TMS28F512 - what chip to use in place? (Marelli IAW. 1AP 10)

**VTS_Tibi** · 16th July, 2013, 10:37 PM

Hi Guys,

In the future I will have to tune a few Magneti Marelli IAW 1AP 10 ECU found in the Xsara VTS / 306 GTI6 2.0 16V.

Most of these ECUs come with a TMS28F512 some with an ST28F512, and I also have two which have been remapped previously, using an AT27C010.

I have a Willem GQ-4X to do the job, which can't do the TMS28F512, so I'll have to find a chip to replace this.

What kind of chip could replace this - preferably one which can be rewritten loads of times!?

Thanks,

Tibi

**VTS_Tibi** · 17th July, 2013, 10:14 AM

Any clue about this guys?

**mexanico1971** · 17th July, 2013, 10:31 AM

one time I have found 29f010 in the place of the Tms 28f512 !
on peugeot 106 gti 120cv !
but never try to do the same !
I have some 28fxxx from the ecu I fix, in case of need !
but I found this ones on ebay !

TI TMS28F512 ?12C3FML 64Kx8 Flashable Eeprom | eBay

regards

**VTS_Tibi** · 17th July, 2013, 10:59 AM

Well, I would need an other brand, like ST, as my Willem can't do the TMS

**morgano** · 17th July, 2013, 01:49 PM

Treat it as Intel 28F512 and you will be happy.

**VTS_Tibi** · 23rd July, 2013, 10:01 PM

Originally Posted by morgano

Treat it as Intel 28F512 and you will be happy.

Tried it and no luck unfortunately

**mexanico1971** · 23rd July, 2013, 11:28 PM

some time I have found this one on ebay but not order yet !

CATALYST CAT28F512N 28F512 FLASH MEMORY PLCC32 X 10pcs | eBay

what willem do you have ?!

PCB or the one in the BOX fancy ?!

**VTS_Tibi** · 24th July, 2013, 08:57 AM

Originally Posted by mexanico1971

some time I have found this one on ebay but not order yet !

CATALYST CAT28F512N 28F512 FLASH MEMORY PLCC32 X 10pcs | eBay

what willem do you have ?!

PCB or the one in the BOX fancy ?!

The GQ-4X (the one already made with the white box)

**mexanico1971** · 24th July, 2013, 01:32 PM

hum !
I use the PCB 3.5 version !
sorry ! do not know how to help more !

regards

**gzk** · 24th July, 2013, 04:43 PM

gq4X work 100% with 28F512 any brand
you can use any 28F512 or 27C010 or 27C1001 , or 29F010 or 29F1001 or 27C512 you have the choice
please be sure your gq4X is up to date check newer soft .

on gq4X soft try with other 28F512 and check your adapter contact

**easytech** · 24th July, 2013, 11:47 PM

You can't replace a 28Fxx by any 27cXX eprom the pinout is different.
You can use a 29F010 for 28F512 by connecting pin 2 and 3 togheter and program 29F 2x with the same file.

Be sure to use a proper 32p PLCC to 32pin DIP adapter to read/write the 28F512.

**kennfeld** · 25th July, 2013, 12:09 AM

i did lots with 29F010 never got problem

the other i do them all over obd ... with the spi system

**gzk** · 25th July, 2013, 03:57 PM

Originally Posted by easytech

You can't replace a 28Fxx by any 27cXX eprom the pinout is different.
You can use a 29F010 for 28F512 by connecting pin 2 and 3 togheter and program 29F 2x with the same file.

Be sure to use a proper 32p PLCC to 32pin DIP adapter to read/write the 28F512.

Sorry but you wrong .
what i have write is from my personnal experience on peugeot and citroen old ecu and msa15 tdi ecu .

is not write i have read or heard by another one , so i can certified 100% that it work ,

**Zmann** · 26th July, 2013, 01:18 AM

Originally Posted by gzk

you can use any 28F512 or 27C010 or 27C1001 , or 29F010 or 29F1001 or 27C512 you have the choice

Originally Posted by easytech

You can't replace a 28Fxx by any 27cXX eprom the pinout is different.
Be sure to use a proper 32p PLCC to 32pin DIP adapter to read/write the 28F512.

Originally Posted by gzk

Sorry but you wrong .
what i have write is from my personnal experience on peugeot and citroen old ecu and msa15 tdi ecu .

is not write i have read or heard by another one , so i can certified 100% that it work ,

To replace 28F512 with 27C010 or 27C1001 (and 29Fxxx) are possible BUT NOT with 27C512

**easytech** · 26th July, 2013, 09:33 AM

@Kennfeld
I find it hard to believe you can flash the 1AP10 by OBD with a 29F010 flash.
The 29F010 has 5v programming voltage and the 28F512 12.5v.
I made this mistake myself 1 time and also blown an OLS300 emulator in the past.

And yes indeed 27c010 should also be working.
I should even be possible to program it in circuit but never tried.