VERY URGENT About ST72C314J4B6 ISP Problem???!!!

[huaer2000]

Posted on September 23, 2004 at 14:32

VERY URGENT About ST72C314J4B6 ISP Problem???!!!

[huaer2000]

Posted on September 23, 2004 at 08:06

Dear sir,

I have programmed ST72C314J4B6 with readout protect set. Now I want to know if I can reprogrammed ST72C314J4B6 with ISP method? I am urgent

about this. hope anyone know can help me. Thanks a lot!!!!!

Best Regards,

Mcuinterest

[huaer2000]

Posted on September 23, 2004 at 08:08

Sorry I forgot to tell you the tools I use is ST7MDT2-DVP2. Thanks.

Mcuinterest

[sjo]

Posted on September 23, 2004 at 09:12

Just clear the readout protection in the option bytes and the device will automatically be erased, ready for reprograming.

Regards

sjo

[huaer2000]

Posted on September 23, 2004 at 13:36

Dear sjo,

But very strange. when I do like you describe. There is an error message like belows:

Hardware configuration set to .

Blank check before programming (when available) is OFF

Verify after programming is ON.

Clear memory before loading a file is ON.

Erase device memory before programming (when available) is OFF

Display a popup window when an error occurs is ON.

Log activity is OFF

> Programming PROGRAM MEMORY area...

Error : Error while reading Option Byte

Error : < PROGRAM MEMORY programming failed.

I don't konw what's the reason. Could you help me to analyze?

Best Regards,

Mcuinterest

[sjo]

Posted on September 23, 2004 at 14:32

A common problem with the older CFlash parts was that if the option bytes became corrupt due to a programming failure the device does not run.

The solution is to supply an external clock to the OSC1 pin as per the newer flash parts.

This will enable the device to run and hopefully recover the option bytes.

Regards

sjo