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Posts by [email protected] |
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Post #Avq809QEAPWtZvc3HM by [email protected] |
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took my 3D printer down for maintenance, and it seems one of the steppers on Z … |
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Post #AvvxeVAsmHRu4wEVYO by [email protected] |
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In case you don't know, and you highly likely don't, there is an ongoin… |
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Post #Avy3rBxKX06qHMFRia by [email protected] |
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Alien squigglies!#reverseengineering |
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Post #Aw12cCX6aR51FF9KLI by [email protected] |
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@yrabbit will you post about all the creepy stuff so we all could get the chill… |
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Post #Aw1Nzvfb25hcvsHDbU by [email protected] |
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With that said, welcome to another installment of #nakeddiefriday. What I have … |
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Post #Aw1PBaq8P6lPl5KcaW by [email protected] |
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The datasheet gives us this overview. There is the LCD driver, a whole bunch of… |
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Post #Aw1PYSeT0tyv1WmKGm by [email protected] |
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This is how I see it mapping onto the actual die. Unfortunately, there is no wa… |
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Post #Aw1Q5Gz1PwzUOI2ShM by [email protected] |
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Of particular interest are the segment drivers of the LCD controller. They are … |
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Post #Aw1QGokaDEsMIqn2bA by [email protected] |
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You can see how the whole chunk is copy-paste, the metal lines end at the botto… |
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Post #Aw1Qx6H9RbHOorBYkS by [email protected] |
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The density difference between ROM and RAM is striking. Here in this small snip… |
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Post #Aw1S58yXOFvPSmsWC8 by [email protected] |
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The ROM is the NAND type, with 8 chunks providing 8 bits of output. Here, I sho… |
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Post #Aw1STMWSfpveQfIIxk by [email protected] |
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I believe there are two selection lines coming in from the left (on the previou… |
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Post #Aw1TByhQ5wCfZdh73o by [email protected] |
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Ah, and the line of logic cells right at the bottom of the ROM likely handles b… |
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Post #Aw1TZSDeVTWPmwxto0 by [email protected] |
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The ROM seems to be made using ion implantation, so no chance of reading it opt… |
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Post #Aw1UF1iFRoChk66Dlw by [email protected] |
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Let's have a look at that circuitry next, then. The microcode ROM is driven… |
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Post #Aw1VPOyhtySykVJDsW by [email protected] |
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In the array itself, the left side is connected to a power rail, and the right … |
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Post #Aw1WKAi5cehF0Ibefw by [email protected] |
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Deciphering the control logic there is beyond me. :D So we move to the next thi… |
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Post #Aw1Ww9P2vllNxCoCRs by [email protected] |
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Probably finally, there's this circuit nugget. Note how it is not connected… |
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Post #Aw1X2kEYuJOhv836OG by [email protected] |
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Oh. The G458 is likely the mask set ID; each Toshiba die has a 4-character one. |
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Post #Aw1XIS6Q5RcOJvjLvM by [email protected] |
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With that, I think I will bring the thread to a close. Thanks for joining me on… |
