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Helpful ReplyHot!My Arduino-based RAM SPD reader/writer (free and open source)

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tekton2m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/14 01:35:51 (permalink)
There is a 9V optocoupler on the 4th leg. The optocoupler is new and working, tested by a probe. There is no other arduino.  Which one is better to buy on ATmega328P or Atmega168P?
post edited by tekton2m - 2024/02/14 01:38:48
a213m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/14 02:17:18 (permalink)
Ok, test the Arduino then. Try different HV_EN and HV_FB pins, if default ones aren't working.
ATmega328P has more flash memory and EEPROM storage, so it would be a better choice, IMO.

My free and open source SDR-DDR5 SPD reader/writer with write protection capabilities
 
New: 13900K, Z790 HERO, 2x32GB 6800C32, 4090, 2TB SN850, AX1600i
Old: 10980XE, X299SE2, 8x8GB 4000C15, 4090, 2TB SN850, AX1600i
tekton2m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/14 02:24:00 (permalink)
I tried to repeat HV_EN on D10, the same thing. Thanks for the help. I'll buy a new one, then I'll write.
tekton2m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 01:25:57 (permalink)
Hello! I can't do it.
I bought another Arduino nano, everything is the same. I checked the scheme more than once. The DIMM adapter is working, another programmer is reading it. All the elements are according to your scheme. What's next?
I'm using version 20231210, and it's the same with 20230930.
a213m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 01:27:58 (permalink)
Post a photo of your setup.

My free and open source SDR-DDR5 SPD reader/writer with write protection capabilities
 
New: 13900K, Z790 HERO, 2x32GB 6800C32, 4090, 2TB SN850, AX1600i
Old: 10980XE, X299SE2, 8x8GB 4000C15, 4090, 2TB SN850, AX1600i
tekton2m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 02:08:36 (permalink)
You can measure the voltage on the D9 HV_EN at the time of Arduino initialization in the RW_SPD program. I have less than 1 V. on D9 , and in order to open the optocoupler, you need > 3 V.
How do you power the Arduino, via USB or an external source on the VIN?
a213m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 02:12:20 (permalink)
Mine is powered entirely off USB.

My free and open source SDR-DDR5 SPD reader/writer with write protection capabilities
 
New: 13900K, Z790 HERO, 2x32GB 6800C32, 4090, 2TB SN850, AX1600i
Old: 10980XE, X299SE2, 8x8GB 4000C15, 4090, 2TB SN850, AX1600i
tekton2m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 02:16:58 (permalink)

tekton2m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 02:18:28 (permalink)
How do you run the RW_SPD program then?
a213m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 02:36:08 (permalink)
It seems like your VOUT- is connected to SDA or SCL line. If that is the case, your SDA or SCL pin is grounded via VIN- pin, which could be the reason Arduino can't see any I2C devices.
 

 
Check the resistance between SDA/SLC and GND. It should not be 0.
post edited by a213m - 2024/02/17 02:38:59

My free and open source SDR-DDR5 SPD reader/writer with write protection capabilities
 
New: 13900K, Z790 HERO, 2x32GB 6800C32, 4090, 2TB SN850, AX1600i
Old: 10980XE, X299SE2, 8x8GB 4000C15, 4090, 2TB SN850, AX1600i
tekton2m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/02/17 02:48:08 (permalink)
Thank you for seeing it. Everything has been decided.
Thank you very much!
post edited by tekton2m - 2024/02/17 04:29:16
Sanzhar94
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/04/12 11:12:03 (permalink)
MaPuXyAnA
Hello! Did I assemble the diagram correctly?

 



Hello, a213m! My friend assembled DDR5 adapter by this guide, will it work? Or i need something more? I have arduino nano too.








post edited by Sanzhar94 - 2024/04/12 11:15:31
a213m
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/04/12 14:19:57 (permalink)
I used exact same DDR5 adapter. Everything looks good with your work, you used correct pins, and wiring and soldering looks good.

My free and open source SDR-DDR5 SPD reader/writer with write protection capabilities
 
New: 13900K, Z790 HERO, 2x32GB 6800C32, 4090, 2TB SN850, AX1600i
Old: 10980XE, X299SE2, 8x8GB 4000C15, 4090, 2TB SN850, AX1600i
Sanzhar94
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Re: My Arduino-based RAM SPD reader/writer (free and open source) 2024/04/16 01:23:06 (permalink)
Hello! Your adapter worked, but my ddr5 stick damaged, i flashed correct SPD data from working module, but it doesn't help, thanks for your adapter!!!
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