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EAGLE component library
Simple ATMEL AVR - Programmer
In this project we decide to implement simple ATMEL AVR microcontroller programmer for our hobby electronic purposes. We get ideas for this project from
. All the credits of this project go to them and creator of the ISP Programmer - Adam Dybkowski.
Entire project is based on the 7408 - Quad AND gate chip and it is possible to use any (CMOS/TTL) AND gate chip with this project. During the testing phase we use CD4071 and 7409 quad AND gate chips without any circuit modifications.
During the assembly process make sure to install proper heat-sink to the 7805 voltage regulator.
After constructing the circuit
download and install ISP Programmer
and follow these steps,
Open ISP Programmer software package and press "Setup" button to setup the programmer.
Select "AEC ISP" as a "ISP Cable Pinout" and press OK
Connect MCU to the programmer and power on the programmer
Select MCU type and oscillator (Crystal) frequency from the software
Press "Reset ON" button
Press "Read Signature" button
If the device and programmer is working properly ISP Programmer automatically detects the chip and flash memory configuration from chips signature bytes.
Now specify the hex file to ISP Programmer and press “Erase and Program All” button to start the programming process.
During the testing/usage, some times we got “NOT KNOWN (FF, FF, FF)” as a device signature. If you get this error please check the following,
Programmer is connected to the computer and power on
MCU Crystal configuration
If ISP Programmer still produces an error, problem is in your MCU software. (Especially your MCU software produces output to the MISO and MOSI related ports.) Then disconnect programmer’s RESET connection from MCU and connect MCU’s RESET pin to the ground (0V) and continue your work. (Ignore the programmers RESET terminal)
This simple programmer support wide range of ATMEL ATtiny, ATmega and AT45x, AT89x and AT90x series MCUs.
Project Related Downloads
Complete schematic of Atmel - AVR programmer
CD7408 - Quad two-input AND gate
ISP Programmer - Adam Dybkowski
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