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gtoal
USA
3 Posts |
 Posted - 08/26/2022 : 16:41:12
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The compatibility list for the GQ4x4 at https://www.mcumall.com/store/list.html says that it supports the DS1245AB but not the DS1249AB, which matches what the software shows.
The pinouts are identical apart from the DS1249AB having the A17 address pin in the position where the DS1245AB has a N/C.
I'm fairly sure this means that the DS1249AB *should* be writable by the GQ4x4 with a small modification to devices.txt
Does anyone here know enough about tweaking devices.txt so that I can write to the DS1249AB-100 from my GQ4x4?
The closest match is the smaller DS1245AB:
Name="DS1245AB",ID="XXXX",Class="BQ4015",Category="SRAM",MFG="Dallas",VCC="5.5V",PINVCC="ZIF32_PIN32",CodeSize="131072",Package="DIP32";
I haven't made a new entry before. My guess would be just to double the "CodeSize=" value but I'm not confident that that is all that's needed.
Thanks,
Graham Toal <gtoal@gtoal.com>
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| Reply #1
anniel
2572 Posts |
Posted - 08/28/2022 : 05:59:57
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quote:
Originally posted by gtoal
The compatibility list for the GQ4x4 at https://www.mcumall.com/store/list.html says that it supports the DS1245AB but not the DS1249AB, which matches what the software shows.
The pinouts are identical apart from the DS1249AB having the A17 address pin in the position where the DS1245AB has a N/C.
I'm fairly sure this means that the DS1249AB *should* be writable by the GQ4x4 with a small modification to devices.txt
Does anyone here know enough about tweaking devices.txt so that I can write to the DS1249AB-100 from my GQ4x4?
The closest match is the smaller DS1245AB:
Name="DS1245AB",ID="XXXX",Class="BQ4015",Category="SRAM",MFG="Dallas",VCC="5.5V",PINVCC="ZIF32_PIN32",CodeSize="131072",Package="DIP32";
I haven't made a new entry before. My guess would be just to double the "CodeSize=" value but I'm not confident that that is all that's needed.
Thanks,
Graham Toal <gtoal@gtoal.com>
BQ4015 has the right address line. |
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| Reply #2
gtoal
USA
3 Posts |
Posted - 08/28/2022 : 17:18:25
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quote:
BQ4015 has the right address line.
Thank you! I'm going with Name="DS1249AB",ID="XXXX",Class="BQ4015",Category="SRAM",MFG="Dallas",VCC="5.5V",PINVCC="ZIF32_PIN32",CodeSize="262144",Package="DIP32";
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Edited by - gtoal on 08/28/2022 17:31:57 |
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| Reply #3
anniel
2572 Posts |
Posted - 08/29/2022 : 06:59:22
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quote:
Originally posted by gtoal
quote:
BQ4015 has the right address line.
Thank you! I'm going with Name="DS1249AB",ID="XXXX",Class="BQ4015",Category="SRAM",MFG="Dallas",VCC="5.5V",PINVCC="ZIF32_PIN32",CodeSize="262144",Package="DIP32";
Should work. |
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Support for DS1249AB ?
