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View Full Version : How do I read MCU NEC uPD 780xxx with UPA ?


alfabit
20th January, 2011, 07:16 PM
As I said in the title, I want to read PROM inside MCU NEC uPD780xxx ( 828,973 etc ).
Reading with ETL programmer is very nasty, 14 connections, pins from MCU unsoldered and so on.
All I know is it the possibility to connect by 4 or 5 wires to upa.
Can you give me some hints, sw used, is it necessary a script for that MCU ? ....
Any help would be much appreciated.
newgeniehex
20th January, 2011, 07:43 PM
As I said in the title, I want to read PROM inside MCU NEC uPD780xxx ( 828,973 etc ).
Reading with ETL programmer is very nasty, 14 connections, pins from MCU unsoldered and so on.
All I know is it the possibility to connect by 4 or 5 wires to upa.
Can you give me some hints, sw used, is it necessary a script for that MCU ? ....
Any help would be much appreciated.
HELLO
for read this mcu nec you must to soldering 14 wire to the mcu ,4 or 5 wire is imposible for read , you can find the good connection whit clic to help and contend when you open the software upa usb programmer and for read it you must to have the 78K0/HC912 Adapter for UUSP
regard
alfabit
20th January, 2011, 07:55 PM
HELLO
for read this mcu nec you must to soldering 14 wire to the mcu ,4 or 5 wire is imposible for read , you can find the good connection whit clic to help and contend when you open the software upa usb programmer and for read it you must to have the 78K0/HC912 Adapter for UUSP
regard

I think it would be simpler with UPA, 14 wires are used also for ETL programmer. MCU NEC has pins Tx, Rx, and so on for connecting directly to UPA pinouts I think, the sw will do the rest.
The 14 wires solution I know it, and that is I want to avoid.
alfabit
21st January, 2011, 09:36 AM
Look, I have a dashboard with uPD780828 and on this dashboard there are pads for a connector linked to:

1. pin 40 MCU RESET
2. pin 14 MCU Vpp
3. pin 37 MCU RxD
4. pin 36 MCU TxD
5 pin 17 MCU Vss ( GND )

This is for sure to connect to UPA prog, for reading
internal prom, not with 14 wires and/or desoldering the MCU .
The only problem I have is finding a script for MCU uPD780xxx .
It`s only that I `m asking you, a simple script, if you have one.
alfabit
23rd January, 2011, 02:10 PM
Yes, I found the answer.
There is a method to program in-circuit such NEC uPD780xxx, linking 3 wires between the MCU and of course Vpp and Vss.
I let you the pleasure to find by your own this solution and what programmer would do that.
I must thank to all who helped me in my research !
sl4ck
24th January, 2011, 10:23 PM
WTF?! You came here asking for help, no one could help you, now you found the solution and don?t share?

I'm sorry if i understand wrong, but that's the ideia i take from your last post...
alfabit
25th January, 2011, 10:37 AM
WTF?! You came here asking for help, no one could help you, now you found the solution and don?t share?

I'm sorry if i understand wrong, but that's the ideia i take from your last post...

Read the datasheet of uPD780xxx and you`ll find the answer.
The pleasure is yours, my friend !