1、水温控制系统总设计课 题 名 称 水温控制系统 毕业实践任务书 1 份 答辩表 份毕业设计说明书（论文） 1 份 共 页外 文 翻 译 1 份 共 10 页另 附 图（表） 个 共 页其 它 材 料 份 共 页 课 题 名 称 水温控制系统 1.毕业实践任务书-12.外文翻译-23.毕业实践调研报告-124.毕业设计说明书-155.毕业实践总结-376.参考文献-397.附录- -40外文翻译： PIC series monolithic integrated circuit characteristicAlong with the large scale integrated circuit
2、 (LSI) the manufacture technology rapid development, the computer is facing two obvious directions (namely two big branches) to develop: One is the microcomputer system performance enhances unceasingly, by satisfies the high velocity large capacity data processing ; Two is the monolithic microcomput
3、er function consummates day by day, by satisfies many domains each kind of intriguing scene control .The Texas instrument company invented after 1975 in the world the first 4 monolithic integrated circuit TMS - 1,000 births, some large-scale micro electron companies competed to develop have develope
4、d each kind of monolithic integrated circuit series product. Divides from the word length aspect, the monolithic integrated circuit has 4, 8, 16, 32 four big kinds, first three kinds occupied the monolithic integrated circuit market main share, in the middle of these three kind of monolithic integra
5、ted circuits, 8 machine continuously primarily flows the product.Has the representative 4 monolithic integrated circuits to have the American Texas instrument company TMS - 1,000, Nippon Electric Company (NEC) mu PD75 long neck hair series, American country semiconductor company (NS) COP400 series,
6、American 洛克威尔 company (ROCKWELL) PPS/1 series, Japanese Matushita companys MN1400 series, Japanese Fujitsu Corporations MB88 series as well as Japanese Sharp Corporations SM long neck hair series and so on.Has the representative 8 monolithic integrated circuits to have the American micro chip compan
7、y the PIC16C long neck hair series, the PIC17C long neck hair series, the PIC1400 series, American Intel Corporations MCS - 48 and the MCS - 51 series, the American Motorola Corporations MC68HC05 series and the MC68HC11 series, the American uneven speech companys Z8 series, the Nippon Electric Compa
8、ny mu the PD78 long neck hair series, American Mosse the Turk company and young attendants to the immortals company cooperative production F8 (3,870) the series and so on. Has the representative 16 monolithic integrated circuits has American Mosse Turk company MC68200, the American Intel Corporation
9、s MCS - 96 series, the Nippon Electric Company mu the PC14040 series, the American country semiconductor company (NS) 783 long neck hair series and so on.At present, the monolithic integrated circuit is facing internal memory RAM and the ROM capacity is big, I/The O port function many, the supply vo
10、ltage scope width, the power dissipation are low, the operating speed quick direction develops.In the above each kind of monolithic integrated circuit, why does this course select the micro chip company PIC in the series PIC16F873 monolithic integrated circuit to take the model introduction?The PIC
11、series monolithic integrated circuit hardware system design is succinct, command system design fining. In the middle of all monolithic integrated circuits variety, it is easiest to study, one of easiest application monolithic integrated circuit varieties. Said regarding the monolithic integrated cir
12、cuit beginner, if chooses the PIC monolithic integrated circuit achievement to capture the monolithic integrated circuit kingdom the breach , will be a most relaxed shortcut, decides can obtain the twice the result with half the effort effect. At present had several famous semiconductors companies t
13、o imitate the PIC series monolithic integrated circuit, develops and it pin compatible series monolithic integrated circuit, for instance American SCENIX Corporations SX series, Taiwan EMC Corporations EM78P series, Taiwan MDT Corporations MDT series and so on. Below the PIC series monolithic integr
14、ated circuit has the characteristic: (1) uses the Harvard structure. In the home most common monolithic integrated circuit, the PIC series monolithic integrated circuit is the only 11 kinds uses the Harvard structure in the chip interior the type. Here said the Harvard structure is, in chip interior
15、 data bus and command line separation, and uses the different width. Does this the advantage is, is advantageous for the realization streamlined production , also is while carries out instruction to carry on to the next instruction takes refers to the operation, but in the common monolithic integrat
16、ed circuit, the command line and the data bus is uses in common. and has used the different width, therefore program memory ROM and the data-carrier storage RAM addressing space is mutually independent, moreover two kind of memories widths are also different. Like this designs not only may guarantee
