In-System Programming Support > P89V51Rx2/P89LV51Rx2

Flash magic is not erasing 89v51rd2

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Amrita_lv:
I have bought 15 nxp89v51rd2; i am using flash magic (version 7.72) to program it; out of 15 mc only 5 mc got programmed; for rest of the micro controller i am getting the issue; It shows reset the device into isp mode now, then if I press reset, nothing happens. So I thought it as a bootloader problem and I downloaded the bootloader from your site and programmed the micro-controller using TOP Universal programmer; After that I put it back on target board and tried to re-program it, now again it shows "reset the device to isp mode now" and i press reset, it works and goes to "erasing device......" after that nothing happens, it can not erase the device.
So I thought it as a configuration bit issue and used the TOP universal programmer to read the config bit for good microcontroller and non-working microcontroller; I found the working micro controller has following configuration "0x60=22 and 0x61=42"; but the non-working micro controller shows "0x60=0f and 0x61=02".
I need your help to solve the issue

Andy Ayre:
The 0x60 and 0x61 values don't mean anything to us. What do they mean?

Andy

Andy Ayre:
The bootloader is stored in the first 8k of block 1. Please see chapter 7 of the data sheet from NXP which explains this.

Andy

mrsam41:

--- Quote from: Amrita_lv on April 24, 2014, 12:17:23 pm ---I have bought 15 nxp89v51rd2; i am using flash magic (version 7.72) to program it; out of 15 mc only 5 mc got programmed; for rest of the micro controller i am getting the issue; It shows reset the device into isp mode now, then if I press reset, nothing happens. So I thought it as a bootloader problem and I downloaded the bootloader from your site and programmed the micro-controller using TOP Universal programmer; After that I put it back on target board and tried to re-program it, now again it shows "reset the device to isp mode now" and i press reset, it works and goes to "erasing device......" after that nothing happens, it can not erase the device.
So I thought it as a configuration bit issue and used the TOP universal programmer to read the config bit for good microcontroller and non-working microcontroller; I found the working micro controller has following configuration "0x60=22 and 0x61=42"; but the non-working micro controller shows "0x60=0f and 0x61=02".
I need your help to solve the issue

--- End quote ---

Do you find out solution for this problem? if can pls help me how to fix? thank you.

Andy Ayre:
This is probably a question only NXP can answer, but as the parts are out of production it might be difficult.

Why not use a modern device? These parts are not recommended for new projects and it will be difficult to repair/service existing products based on them.

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