Hello,. i am a newbie with ATMEL MCU family,. but i want to change the software on a AT89C wich contains an “HORLOGE 7 segm. Introduction to Programming With AT89C (Guest Starring: Arduino): The (also known as MCS) is an MCU design from the 80’s that remains. This is Linux software for idea from former Silicon studio parallel port programmer for AT89C microcontroller. It is a direct translation of the.

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It’s a pity it can’t run just with a RC-circuit for clock signal generating, and that an OTP version is not available.

AT89C Programmer

A simple programmer for the Atmel AT89c microcontrollers. For progranmer, resident printing programs can do almost anything with the LPT. My objective was to build a simple programmer, that would be easy to make at home and would work without significant problems on the first try.

It is definitely better to use two 8-bit “D” flip-flopswhich are triggered by edge, not by level. Its programmeer is accessible to the software via the P3.

It is completely independent, but it was developed as its component Data reading and verification is controlled by circuit – four multiplexers, allowing to read 8 bits via four parallel port input bits.

Programming modes Pulse widths Timing diagram for programming and verification Practical part: Data protection system is designed very well. It should work with at89c20511 problem on the first try.

This programmer is a part of the LAB system. It still works since Atmels sustain a lot; however, their opinion is included here simply because they are right.


The original design used the circuit; however, its use did not prove to be useful due to the parallel port output design see the article about LPT. Optionally, set verification mode via bits P3.

Current proframmer high or low is determined by the state of the 6Q bit pin 14 of the system latch Set the programming mode via pins P3. Increment address counter by pulsing XTAL1, set next instruction code via P1 Repeat steps 5 to 8 until the 2kB boundary is reached, or until the whole file has been programmed into the chip. This is an outline of the programming algorithm: Both software versions support so-called DEBUG mode, that should greatly simplify any troubleshooting.

If you need more exact specifications, download the original datasheet in. In the first case, it’s not recommended to use the stabilisers; when an input voltage is connected to their outputs, they consume about probrammer mA and convert it to heat. There is no further significant power consumption drop at lower clock frequencies. Instead of waiting 1. We tried to minimize this progfammer in our design; however, there is no way to remove these side effects completely with respect to simplicity.

You can view the modified schematics here.

Tutorial Microcontroller – Theory, Design, Projects, and Programming: Programmer AT89c

Or, “in an emergency”, you can use two standard cheap sockets inserted into each other, so the soldered one is not subject to excessive mechanical stress. Several people have independently pointed out that the voltage switches are not designed in a totally “clean” way.

The circuit is intended for simple applications, where room and number of wires are limited.


Software is written in Pascal, the new version uses the Turbo Vision user interface. We paid great attention to the timing routines, so it should work on any computer.

The only disadvantage of this processor is a small and non-expandable program memory. The at89cc2051 major inovation over standard series processors is the analog comparator on pins P1. April – It connects directly to a PC parallel port. It was designed using common components, with respect to simple construction. With the AT89C51, at892051 is not even possible to transfer contents of the internal FLASH memory if an external memory with a special software is attached to it.

Electronic :: Atmel AT89C2051/4051 Progranmmer

We are working on a reprint. LEDs are used to decrease voltage and to indicate current process. The lowest power consumption can be proogrammer with clock frequency of 2 MHz, and amounts to about 6 mA for the processor itself add 2mA for a miniature Big thanks to the author.

According to our measurements, power consumption averages approximately 12 mA. This is one of the simplest programmers. Due to undefined state of the LPT port after running some applications, it is necessary to turn on the power for the programmer AFTER starting the control software.

In some cases, it’s better to use a different design for the voltage switching part – see the end of this article. Features of the AT89C processor:

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