Help with EEPROM reading needed - GSM-Forum

ChM · 12-31-2000, 09:12

Hi all,
I've tried to make a backup copy of EEPROM in my Nokia 5110 v 05.29 and I wasn't success

Please correct me if I'm wrong:
I disassembled phone (front cover&keys, then 4 screws from the back, white peace with speaker) and EEPROM chip is located in left upon display (looking normaly to phone). It's only one IC which has 8 pins (and - it has shorted 4 pins on upper side of IC, therefore I think it's 24C16).
And then I'd connect Ponny SI API I2C (schema is on ponnyprog www and I verified it on some 24C16) directly to the pins on board solded EEPROM. First I've tried to measure pin 8 if it has proper voltage when phone is on. It was near 3.75V (battery wasn't full charged) so I jugged that pinout of 24C16 is:
4 3 2 1
_______
_______
5 6 7 8

(still looking "normaly" to disassembled phone)

I've tried to run ponnyprog and read EEPROM but it tells "device not responding". Then I'd tried to connect external power of 4V to pin 8 of 24C16 but still "device not responding"

May be I have bad scheme for EEPROM reading, I've no idea if my scheme supports in-circuit connection of 24C16, can anyone help me?
I don't wanna destroy my phone while playing with unlocking, so I badly need backup....

P.S.: May be someone will gimme advice to desolder EEPROM and then read it. But it looks very hard to desolder it and also IC chip hasn't any mark of pin layout - it's very small to make my own and how should I recognize then pinout?

P.P.S: My phone is still working after all I did with its

subzero · 01-01-2001, 03:13

Hello, I have the same problem but i'm trying to read 24c256 to no avail, because its says "device not responding". I'm using the PONYPROG SI v.2.2 with I2C Bus Adapter. I just bought it thru lancos. I think this hardware interface has a problem or error. Anybody who can help us?

01-01-2001, 10:28

Hello
PonyPro funkcional full only on parallel \LPT\ ports with adapter "Easy I2CBus" and external +v. Tested 16-512. If this not work for you must wiev and corect your ponyprog.ini in directory PonyProg.

lotfi17 · 01-01-2001, 13:38

I suggess that you bay a very simple eeprom
reader writer wich you can find allmost every
where in net, I use my old ludipio eeprom and
pic reader it cost around 40-50$, just search
like:eeprom reader. Anyway I know that the pinout of the 24cXX (nokia 61xx 24c64) are
like this: back side

ground <---1- -8- Vcc

ground <---2- -7- NC

ground <---3- -6- Scl

ground <---4- -5- Sda

Use any version of ponyprog, I use old version it works with less problems for both
Com and Lpt ports, and experienced that ponyprog works as well on com ports.

Regards.

[This message has been edited by lotfi17 (edited 01 January 2001).]

ChM · 01-01-2001, 16:28

At first I must say that my interface *works*. I've tried it on new 24C16 eeprom which I was buy. But it wasn't connected to the circuit, therefore I'm asking. When I connect my interface to the phone it doesn't worked for me.

lotfi17: some time ago I was used ludipipo interface to read some eeproms, but now I though that it's better to use ponnyprog interface. But OK, if I understand well ludipipo is working with eeproms connected in circuits for you. I'll try it.
But I also fear that when I connect power to eeprom solded in phone I'll damage the phone. Phone has 3.6V battery and all eeprom readers has power about 5V. What about this? Is it safe to connect 5V to the eeprom on the board?

ARS · 01-01-2001, 22:14

Try to desolder pin 5,6 of eeprom and conect the programer.

rainbow · 01-02-2001, 00:37

Hello, is it safe to use 5v ext. power on at24c256. i'm using the serial interface of ponyprog si. and also I already desolder the eeprom from the fone but when I read it say Device not connected. what does it mean? My computer is a 733mhz P3. does this make any difference? thanks

ChM · 01-02-2001, 18:16

ARS: it's very hard to desolder this small piece of ****! But it's more harder to sold it back!

