Comments on: RS232 emulates I2C for 24cXX memory programming

By: Tash

Tash — Sun, 20 Mar 2011 09:35:12 +0000

My programer didn’t work

On RS232 pins out voltages are:
Pin1 0,15V ; Pin2 0,15V ; Pin3 -11,05V ; Pin4 -11,05V ; Pin5 GND ; Pin6 0,15V ; Pin7 -11,05V;
Pin8 0,05V

My motherboard is ASRock P4i4D+

By: Kenfight

Kenfight — Tue, 28 Sep 2010 21:57:30 +0000

Problem semi solved.

I am using PonyProg with the above schematics using the following definitions:

-I/O Port Setup -> Serial -> SI Prog API (COM Port.
-None signal is inverted.
-The rest definitions are default.

I also tried WinPic800 without any luck.

Any trouble just ask. =)

By: Kenfight

Kenfight — Mon, 27 Sep 2010 21:04:24 +0000

Hello, I am having some difficulties on a 24c04 eeprom because I can’t read or write. I just read 00FF.

-I ticked the “Use MCRL as Vcc.

-I am using the JDM programmer on COM2 (I tested Direct I/O and Windows API).

-I enabled NT/2000/XP driver and I am running icprog in Windows XP SP3.

-I tested all signals DataIn/DataOut, Clock, MCRL and Vcc. When I tick each test, the signal is running around 4.8V.

Thanks

By: made ariartha

made ariartha — Mon, 06 Sep 2010 10:33:27 +0000

can write, but take to loooooooong time, do you have another schem

By: SIFE

SIFE — Wed, 25 Aug 2010 16:40:04 +0000

is it working with 25Cxx family or i have to use another schematics ,if so where can i get it ?

By: chef

chef — Mon, 19 Jul 2010 15:39:11 +0000

Yes, you can also use the 4.7k resistors!
It also works with ponyprog – it fails at \probe\ button, but it works – tested with a 24c32.

By: Arup Basak

Arup Basak — Tue, 06 Jul 2010 18:38:50 +0000

What about the 5K resistors? Can I use 4.7K ones ?

By: martins

martins — Mon, 05 Jul 2010 06:35:43 +0000

u can use LM7805 in any application where 78Lhas same function as the latter,only that it can take more current which is desirable when u have a large load to be drive.the problem is that it will sink more current from your source and your batteries can run down quickly

By: Arup Basak

Arup Basak — Sun, 04 Jul 2010 15:14:27 +0000

I do not have 78L05(100ma 5volt regulator) but I have LM7805(1A 5volt regulator). Can I use that? also, 5K is not a standard resistance, can I use 4.7Kilo-ohm or I have to parallel two 10Kilo-ohm resistors. Email me qiuckly at arupbsk AT gmail DOT com . Thanks

By: erwin marquez

erwin marquez — Fri, 23 Oct 2009 07:45:49 +0000

can read but can’t write the device,help