17、 the data the security, but also can enhance the running rate and realize the complete instruction the single byte . byte said which in this , refers in particular to the PIC monolithic integrated circuit the instruction byte, but is not 8 bits bytes which often said. For example, PIC12C50 / The PIC
18、16C5 series monolithic integrated circuit instruction byte is 12 bits; PIC16C6 / PIC16C7 / The PIC16C8 series instruction byte is 14 bits; The PIC17C long neck hair series instruction byte is 16 bits. Their data-carrier storage all is 8 widths. But MCS - 51 series monolithic integrated circuits ROM
19、and the RAM width all is 8, the command length from 1 byte (8) to 3 bytes lengths not one. (3) simplifies the set of instructions (RISC) the technology. PIC series monolithic integrated circuit command system only then 35 instructions. This for the instruction study, the memory, the understanding br
20、ings the very big advantage, also gives the procedure the compilation, reading, the debugging, the revision, the exchange brings the enormous convenience, really it may be said is easy to study easily to use . But the MCS - 51 monolithic integrated circuits command systems altogether have 111 instru
21、ctions, the MC68HC05 monolithic integrated circuit command system altogether have 89 instructions. PIC series monolithic integrated circuit not only complete instruction for single byte instruction, moreover the overwhelming majority instruction for the single cyclical instruction, by favors the enh
22、ancement to carry out the speed.(4) the addressing way is simple. The addressing way is seeks the operand the method. The PIC series monolithic integrated circuit only then 4 addressing ways (namely register indirect addressing, immediately number addressing, direct addressing and position addressin
23、g, later will make detailed explanation), will be easy to grasp, but MCS - 51 monolithic integrated circuits then will have 7 addressing ways, the 68HC05 monolithic integrated circuit will have 6 kinds.(5) the code compression ratio is high. The 1K byte memory space, regarding likes the MCS - 51 suc
24、h monolithic integrated circuits, only can deposit 600 instructions approximately, but regarding PIC series monolithic integrated circuit then can deposit reaches 1,024 instructions strip number. May see from chart 1, compares with several kind of typical monolithic integrated circuits, PIC16C5 is o
25、ne kind most saves the program memory space the monolithic integrated circuit. In other words, completes the space which the same function section of procedures takes, MC68HC05 is PIC16C5 2.24 times. (6) the running rate is high. Because has used the Harvard main line structure, also because instruc
26、tion reading has selected the streamlined production method with the execution, the PIC series monolithic integrated circuit running rate enhances greatly. May see from chart 2, the PIC series monolithic integrated circuit running rate is higher than other same scales by far the monolithic integrate
27、d circuit. In all 8 machine center, PIC17C is in the present world one of speed quickest varieties. (7) the power loss is low. The PIC series monolithic integrated circuit power dissipation is extremely low, some models monolithic integrated circuit works when the 4MHz clock consumes the electricity
28、 not to surpass 2mA, lowers under the sleep pattern to 1 mu A below.(8) driving force. I/The O port actuates the load the ability to be strong, each I/The O pin inspiration and the output current maximum value may respectively achieve 25mA and 20mA, can the direct drive light emitter diode, the phot
29、oelectricity coupler or the miniature relay and so on.(9) has I2C and the SPI serial main line port: PIC series monolithic integrated circuit some models have I2C and the SPI serial main line port. I2C and SPI respectively are invents by PHILIPS and MOTOROLA Corporation realizes the synchronization
30、serial data transmission sdt two kind of serial main lines technology between the chip. May facilitate using the monolithic integrated circuit serial main line port nimbly expands some essential periphery components. Serial interface and serial main line establishment, not only simplified the monoli
31、thic integrated circuit application system structure greatly, moreover extremely is also easy to form the product electric circuit the modular structure. At present, company and so on Matushita, Hitachi, Sony, Sharp, rainbow all in product and so on its large screen in color television has introduced the I2C technology.(10) the addressing space design is succinct. The PIC series monolithic integrated circuit procedure, the storehouse, the data three use mutually the independent addressing
