P89V51RB2FN can not erase

Started by nova, September 01, 2006, 08:41:40 PM

Previous topic - Next topic

nova

  I have 2 kind of P89V51RB2FN, one 's label is white, and the other 's label is yellow. With white label kind, I have no problem. But with yellow label kind, I have a big problem: I can not erase Flash Rom. I can use Flash Magic to download program at the first time and it work properly (because at the first time, all Flash are 0xFF). After that, If I chose erase Flash from ISP menu, the Flash still keep the old value.
  I don't know how is different between two kind of chip have. The white label I had 6 month ago, and the yellow label I have just received them.

duy382135

Andy Ayre

The color of labels doesn't tell me anything. However the numbers and letters printed on the casing of the device does. What do your devices have on them?

Embedded Systems Academy, Inc.
support at esacademy dot com

nova

 The full label is:
 P89V51RB2FN
 FA63-0662
 -zG0628 82

duy382135

Andy Ayre

So the devices that work and the devices that don't have exactly the same letters and number printed on them? No differences?

Embedded Systems Academy, Inc.
support at esacademy dot com

nova

 The full label of the device work well is:
P89V51RB2FN
FA 460260
-Z 0442 B2

 And the device that don't work (can't erase normally) have the label:
P89V51RB2FN
FA63-0662
-zG0628 82

duy382135

Andy Ayre

Thanks. I've forwarded this info to Philips.

Embedded Systems Academy, Inc.
support at esacademy dot com