How to read MC68HC11f1VFN4

[bambula tuner]

Hello Guys

I have a big Problem i try to read a Motorolla MC68HC11F1VFN4. With a UPA Clone V1.2
with no sucess. i Spend more then 10 hours to read it but its impossible for me.

here is a foto how i connect it and one of the ECU Marelli
20130826_223032.jpg20130826_223145.jpg

The UPA Tells Device not respond

and in the connection Window i have a error on MODB PIN
20130826_224834.jpg


here is a FOTO.


Where is my mistep?

How can i Read this MCU?


Please Guys help me!!!!!!!!!!!!



Thanks at all digital Kaos Members!

[andresalvaro16]

Upa has an adapter for HC11F1.

Greetings

[antwnhszr]

desolder from the pvb my friend....and use adapter..

[easytech]

Desolder the 68hc11 or minimal lift reset, boot, RX and TX pins.

[Zmann]

To switch MCU operating mode from operation to boot mode for programmer read/write, HC11 MODA and MODB pins need to pull down from 5v to 0. Theoretically on this case UPA has too weak pull down power on pin6 to MODB pin. On the other hand the circuit has too strong 5v fed to MODB pin. Some possibilities to do

1. lift up the problem pin, MODB
2. try jumping MODB directly to GND and leave UPA pin6 alone
3. remove and read/write on an adapter
4. find the way to increase pull down power to UPA of some pins and stay read/write in circuit as normal

[jp_olli]

When I read this mcu I lift all pins except VDD and VCC. My original UPA just can?t do it in circuit.

[bambula tuner]

Hello guys

Sorry for my late answer i had much work at the Moment.

Thanks for all the answers and all tips.

But i have bad news.

I have try to lift up the modb pin with no work )o;

Then i have try to put the the modb pin with a resistor to ground and leave the pin 6 from the upa disconnectet and also try with connectet, but also not work.

Then i have solder it out and but it in the adapter but then i comes a error of Pin 7 Reset to high.

Now i think something is wrog with my upa clone but eeprom reading writing works without problems i have try a ST95080.

Mabye sombodoy have a dump for the upa?

Thanks

[gwee]

Get etl programmer.

[Zmann]

what adapter? ready adapter for F1? don't know if it exists. Reset high can be a sign of non oscillated xtal. xtal plus a resistor of 10Mohm in parallel? it's a must!

[elephantul]

use this, is simple and work 100% :http://www.digital-kaos.co.uk/forums...inator-222652/

[elecautocr]

For read with UPA only need to lift TxD pin

[bambula tuner]

use this, is simple and work 100% :http://www.digital-kaos.co.uk/forums...inator-222652/

Thank you very much for the link.

It is a photo in downlad Rar archive that is showing power up the ecu extern with 12V+.

Now the problem is solved it work at first try:-) ahhhjeeehhh

I have try another ecu 16x Marelli without desolder the mcu and without lift any pin only connect all pins from upa to the mcu how its showin in the upa manual and power up the ecu extern.

Pin 26 + 35 12v+
And Pin 34 ground it works perfect without any problem;-)

Thank at all guys how helps solve this problem your are all great peopels.

Greetings from switzerland

[meteinam]

can you share picture please

[morgano]

can you share picture please

Guess he refered to this one.