AT89LP2052 / AT89LP4052 Eval / ISP development Board V1


This AT89LP2052 / AT89LP4052  Version 1 microcontroller evaluation / ISP development board has several features:

- serial Port with Maxim 232 for serial communication
- 2 Pinheads for Port 1 and Port 3,  Reset connector
- ISP programmable via serial port with SS Signal support
- 7805 / 78L05 regulator
- Atmel compatible AT89ISP Pinheader or use integrated Serial-ISP interface for programming
- This Board can be used for Flash programming with GMS Flash Software via RS232
- Easy IDE: upload your program via ser. Port (no additional Programmer needed) and start the device
Complete use of the SPI Port is possible because the integrated Serial-SPI inteface can be disabled (tri stated) via serial Port. Only one Jumper might be set to disable the On Board Serial-ISP interface if the microcontroller program needs to communicate via Serial Port after programming when the host Software is using the RTS signal.
- Optional (parts not mounted)
   DA converter with MAX538X, I2C programmable
   IRF FET Driver / parts for PWM with Elliptecmotor
   connector for optical encoders, INT 0 or INT1 interrupt support

With this board you can test the Atmel LP microcontoller and learn more about the LP2052/4052 PWM functions SPI or I2C Programming. The In Sytem Programming allows you to download your programming code via Serial port and to restart the microcontroller. 

If you need the additional functions (e.g. Maxim DA converter, ISP Programming, FET driver, optical encoder) then add the devices for your requirement or expand this basic pcb with your own hardware mounted on the pinheads. 

As Atmel states on their hompage: Your designs will give your more than you expected...

You can find more details about the microcontroller in the Atmel specifications: (
Atmel specs ).


A picture of final version with reduced parts for 5V regulator (78L05), serial communication (Max232), ISP Pinhead for programming and 11.052Mhz Crystal.
If you just order an empty PCB you will get the schematics and part list for this min. configuration.


Programmer Software
Programming the Flash through serial Port  is controlled by GMS software running on the host. The software supports writing the flash memory (hex files), Lock bits and user fuses in SPI /ISP programming mode. The software can handle the RST and SPI signals of the microcontroller. The user must set one jumper to program the non volatile Flash code memory of the device. Programming mode ist displayed with one additional  LED.
You'll find severals software examples for this design in the near future.

This PCB also supports Atmel compatible ISP header. That means that you can use the Atmel ISP Programming Software ATMELISP.

Questions ?
Any input is welcome: Mail