Best Answer: The Atmel AT89C51 datasheet (2nd link below) talks about the programming method. The first link below provides a schematic and software. However, it requires you to. Have another processor and a way to load the code into that one.

Hi, I bought an AT89c51 dev. Board from below link. I read some forum about interfacing RS232 with MCU for serial.

So it's a chicken and egg problem of sorts. They do suggest getting an SPI programmable device as the 2nd one and programming that one more easily. Since I have lots of tools for other micros floating about, I'd use one of them and wire up my own thing and write my own code if I wanted to do this myself without buying something. Do take note that both +5V and +12V are required.

Also take note that Atmel doesn't recommend that part for anything new, either. Which gets back to the main suggestion about buying a board. But that also says 'why bother, since the chip isn't recommended anymore and may disappear -- it would be a waste of money to buy a programmer for it.' So, that gets back to why you don't just throw away the chip entirely and get a newer Atmel unit that is supported or else, if you are stuck on 8051 cores, something from Cygnal -- no, that's SiLabs now. The 3rd link provides almost all you need to do it from a PC. It is from Atmel's site. It's another option for you.

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I have this $2 (or less, converted from PHP 100) analog TV box that I opened (because I love opening things and hate putting it back) which happened to have an ATMEL AT89C51 microcontroller. Beside the microcontroller there's this Serial EEPROM (atmel712 24c028). Can I use it?

Not necessarily use the arduino bootloader. How will I reprogram it?

What extra tools will I need (hardware or software)? It also has a tuner that the microcontroller controls and that tuner can transmit and receive. And I guess I have something in mind to do with these. Where will I start?

AVR (8 bit) - Made by Atmel. Uses AVR instruction set. PIC (8 bit) - Made by Microchip. Uses PIC instruction set. 8051 (only 8 bit) - Made by everyone and their uncle. Uses 8051 instruction set, originally by Intel who gave up selling these 15 years ago when they decided anything that didn't net them $50 wasn't worth their time. So we are talking about three different and totally incompatible 8-bit architectures.

Like 6052, Z-80, and 6800. But it doesn't matter so much if you have a C compiler to do the dirty work for you. There is always a way to interface digital ICs, even if they are running at different voltage levels.

But if they are all running at the same voltage, say +5V/0V, it's pretty simple. Logic pin to logic pin connections are just a wire or a trace - no resistors or anything else needed unless you are trying to communicate in multi-megahertz speeds. (you may need a pullup resistor if the output is open-drain, but this is not likely). The only trouble you might have is making your software synchronize things well - that is to make sure the receiving MCU is ready when the transmitting one is transmitting. This can be done with either interrupts or polling. Interrupts are better, but the software gets a little bit more complex.

The 8051 development board can be used as a learners kit as well as a project board. An ISP programmer is required to fuse the HEX file on to the target 40 pin IC (89S 51 or 89S 52). The HEX file is created using KEIL software. See to create HEX file Care should be taken while connecting the ISP programmer with the Development board.Look out for the GND connection printed on the boards. The GND of ISP must match the GND of Development board. Connect the USB cable of ISP programmer to USB port of your PC. No external power is required for the Development board.Power is sourced from USB port of PC.

PROGISP is the software used to load the HEX file on to the target chip. KEIL Microvision is the software to create HEX file using C code or Assembly language. Download the software here: The drivers for the ISP Programmer is found inside the Drivers folder of PROGISP. Open the DEVICE Manager of your PC while connecting the ISP programmer to USB port.If you get an exclamation mark against device, Update driver & browse to the location of Drivers inside PROGISP folder you’ve downloaded. Once the Drivers are installed you get the USBasp under Device manager. The setup is now ready to load the HEX file.

We use the PROGISP application to load the HEX file on to the target IC. No installation is required for this software, it’s a standalone one. Double click progisp.exe to open the application. The PRG ISP & USB ASP buttons should be bright.If it’s greyed out, then check the USB cable connection & the driver installation.

Cara Membuat Antenna Kaleng Untuk Wifi Map. Select the target chip (here 89S 52) from the “Select Chip “ drop down menu. Ensure that following buttons are Enabled: Verify Signature Chip Erase Program Flash Verify Flash If you enable the LOCK CHIP button, others can’t make a copy of your chip. Click on FILE — >LOAD FLASH & browse to the location of the HEX file you’ve created using KEIL.

Once the HEX file is loaded, click on AUTO button to perform the tasks you’ve enabled. The status bar at the bottom indicates the progress of operation. Finally the HEX is successfully loaded on to the target chip. If the PROGRAM FLASH button is not enabled, you get Flash Verify Error while fusing.

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