外文翻譯---基于單片機(jī)的十字路口交通燈控制器的設(shè)計

1、目錄I目 錄附件 附件 1：外文文獻(xiàn)原文 ………………………………………… 第 1 頁附件 附件 2：外文文獻(xiàn)譯文 ………………………………………… 第 11 頁附件 附件 3：硬件設(shè)計電路 ………………………………………… 第 20 頁附件 附件 4：軟件設(shè)計電路 ………………………………………… 第 23 頁附錄2About AT89C51(1) function characteristics description:A

2、T89C51 is a low power consumption, high performance CMOS8 bit micro-controller, has the 8K in system programmable Flash memory. Use high-density Atmel company the beltpassword nonvolatile storage technology and manufactu

3、ring, and industrial 80S51 product instructions and pin fully compatible. Chip Flash allow program memory in system programmable, also suitable for conventional programmer. In a single chip, have dexterous 8 bits CPU and

4、 in system programmable Flash, make AT89C51 for many embedded control application system provides the high flexible, super efficient solution. AT89C51 has the following standard function: 8k bytes Flash, 256 bytes RAM, 3

5、2-bit I/O mouth line, the watchdog timer, two data pointer, three 16 timer/counter, a 6 vector level 2 interrupt structure, full-duplex serial port, piece inside crystals timely clock circuit. In addition, AT89C51 can dr

6、op to 0Hz static logic operation, support two software can choose power saving mode. Idle mode, the CPU to stop working, allowing the RAM, timer/counter, serial ports, interruption continue to work. Power lost protection

7、 mode, RAM content being saved, has been frozen, microcontroller all work stop, until the next interruption or hardware reset so far. As shown in figure 1 for the AT89C51 pins allotment.P1.0 1P1.1 2P1.2 3P1.3 4P1.4 5P1.5

8、 6P1.6 7P1.7 8RST /Vpd 9(RXD)P3.0 10(TXD)P3.1 11(INT 0)P3.2 12(INT 1)P3.3 13(T0)P3.4 14(T1)P3.5 15(WR)P3.6 16(RD)P3.7 17XTAL 2 18XTAL 1 19END 20 P20(A8) 21 P21(A9) 22 P22(A10) 23 P23(A11) 24 P24(A12) 25 P25(A13) 26 P26(A

9、14) 27 P27(A15) 28 PSEN 29EA/Vpd 31ALE /PROG 30P0.7(AD7) 32 P0.6(AD6) 33 P0.5(AD5) 34 P0.4(AD4) 35 P0.3(AD3) 36 P0.2(AD2) 37 P0.1(AD1) 38 P0.0(AD0) 39 VCC 40Figure 1 the AT89C51 pins allotment(2) interrupt introductionAT

10、89C51 has six interrupt sources: two external interruption, (and), three timer interrupt (timer 0, 1, 2) and a serial interrupts. Each interrupt source can be passed buy bits or remove IE the relevant special register in

11、terrupt allow control bit respectively make effective or invalid interrupt source. IE also includes an interrupt allow total control bit EA, it can be a ban all interrupts. IE. Six is not available. For AT89C51, IE. 5 bi

12、ts are also not be used. User software should not give these bits write 1. They AT89 series for new product reserved. Timer 2 can be TF2 and the T2CON registers EXF2 or logical triggered. Program into an interrupt servic