51测试网 HPPT://a51.diy.163.com
单片机入门
89c51xp版开发套件......自己动手成就未来
|
ATMEL 89 Series Flash
Microcontroller Programmer Ver 3.0
IntroductionThis programmer was designed in view of
to be flexible, economical and easy to built, the programmer hardware
utilizes the standard TTL series parts and
no special components are used. The programmer is interfaced with the PC
parallel port and there is no special requirement for the PC
parallel port, so the older computers can also be used with this
programmer.
Supported DevicesThe programmer software
supports the following Atmel devices
AT89C51 |
AT89S51 |
AT89C51RC |
AT89C1051U |
AT89C52 |
AT89S52 |
AT89C55WD |
AT89C2051 |
AT89C55 |
AT89S53 |
AT89S8252 |
AT89C4051 |
Note: For 20 pin devices a simple interface adapter is
required.
HardwareFigure 1 shows the circuit
diagram of the Flash Programmer, the programmer is
interfaced with the standard parallel port of the PC.
As shown in the diagram U2 is used to control the data flow
between the controller and the PC, U4 latched the low
order address byte and U5 latched the high order address
byte, while U3 is used to generate the control signals for micro
controller to be programmed. IC U1 is used
to generate the progrram pulse for the u-controller.
The power supply section uses U8 to generate the logic 5V supply while
the U7 is used to provide the programming
supply voltage to controller. IC U6 is used to
generate the VDD power supply voltage for the u-controller which is
selectable either 5v or 6v5.
The power to the circuit is
provided by a wall adapter of 15 to 18V output, normally a
15V type adapter will provide a 19~20V output
voltage. As shown in the diagram the crystal X1 can be
replaced by a resonator in that case capacitors C4 and C5 are not
required. Place a small heatsink on U8 voltage regulator.
For the adjustment of P1, P2 and P3 use a digital multimeter &
follow the steps shown below,
1. To adjust P1, temporarily connect T1 base to ground using
test clips then adjust P1 to get 6.5V at the
output of regulator U6. 2. Next first adjust P2 to get the
13.1V at the output of regulator U7, make sure transistor T5 is off
or temporarily connect the T5 base to ground
using test clips. 3. Now temporarily short the collector of
transistor T5 to ground using test clips. 3. Adjust P3 to get
the 12.1V at the output of U7 regulator IC.
Figure 1: Circuit Diagram of Flash
Programmer V3.0
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 BoardThe 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
software.

Figure 3: Components layout of the
Programmer PCB V3.0
SoftwarePgm89v3.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,
|