì)算機(jī)、單片微控制器延伸到單片應(yīng)用系統(tǒng)。目前單片機(jī)滲透到我們生活的各個(gè)領(lǐng)域，幾乎很難找到哪個(gè)領(lǐng)域沒有單片機(jī)的蹤跡。過程的實(shí)時(shí)控制和數(shù)據(jù)處理，廣泛使用的各種智能IC卡，民用豪華轎車的安全保障系統(tǒng)，超聲診斷設(shè)備及病床呼叫系統(tǒng)等等。要求使用人員了解其內(nèi)部結(jié)構(gòu)。一執(zhí)行到MOVX指令，就會(huì)有相應(yīng)的信號(hào)從送出，不需要事先用指令說明。
【正文】 of address units is a must (see procedures for the implementation of the process). Third, P0 port, P2 and P3 of the second function I use: Beginners often on the P0 port, P2 and P3 port I use the second function puzzled that the second function and have a switch between the original function of the process, or have a directive, in fact, the port The second feature is automatic, do not need instructions to convert. Such as , respectively WR, RD signal, when the microchip processing machines external RAM or external I / O port, they are used as a second function, not as a generalpurpose I / O port used, so long as a A microprocessor implementation of the MOVX instruction, there will be a corresponding signal sent from the or , no prior use of mands. In fact 39。not as a generalpurpose I / O port use39。 is also not a 39。no39。 but (user) 39。not39。 as a generalpurpose I / O port to use. You can arrange the order of a SETB 39。s instructions, and when the MCU execution to the instruction, the also make into a high, but users will not do so because this is usually will cause the system to collapse. Fourth, the program39。s implementation: Reduction in power after the 8051 microcontroller within the program counter (PC) in the value of 0000 39。, the process is always from the 000039。 units started, that is: the system must exist in ROM 0000 39。this unit , and in 0000 39。unit must be stored in a single instruction. 5, the stack: Stack is a region, is used to store data, there is no special about the region itself is a part of internal RAM, special access to its data storage and the way that the socalled 39。advanced post out backward first out 39。, and the stack has a special data transmission instructions that39。 PUSH 39。and39。 POP 39。, has a special expertise in its services unit, that is, the stack pointer SP, whenever a PUSH instruction execution, SP on (in the Based on the original value) automatically add 1, whenever the implementation of a POP instruction, SP will (on the basis of the original value) automatically by 1. As the SP values can be changed with the instructions, so long as the beginning of the process to change the value of the SP, you can set the stack memory unit required, such as the program begins, with an MOV SP, 5FH instructions When set on the stack starting from the memory unit 60H unit. There is always the beginning of the general procedure with such a directive to set the stack pointer, because boot, SP initial value of 07H, 08H This unit from the beginning to stack next, and 08H to 1FH 8031 is the second in the region, three or four working register area, often used, this will lead to confusion of data. Different authors when writing programs, initialize the stack is not exactly the same directive, which is the author39。s habit. When set up the stack zone, does not mean that the region bee a special memory, it can still use the same memory region as normal, but generally the programmer does not regard it as an ordinary memory used.
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