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NovaSec
United Kingdom
27 Posts |
 Posted - 09/22/2014 : 09:49:50
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| Is there a way to protect the code on a 24C256L, read loads of these in the past but had a couple now that i cant read in circuit, could the circuit be a problem ? or can it be protected ? |
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| Reply #1
ZLM
2945 Posts |
Posted - 09/22/2014 : 17:47:35
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check you 24C256L chip address pins. The software can change the address by click the CFG button.
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| Reply #2
NovaSec
United Kingdom
27 Posts |
Posted - 09/24/2014 : 09:59:53
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| Thanks, tried another chip from a different panel today and the same. Just looked at CFG button and it gives me 3 options will have a read. |
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| Reply #3
NovaSec
United Kingdom
27 Posts |
Posted - 09/24/2014 : 22:18:18
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| Tried CFG and selecting a changing the address still nothing |
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| Reply #4
NovaSec
United Kingdom
27 Posts |
Posted - 09/26/2014 : 06:44:40
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| Tried another today and the same nothing, can anybody help me out on this. |
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| Reply #5
ZLM
2945 Posts |
Posted - 09/26/2014 : 14:52:11
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| If your board CPU controls this chip, then you are unable to read/write the chip while the CPU occupied it. In this case you need to de-solder the chip and program it on the programmer ZIF socket. |
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| Reply #6
NovaSec
United Kingdom
27 Posts |
Posted - 09/27/2014 : 01:26:06
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| I tried a different chip from the same but older panel that has a DIL socket for the eeprom, removed it and tried to read it all blank again. |
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| Reply #7
NovaSec
United Kingdom
27 Posts |
Posted - 09/28/2014 : 06:23:55
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| Just dusted of a old serial programmer, and used IC Prog to read this chips without a problem, can something have gone wrong with my GQ-4X never had issues before. |
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| Reply #8
ZLM
2945 Posts |
Posted - 09/30/2014 : 07:39:38
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| If your chip can be easily removed from the board, then you can just program it on the programmer. That should not have problem. |
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| Reply #9
NovaSec
United Kingdom
27 Posts |
Posted - 09/30/2014 : 11:17:53
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The last one i tried was socketed DIL so easy removed, tried in GQ-4x nothing then as per post 7
could i have changed something in the software ??? |
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| Reply #10
ZLM
2945 Posts |
Posted - 09/30/2014 : 11:53:30
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In oder to change the sofware, we need to repeat the problem here and know what is the software problem.
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Topic |
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GQ-4X reading 24c256l
