Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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.

Register Log in

code extraction from 89C55

Status
Not open for further replies.

MITSUKO

Member level 2
Joined
Jun 6, 2001
Messages
48
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
340
89c55 code

Hi everybody

Is there a way to extract the code out of a programmed , and most certainly , protected
89C55 . The chip is valuable , and i only have one , so i can't risk losing it .
Is there a safe way ??
 

mm6349

Member level 2
Joined
Aug 8, 2001
Messages
49
Helped
5
Reputation
10
Reaction score
0
Trophy points
1,286
Activity points
255
On 2001-10-05 08:42, MITSUKO wrote:
Hi everybody

Is there a way to extract the code out of a programmed , and most certainly , protected
89C55 . The chip is valuable , and i only have one , so i can't risk losing it .
Is there a safe way ??
I have similar problem that I have the equipment controlled by the Hitachi HD40L4818H which is a mask programmable microcontroller. How I can read the Rom inside the chip. I want to program another chip to replace the old one. Thanks.
 

Trishool

Full Member level 1
Joined
Jul 12, 2001
Messages
97
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Himalayas.(mount K2)
Activity points
825
If you search elektroda you find more ,

BTW provide a long erase pulse with CE high and read one byte at a time ignore the byte and then reset then re read the whole code with CE low There is the protected code he he heeeee
PLEASE dont forget to read a byte before resetting, else you miss the code .This technique is applicable to 89CXX series only.

This clearly means you should do the following:--

1)PLEASE dont flood me with PM's :smile:

2)Read all the data sheet thoroughly.

3)Make yourself a SPECIAL programmer :wink: along with 74ls122 - 123 etc etc.

4)Then experement.

GOOD LUCK
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top