hi to the correspondent..
I am trying to dump a sample program into my p-89c51-rd2-hxx..
I hav used a simple SPI circuit (using a max232) to program it for the first time.
I hav connected only the EA/Vpp pin to high, thats al..
It was very well done..
and i could chek the o/p in the terminal window of the flash magic.
but when i want to reprogram it, i cudnt..!
"i hav made no changes except pushing the reset button, while trying to reporgram it.."
but, the flash magic displays "the device cannot be programmed at this baud rate, try reducing the baud rate, reset to isp"..
i donno wat does this mean...
but if i use a ready made kit to program the 89c51rd2 (in the kit i had a prog/run switch..which is to be kept at prog mode when u need to program..and when yu need to check the opereation of the controller switch it to run mode)..
but the first time program is working all times, once the power supply is on..
I am trying to dump a sample program into my p-89c51-rd2-hxx..
I hav used a simple SPI circuit (using a max232) to program it for the first time.
I hav connected only the EA/Vpp pin to high, thats al..
It was very well done..
and i could chek the o/p in the terminal window of the flash magic.
but when i want to reprogram it, i cudnt..!
"i hav made no changes except pushing the reset button, while trying to reporgram it.."
but, the flash magic displays "the device cannot be programmed at this baud rate, try reducing the baud rate, reset to isp"..
i donno wat does this mean...
but if i use a ready made kit to program the 89c51rd2 (in the kit i had a prog/run switch..which is to be kept at prog mode when u need to program..and when yu need to check the opereation of the controller switch it to run mode)..
but the first time program is working all times, once the power supply is on..