UPA USB Mask 3K85K

[lwood]

i just receive my new UPA USB, i have not move any jumpers, from upa usb. i am using external power. 12v 1A. this is my first module with UPA USB, its from a 04 Cadillac Escelade with Mask 3K85K = HC908AS60, i get errors when i press the Auto Baud Rate. (See pictures.) the pin out i am using MC68HC08AS20 PLCC52.
also if i don't connect P9-26 VDD, P3-7 PTC3, i get the same error.
on picture i see i get bad on P1-9 IRQ, i try taking off wire and solder back on 3 times.
Help me figure this out

[ledojo]

I dont think you need external V supply--I use just USB power.

I also switch back and forth from 3V to 5V when reading and writing, respectively.

Not sure about the auto baud rate, but that should be okay. Just make sure the program recognizes the device when you plug it in.... Start the program and then plug in the device--it should show up in the log with serial number. If not, then double-check device driver installation.

just click the 'read'

[ledojo]

oh.. just saw the pics... def just use USB power and the jumper is closed for 5V and software is 5V--without external V, you should be good.

edit: just saw the error... an IRQ V err not Vdd... strange one there. double check your soldering. Still, try it without external V.

[credoline]

You must put MCU in Monitor mode, read some manual

[sl4ck]

What do you mean with don?t connect P9-26 VDD, P3-7 PTC3? These two have to be connected to UPA wires.

Almost for sure you don?t need external power supply, let jumper in USB Power, and also jumper in 5V.

Conect all the wires like UPA datasheet say and lift Pin26-VDD from board, after that start software and connections on software (if they are green). If not, lift also Pin7-PTC3.
Restart software again

[sl4ck]

Before you lift VDD and PTC3 lift Pin 10 - Rst and try it, check connections in software.
What can you see? Take a screenshot

Also, ALWAYS hit Auto Baud Rate button before read

[sl4ck]

You may want to read it has MC68HC908AZ60A and use the following security bytes:

$F9-$F1-$F9-$F4-$F9-$F7-$F9-$FA

[lwood]

What do you mean with don?t connect P9-26 VDD, P3-7 PTC3? These two have to be connected to UPA wires.

Almost for sure you don?t need external power supply, let jumper in USB Power, and also jumper in 5V.

Conect all the wires like UPA datasheet say and lift Pin26-VDD from board, after that start software and connections on software (if they are green). If not, lift also Pin7-PTC3.
Restart software again

what i mean is i don't have wires connected to pin 26VDD and pin 7PTC3, i get the same connection message.

[credoline]

Pin 9 on UUSB 9 pin port is +5V (use for Vdd)
MCU pin PTC3 can be on GND (low level) or on +5V (high level state), make difference only in baudrate. ITS NOT in good state if voltage level on that pin is +2,4 V or 0,8V or similar.
When you connect PTC3 to +5V use 1K resistor (not neccessery for MCU but UPA can be damaged if something is internally conected on board)
IN MOST airbags you can read in circuit HC908AS60 (with lifting some pins), in some is possible only when unsolder MCU from board and conect on bench in the same way with adding xtal (4MHz for example).
End of lesson now go and drink

[lwood]

First i try Lift pin 9 IRQ, i got the same connection message as the firts picture i posted.

Then i lift pin 26VDD i get this message irq 0.77v bad (See Picture)


then i lift pin 7PTC3, i get message IRQ 0.79V Bad (see Picture). Keep in mind all three pins are Lift

[lwood]

Pin 9 on UUSB 9 pin port is +5V (use for Vdd)
MCU pin PTC3 can be on GND (low level) or on +5V (high level state), make difference only in baudrate. ITS NOT in good state if voltage level on that pin is +2,4 V or 0,8V or similar.
When you connect PTC3 to +5V use 1K resistor (not neccessery for MCU but UPA can be damaged if something is internally conected on board)
IN MOST airbags you can read in circuit HC908AS60 (with lifting some pins), in some is possible only when unsolder MCU from board and conect on bench in the same way with adding xtal (4MHz for example).
End of lesson now go and drink

Before i do this, Do put all the pins i lift back?
ok. i will try this
i put P9 -pin 9IRQ
then i will Ground Pin 7PTC3.
i will not add 5V to pin 7PTC3 because i don't have a 1k restore .

[credoline]

In UPA 9 pin connector you must have IRQ pin to connect on MCU IRQ pin.
I think UPA pin 1 is IRQ pin

[credoline]

Make connections like this:
UPA: MCU:
1 IRQ
2 PTA0
5 GND
6 PTC0
7 Reset
8 PTC1
9 Vdd

After this check voltage on MCU pins, anyway pull up PTA0 always in airbags, others pins only if voltage not good and reset if UPA can not pull him down to 0v when try to read

[lwood]

Pin 9 on UUSB 9 pin port is +5V (use for Vdd)
MCU pin PTC3 can be on GND (low level) or on +5V (high level state), make difference only in baudrate. ITS NOT in good state if voltage level on that pin is +2,4 V or 0,8V or similar.
When you connect PTC3 to +5V use 1K resistor (not neccessery for MCU but UPA can be damaged if something is internally conected on board)
IN MOST airbags you can read in circuit HC908AS60 (with lifting some pins), in some is possible only when unsolder MCU from board and conect on bench in the same way with adding xtal (4MHz for example).
End of lesson now go and drink

i try this method. first with the three pins lift. then the three pins back in place. i have PTC3 ground ,see picture for errors.

[credoline]

Yes, i see, problem with Reset. Try to lift and try not to lift Reset, other pins do not change.

We can continue conversation in monday, i must go in caffe bar to drink beer, tonight is best night for that.