Locking My PIC microcontroller !

Surge

New Member

• Sep 17, 2003

• #1

Hi All ,

I wanna Lock my PIC16F877 completely from outside world read write .I have no external data/ Flash memory I want to keep it for internal Flash only . Please tell me how to do this and which bits should be enabled in the Configuration word of the programmer ?

CP0
CP1
CPD
WRT

I find them confusing in datasheet . I just want to know how to stop any external programmer to read my Flash / Program memory .

Thanks
Surge

 

M

MindShaper

New Member

• Sep 17, 2003

• #2

You should enable the CPD bit, it will protect your code against DeViLs! :lol:

 

T

TKS

New Member

• Sep 17, 2003

• #3

querstion

is it that rue that even you cant enter the chip anymore...??

or just you cant read..????

TKS

 

Surge

New Member

• Sep 17, 2003

• #4

Hello , and what are the other bits for CP0 ,CP1 and WRT ??

Thanks

 

T

TKS

New Member

• Sep 17, 2003

• #5

surge

wy you dont answer to my question...???

TKS

 

kinjalgp

Active Member

• Sep 17, 2003

• #6

is it that rue that even you cant enter the chip anymore...??

or just you cant read..????

TKS

Click to expand...

Once you erase the FLASH, you can use it again. In locked state, you just can't read its contents.

 

Surge

New Member

• Sep 18, 2003

• #7

Guys Attention: Please

Should i set fuse for all these :
CP0
CP1
CPD
WRT

If I do that wont it effect the performance of the chip ,I need only internal memory .

ThanKU

 

kinjalgp

Active Member

• Sep 18, 2003

• #8

Locking won't affect its operation in any ways. It will just prevent the data of flash ROM from going out of the uC by any means and ways.