Hello,
I have a couple of questions about programming a microcontroller through the serial port. I am wanting to know if the particular uC is what allows me to program it without a commercial programmer, or if the 8051 type of uC is what allows this, or if any uC can be programmed from a circuit using NOR gates and a transceiver. Here are the components I am referencing to:
Phillips P89LPC925 8051 uC
Phillips 74HCT02N Quad 2-input NOR gate
Linear Tech LTC1385CN 3.3v Low Power EIA/TIA-562 Tranceiver
I have attached the photo of the schematic that was/is going to be used(old project from college) There is one correction on this on pin 1 of the transceiver, you can see the scribble out of a deleted connection and a drawn in connection to pin 21 of the uC. Is this an ICP? Page 86 of 105 in the uC datasheet references this, but yields no schematic to make it work.
Here is the <a href=http://www.keil.com/dd/chip/3704.htm> link </a> to the webpage years ago. The schematic in the picture I think might be the MCB900 board; I am not sure but its with the project/datasheets that we followed. We used Flash Magic to compile and Keil to transmit if I remember correctly. I found another diagram while trying to google this question <a href=http://www.flashmagictool.com/assets/resources/LPC_PGM2_public.pdf>here</a>.
Please let me know if you need any more information. The sad part is that my computer no longer has a serial port in the back. Would it be possibly to easily modify this to USB interface?
Thank you,
Unteddybear
PS. This is a fairly easy to make programmer. Do all/most uC have a way to program them like this?(easy, no costly programmer).
edit: apparently I have forgotten how to post links
I have a couple of questions about programming a microcontroller through the serial port. I am wanting to know if the particular uC is what allows me to program it without a commercial programmer, or if the 8051 type of uC is what allows this, or if any uC can be programmed from a circuit using NOR gates and a transceiver. Here are the components I am referencing to:
Phillips P89LPC925 8051 uC
Phillips 74HCT02N Quad 2-input NOR gate
Linear Tech LTC1385CN 3.3v Low Power EIA/TIA-562 Tranceiver
I have attached the photo of the schematic that was/is going to be used(old project from college) There is one correction on this on pin 1 of the transceiver, you can see the scribble out of a deleted connection and a drawn in connection to pin 21 of the uC. Is this an ICP? Page 86 of 105 in the uC datasheet references this, but yields no schematic to make it work.
Here is the <a href=http://www.keil.com/dd/chip/3704.htm> link </a> to the webpage years ago. The schematic in the picture I think might be the MCB900 board; I am not sure but its with the project/datasheets that we followed. We used Flash Magic to compile and Keil to transmit if I remember correctly. I found another diagram while trying to google this question <a href=http://www.flashmagictool.com/assets/resources/LPC_PGM2_public.pdf>here</a>.
Please let me know if you need any more information. The sad part is that my computer no longer has a serial port in the back. Would it be possibly to easily modify this to USB interface?
Thank you,
Unteddybear
PS. This is a fairly easy to make programmer. Do all/most uC have a way to program them like this?(easy, no costly programmer).
edit: apparently I have forgotten how to post links
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