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Flash Magic Forum

Archive => Old Topics => Topic started by: Tong Zhu on August 06, 2003, 07:32:11 PM

Title: Help me!
Post by: Tong Zhu on August 06, 2003, 07:32:11 PM
I have P89C51RD2BA.First time,I use Flash Magic,it's OK.But I use it again,it promtps: "Unable to read the security bits and clocks bit.
Title: Re: Help me!
Post by: Andy Ayre on August 07, 2003, 08:49:57 AM
After trying to use Flash Magic and failing, put the device into the parallel programmer and read the value of the Boot Vector. It should be FCH. If it isn't then for some reason the Boot Vector is being corrupted. Please Email me for further assistance.

Title: Re: Help me!
Post by: Tong Zhu on August 07, 2003, 05:57:07 PM
Sorry,I don't know your email,can you tell me?

I read the value with parallel programmer:Boot Vector is FCH,Status is 00h,Clock is 12x,Sceurity bit is unset.
Title: Re: Help me!
Post by: Andy Ayre on August 08, 2003, 10:25:45 AM
OK. Try this. Download application note 4 from the Flash Magic web page and follow the steps in that document. It will lead you through some things to try. Let me know what you find out. My Email address is at the bottom of all my postings.

Title: Re: Help me!
Post by: Tong Zhu on August 09, 2003, 01:31:19 AM
I have emailed the debug file to you.Thank you!
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