自己动手制造at89c51编程器 （英文）

文章摘要：Figure 2 shows the circuit diagram of the interface adapter card required for the programming of 20 pin Flash devices. Figure 2: Interface Adapter circuit diagram V3.0sConstructing the BoardThe prototype board may be built using universal PCB with point-to-point wiring. If you want to make your ow

自己动手制造at89c51编程器 （英文）,标签：电路设计,http://www.88dzw.com
Figure 2 shows the circuit diagram of the interface adapter card required for the programming of 20 pin Flash devices.

Figure 2:   Interface Adapter circuit diagram V3.0s

Constructing the Board

The prototype board may be built using universal PCB with point-to-point wiring. If you want to make your own PCB, download the PcbsPgm89v3.zip file which contains the printer files for the HP laser printer or download the PcbsPCX.zip file which contains PCX graphics format pcb files. Figure  3  shows  the  components  layout  of  the programmer pcb.

For printing the PRN files on laser printer run the following command, this will print the all pcb files.

COPY  *.PRN  PRN/B

For the bill of material of the project view the file Pgm89v3PartsList.txt
The schematics and the pcbs of the project were designed using OrCAD softwar

Figure 3:   Components layout of the Programmer PCB V3.0

Software

Pgm89v3.zip  file  is used to run the programmer. This  is a  Windows  program  which  can  be  used  under
Windows 95 & 98. The main screen of the program is shown in figure 4.

Following are the main features of this software,

• Read and Write the Intel Hex File
• Read Chip info
• Clear, Fill & Edit Program Buffer
• Verify with Program Buffer
• Reload current Hex File
• Display Data Checksum
• Program selected Lock Bits & ISP fuse
• Parallel Port Selection LPT1, 2 & 3
    Windows NT/2000/XP

  To use the software with the above operating systems, an i/o port driver is required. There are many freeware
  i/o port drivers are available on the web, the following port driver can be used with the Pgm89 programmer,

   http://www.beyondlogic.org/porttalk/porttalk.htm
   
  Study the web page and the readme file included in the port driver zip file for further information.
  The programmer software uses the following i/o port addresses,

   Lpt1 Port  @ 378H
   Lpt2 Port  @ 278H
   Lpt3 Port  @ 3BCH

   I/O  Port  @ 61H
   I/O  Port  @ 42H & 43H
   

  Note:

  In  order to  insure safe  insertion  &  removal  of  the  u-controller from  programmer ZIF  socket  make  sure programmer power supply is turned on before starting the program and the red LED D1 must be  turned  off when the program is started. The u-controller should be placed or removed from the ZIF socket when the red LED D1 is off.
  Also  note  that  the  software  does  not  provide  the  erase  command  because  this  function  is  performed automatically during device programming. If you are required to erase the controller first  use  the  clear  buffer command in edit menu then program the controller, this will erase the controller memory.
   

  

  Figure 4:   Main screen of the program PGM89v3

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