單片機(jī)畢業(yè)設(shè)計(jì)(論文)外文資料翻譯---51系列單片機(jī)的結(jié)構(gòu)和功能-單片機(jī)-在線瀏覽
2025-03-24 07:59本頁(yè)面
【正文】 間和外部數(shù)據(jù)存儲(chǔ)空間。（ 2）外部數(shù)據(jù)存儲(chǔ)器地址空間為 64KB，地址是從 0000H 到 FFFFH（含 16 個(gè)地址）的位置排列也。上述三個(gè)重疊的內(nèi)存空間地址，用 8051 指令系統(tǒng)的傳輸不同的數(shù)據(jù)和使用的功能區(qū)分。 8051 單片機(jī)有 4 個(gè) 8 并行的 I / O 端口，分別為 P0， P1， P2 和 P3。每一個(gè) I / O 線可作為獨(dú)立的入口和出口。使數(shù)據(jù)能夠鎖存輸出，數(shù)據(jù)可以及時(shí)緩沖，其余四個(gè)具有相同的功能。 P3 口的輸出級(jí)別小于 P1，可以在里面繪制負(fù)載電阻，每一個(gè)都能驅(qū)動(dòng) 4 個(gè) LS型 TTL 負(fù)載輸出?？梢岳酶淖冸娮璧妮敵龃笮。苯拥爻洚?dāng)震蕩開(kāi)路，不需要添加外部電阻。當(dāng)在當(dāng)做輸入口時(shí)，必須把相應(yīng)的端口置 1 來(lái)鎖閉輸出。其主要功能是把初始地址設(shè)為 0000H，使單片機(jī)從 0000H 的地址開(kāi)始運(yùn)行程序。在 8051 中 RST 引腳是一個(gè)輸入復(fù)位鍵，復(fù)位鍵高電平信號(hào)有效，要保證 24 倍 以上的時(shí)鐘周期（即 2 個(gè)機(jī)器周期）。 初始化時(shí)，需要兩部分外部電路。復(fù)位功能的可靠性，適合 6v 電壓的電容震蕩電路，復(fù)位信號(hào)的周期可以大于兩個(gè)機(jī)器周期。一個(gè)單片機(jī)系統(tǒng)能否正常運(yùn)行，應(yīng)先檢查它有沒(méi)有正確的復(fù)位電路。 附件 2：外文原文 Structure and function of the MCS51 series Structure and function of the MCS51 series onechip puter MCS51 is a name of a piece of onechip puter series which Intel Company produces. This pany introduced 8 topgrade onechip puters of MCS51 series in 1980 after introducing 8 onechip puters of MCS48 series in 1976. It belong to a lot of kinds this line of onechip puter the chips have,such as 8051, 8031, 8751, 80C51BH, 80C31BH,etc., their basic position, basic performance and instruction system are all the same. 8051 daily representatives 51 serial onechip puters . Early MCU 8bit or all of the four. One of the most successful is the INTEL 8031, because the performance of a simple and reliable access to a lot of good praise. Then developed in 8031 out of MCS51 MCU Systems. SCM systems based on this system until now is still widely used. With the increased requirements of industrial control field, began a 16bit microcontroller, because the cost is not satisfactory but have not been very widely used. After 90 years with the great development of consumer electronics, microcontroller technology has been a huge increase. With INTEL i960 series, especially the later series of widely used ARM, 32bit microcontroller quickly replace highend 16bit MCU status and enter the mainstream market. The traditional 8bit microcontroller performance have been the rapid increase capacity increase pared to 80 the number of times. Currently, highend 32bit microcontroller clocked over 300MHz, the performance catching the mid9039。s largest puter. Modern human life used in almost every piece of electronic and mechanical products will be integrated single , telephone, calculator, home appliances, electronic toys, handheld puters and puter accessories such as a mouse with a 12 in both the Department of SCM. Personal puter will have a large number of SCM in the work. General car with more than 40 SCM, plex industrial control systems may even have hundreds of SCM in the same time work! SCM is not only far exceeds the number of PC and other puting the sum, or even more than the number of human beings. An onechip puter system is made up of several following parts: ( 1) One microprocessor of 8 (CPU). ( 2) At slice data memory RAM (128B/256B),it use not depositting not can reading /data that write, such as result not middle of operation, final result and data wanted to show, etc. ( 3) Procedure memory ROM/EPROM (4KB/8KB ), is used to preserve the procedure , some initial data and form in slice. But does not take ROM/EPROM within some onechip puters, such as 8031 , 8032, 80C ,etc.. ( 4) Four 8 run side by side I/
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