Messages

which pin of LPC2378 should be connected with DB-9 connector.

none, or you will have to go buy a new chip. You need a MAX232 (equivalent)

Erik

1) wrong forum
2) look at P89LPC9xx

Erik

[Best]

Yes, it should work. Connect the UART of the device to a PC COM port via a MAX232 or similar. Best to use a real COM port rather than a USB cable.

Best?
many cases of non-working download when using a USB cable have been reported.\
The sad case is that many USB cables a "only what is needed"

Erik

As long as the problem isn't fixed by software the only thing you can do is to try a number of chips in the ICP-bridge until you find one with a little faster oscillator. Then echoing is faster than receiving and your programming works.

what about just writing the TRIM

Erik

[with a working bootloader]

Thanks for the prompt reply. Just to confirm. Is the combination of EMP900, PAB900 and keil microvision not able to reprogram a working copy of the isp bootloader? If so, would the parallel programmer be necessary or is it possible to use my existing system?

THINK!

how can you install the bootloader with the bootloader once it is blown.

in some cases (I do not know about your chip) it is possible to load a 'substitute bootloader' in code memory with a working bootloader to replace the bootloader, but that, of course, requires that the original bootloader works to install the 'substitute bootloader'

yes, you can program the bootloader with a parallel programmer.

Erik

no better plae to start than "the '51 bible"
Chapter 1 - 80C51 Family Architecture:
http://www.nxp.com/acrobat_download/various/80C51_FAM_ARCH_1.pdf

Chapter 2 - 80C51 Family Programmer's Guide and Instruction Set:
http://www.nxp.com/acrobat_download/various/80C51_FAM_PROG_GUIDE_1.pdf

Chapter 3 - 80C51 Family Hardware Description:
http://www.nxp.com/acrobat_download/various/80C51_FAM_HARDWARE_1.pdf

what good would that do?
how do you propose to make a Windows PC spit out 'non-standard baudrates'

Erik

sticking my finger in unknown territory so, please take this with a grain of salt

have I not seen posts abou different IDs for the 'V' chip due to a change of the parallel programming algorithm?

Erik

the good parts were purchased from Avnet, and the bad ones from PartMiner.

just a thought, are you erasing the 'protect bits'  before attempting to program? It could be that you have used, but good, chips that just happen to have the protect bits set.

Erik

WHY?

The MCP900 cost (when shopping around) less than it will cost you to make your own.

Erik

[for 'V' chips]

first time (with a "factory fresh" chip) the chip is alredy in ISP mode so whatever you do, it will work.

for 'V' chips, every later time you need to synchronize reset with the ISP.

Erik

[a bootloader and a PC program written by you]

P89V51RD2 has also SPI interface.
Can I build a programmer P89V51RD2 For with SPI interface?
If it is possible then which software I need for Programming P89V51RD2 from LPT port?

sure,
if you do not like the car you drive, but some sheet metal and start bending it.

P89V51RD2 has also SPI interface.
Can I build a programmer P89V51RD2 For with SPI interface?
yes, but why? NXp never intended the SPI interface to be used for programming.

If it is possible then which software I need for Programming P89V51RD2 from LPT port?
a bootloader and a PC program written by you

why are you trying to make a NXP chip behave as an Arghmel chip?

Erik

 The programming and verification seems alright using flash magic but the chip is facing a continuous reset

sounds as if you are in the wrong forum

try www.8052.com

i have some suggestions, but do not want to 'pollute' the FM forum with them

Erik

[that]

" However, ISP reading, writing, for erasing of the user's code can still be performed if the serial number and length has not been programmed ".

Is there any way to keep the software locked and un-readable ??

I guess you answered it yourself.

if you negate the quote you make you get the answer

However, ISP reading, writing, for erasing of the user's code can still not be performed if the serial number and length has not been programmed

Erik

PS
nobody says that you have to use different serial numbers, if no need use the same always (that you can remember )

[no]

I have been looking for other manufacturers and I found that some have new bootloaders similar to this one, but they still keep the hardware ISP entry mode.

I am a great fan of the no hardware ISP entry mode (I created NoTouch for that reason) and think that Philips did very well with the ISP design of the V chips. However that seems not to be the case for some others so NXP had to come out with the VC series that have hardware ISP entry mode.

SO, if you prefer hardware ISP entry mode get a VC chip, they are supposedly identical to the C (non -H) series re ISP.

Erik