All: Is it really safe to use 5V power for reading de-solded eeprom?! Phone is using 3.3V technology, I'm not sure...

baypierre · 01-02-2001, 19:11

100% safe for these 24CXX.
sometime you'll need to dessolder pin 5 and/or pin 6 , when you get " device not responding".
You must ensure that you have ~5V at pin 8, if not , dessolder pin 8 too.
1|[]----|8--->to vcc=5v
2| |7--->to GND
3| |6
4|______|5

bone · 01-02-2001, 20:47

Hi,
I always desoldered all pins of 24Cxxx to
read and repair content, and always
successfully.
100%
br,
bone

Quote:

Originally posted by baypierre:
100% safe for these 24CXX.
sometime you'll need to dessolder pin 5 and/or pin 6 , when you get " device not responding".

ARS · 01-02-2001, 21:40

Is not problem to desolder/solder eeprom. You just need the right tools and some experience. You can try it on another ICs from totaly death phones. I ever desolder eeprom from phone and i use too 5 volt power suply.

subzero · 01-03-2001, 14:08

Hi Baypierre,
Just want to clarify.
desolder the eeprom from the fone, connect pin 4 to pin 4 of the reader (ground)
pin 5 to pin 5 of the reader
pin 6 to pin 6 of the reader
pin 7 to pin 1-4 of the reader (ground)
pin 8 to Vcc 5v
and read

12-31-2000, 09:12	#1 (permalink)
ChM Insane Poster Join Date: May 2000 Location: CZ Posts: 68 Member: 1326 Status: Offline Thanks Meter: 0	Help with EEPROM reading needed Hi all, I've tried to make a backup copy of EEPROM in my Nokia 5110 v 05.29 and I wasn't success Please correct me if I'm wrong: I disassembled phone (front cover&keys, then 4 screws from the back, white peace with speaker) and EEPROM chip is located in left upon display (looking normaly to phone). It's only one IC which has 8 pins (and - it has shorted 4 pins on upper side of IC, therefore I think it's 24C16). And then I'd connect Ponny SI API I2C (schema is on ponnyprog www and I verified it on some 24C16) directly to the pins on board solded EEPROM. First I've tried to measure pin 8 if it has proper voltage when phone is on. It was near 3.75V (battery wasn't full charged) so I jugged that pinout of 24C16 is: 4 3 2 1 _______ _______ 5 6 7 8 (still looking "normaly" to disassembled phone) I've tried to run ponnyprog and read EEPROM but it tells "device not responding". Then I'd tried to connect external power of 4V to pin 8 of 24C16 but still "device not responding" May be I have bad scheme for EEPROM reading, I've no idea if my scheme supports in-circuit connection of 24C16, can anyone help me? I don't wanna destroy my phone while playing with unlocking, so I badly need backup.... P.S.: May be someone will gimme advice to desolder EEPROM and then read it. But it looks very hard to desolder it and also IC chip hasn't any mark of pin layout - it's very small to make my own and how should I recognize then pinout? P.P.S: My phone is still working after all I did with its

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01-01-2001, 03:13	#2 (permalink)
subzero Junior Member Join Date: Dec 2000 Posts: 7 Member: 2769 Status: Offline Thanks Meter: 0	Hello, I have the same problem but i'm trying to read 24c256 to no avail, because its says "device not responding". I'm using the PONYPROG SI v.2.2 with I2C Bus Adapter. I just bought it thru lancos. I think this hardware interface has a problem or error. Anybody who can help us?

01-01-2001, 10:28	#3 (permalink)
Josif&R Guest Posts: n/a Member:	Hello PonyPro funkcional full only on parallel \LPT\ ports with adapter "Easy I2CBus" and external +v. Tested 16-512. If this not work for you must wiev and corect your ponyprog.ini in directory PonyProg.

