Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

code protect!->unprotect_conversion

Status
Not open for further replies.

semetu

Newbie level 6
Newbie level 6
Joined
Mar 11, 2005
Messages
11
Helped
3
Reputation
6
Reaction score
0
Trophy points
1,281
Visit site
Activity points
1,358
I heard something like that

The Pic chip (PIC16C84) can in fact have it's program and data
memory read after the config fuses have been set to code
protection on.
Try the following:
Write some code to the chip with the code protection set to "ON".
Read back to verify that the protection has indeed come on.
Now set Vdd ( pin 14 ) to Vpp-0.5v, (Programming voltage less
0.5V).
Set config fuse to "OFF" and reprogram config fuse.
Now set Vdd back to normal, +5v.
Power off the programmer.
Wait 10 to 20 sec.
Power back on the programmer. (VDD at + 5V)
Read the Pic.... and hey presto, data in unprotected format should
now be available

Is it possible?
 

if you find any thing about my link and try or find something tell me.

h**p://www.break-ic.com/
 

    semetu

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top