Read/Write flash from SH79F1619

• Read/Write flash from SH79F1619
  Posted by korisnik_123 on 23 Mar, 2024 14:28
• Greetings,
  
  First of all, disclaimer: I am doing this for the first time, and I don't have experience with this kind of work. So, does anybody know if I can read flash, memory, eeprom, or whatever is needed from the SH79F1619 8051 microcontroller? More precisely, all I need to do is clone instructions from the old chip to the new chip because the old chip is damaged. I have EPZ 2023+ software and hardware for reading eeprom, so I was wondering if it is possible with it. I also have an Arduino but don't have the knowledge to create a code.

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• #1 Reply
  Posted by voltsandjolts on 23 Mar, 2024 17:37
• The SH79F1619 has a code protection feature which has very likely been enabled by the manufacturer to prevent anyone reading/copying the firmware.
  
• #2 Reply
  Posted by wraper on 23 Mar, 2024 17:44
• IME read protection is not always enabled so there is significant chance it can be read. However as it's supposedly damaged, chances diminish greatly. I had some luck reading partially damaged MCU, however if it does not show any signs of life, chances reading it are close to zero.
• #3 Reply
  Posted by korisnik_123 on 23 Mar, 2024 18:09
• Thank you for your answers. Well, it does work, but maybe half of its inputs and outputs work. But the main question is: how can I read or write data from and to it? Do I need to acquire a special programmer and software, or can I use what I've said in the original post? 
  
• #4 Reply
  Posted by voltsandjolts on 23 Mar, 2024 19:21
• There is a chance the SH79F1619 program code can be read, although I think it is a small chance due to code protection.
  To try, you need to find a device programmer which has the SH79F1619 on the list of supported devices.
  I don't think the programmer in the OP is suitable.
  I also checked xgecu which are popular programmers, but they don't support it either.
  
• #5 Reply
  Posted by wraper on 23 Mar, 2024 20:45
• It has JTAG interface. Also look here https://github.com/gashtaan/sinowealth-8051-dumper
• #6 Reply
  Posted by wraper on 23 Mar, 2024 20:58
• Read app note attached. As of what will certainly work is this debugger https://www.yoycart.com/Product/525990161927/ with ProWriter software https://en.sinowealth.com/seach?type_id=68&a_v_type=1

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  99666.pdf
• #7 Reply
  Posted by korisnik_123 on 24 Mar, 2024 15:01
• Well, this looks promising. I'll take a look at it and try. Hopefully, it is not too difficult.
• #8 Reply
  Posted by korisnik_123 on 26 Mar, 2024 17:19
• A final update on the problem. I have contacted the developer of the suggested GitHub software, and, as told by him, it is not possible to write a hex file to the MCU without a dedicated programmer, meaning it is not possible to do it with an Arduino.
  
  Next, for suggested programmers, they are too expensive considering I would be using them just for this occasion. So it's a no-go for me.
  
  All in all, I must abandon this journey and close these threads. Thank you all for your help. 
• #9 Reply
  Posted by amyk on 27 Mar, 2024 01:44
• It's possible, just no one has been motivated enough to figure it out sufficiently yet.
  
  Contrast: https://www.eevblog.com/forum/blog/eevblog-1144-padauk-programmer-reverse-engineering/