01-01-2001, 13:38	#4 (permalink)
lotfi17 Freak Poster Join Date: Nov 2000 Location: Oslo Posts: 124 Member: 2616 Status: Offline Thanks Meter: 6	I suggess that you bay a very simple eeprom reader writer wich you can find allmost every where in net, I use my old ludipio eeprom and pic reader it cost around 40-50$, just search like:eeprom reader. Anyway I know that the pinout of the 24cXX (nokia 61xx 24c64) are like this: back side ground <---1- -8- Vcc ground <---2- -7- NC ground <---3- -6- Scl ground <---4- -5- Sda Use any version of ponyprog, I use old version it works with less problems for both Com and Lpt ports, and experienced that ponyprog works as well on com ports. Regards. [This message has been edited by lotfi17 (edited 01 January 2001).]

01-01-2001, 16:28	#5 (permalink)
ChM Insane Poster Join Date: May 2000 Location: CZ Posts: 68 Member: 1326 Status: Offline Thanks Meter: 0	At first I must say that my interface works. I've tried it on new 24C16 eeprom which I was buy. But it wasn't connected to the circuit, therefore I'm asking. When I connect my interface to the phone it doesn't worked for me. lotfi17: some time ago I was used ludipipo interface to read some eeproms, but now I though that it's better to use ponnyprog interface. But OK, if I understand well ludipipo is working with eeproms connected in circuits for you. I'll try it. But I also fear that when I connect power to eeprom solded in phone I'll damage the phone. Phone has 3.6V battery and all eeprom readers has power about 5V. What about this? Is it safe to connect 5V to the eeprom on the board?

01-01-2001, 22:14	#6 (permalink)
ARS No Life Poster Join Date: Dec 2000 Location: Slovakia, Brezno Posts: 980 Member: 2721 Status: Offline Thanks Meter: 23	Try to desolder pin 5,6 of eeprom and conect the programer.

01-02-2001, 00:37	#7 (permalink)
rainbow Junior Member Join Date: Jun 2000 Location: cebu Posts: 11 Member: 1551 Status: Offline Thanks Meter: 0	Hello, is it safe to use 5v ext. power on at24c256. i'm using the serial interface of ponyprog si. and also I already desolder the eeprom from the fone but when I read it say Device not connected. what does it mean? My computer is a 733mhz P3. does this make any difference? thanks

01-02-2001, 18:16	#8 (permalink)
ChM Insane Poster Join Date: May 2000 Location: CZ Posts: 68 Member: 1326 Status: Offline Thanks Meter: 0	ARS: it's very hard to desolder this small piece of ****! But it's more harder to sold it back! All: Is it really safe to use 5V power for reading de-solded eeprom?! Phone is using 3.3V technology, I'm not sure...

01-02-2001, 19:11	#9 (permalink)
baypierre Freak Poster Join Date: Jul 1999 Location: Burkina-Faso Posts: 111 Member: 318 Status: Offline Thanks Meter: 0	100% safe for these 24CXX. sometime you'll need to dessolder pin 5 and/or pin 6 , when you get " device not responding". You must ensure that you have ~5V at pin 8, if not , dessolder pin 8 too. 1\|[]----\|8--->to vcc=5v 2\| \|7--->to GND 3\| \|6 4\|______\|5

01-02-2001, 21:40	#11 (permalink)
ARS No Life Poster Join Date: Dec 2000 Location: Slovakia, Brezno Posts: 980 Member: 2721 Status: Offline Thanks Meter: 23	Is not problem to desolder/solder eeprom. You just need the right tools and some experience. You can try it on another ICs from totaly death phones. I ever desolder eeprom from phone and i use too 5 volt power suply.

01-03-2001, 14:08	#12 (permalink)
subzero Junior Member Join Date: Dec 2000 Posts: 7 Member: 2769 Status: Offline Thanks Meter: 0	Hi Baypierre, Just want to clarify. desolder the eeprom from the fone, connect pin 4 to pin 4 of the reader (ground) pin 5 to pin 5 of the reader pin 6 to pin 6 of the reader pin 7 to pin 1-4 of the reader (ground) pin 8 to Vcc 5v and read