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azonenberg:microchip:23k256 [2014/04/08 03:26] azonenberg |
azonenberg:microchip:23k256 [2015/01/04 17:50] (current) |
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| SPI serial SRAM chip. Looks like 4 metal layers and a fairly fine process geometry. | SPI serial SRAM chip. Looks like 4 metal layers and a fairly fine process geometry. | ||
| - | Definitely //not// one of Microchip's standard fan processes. CMP filler pattern is consistent with UMC 180 nm (pitch and dimensions of CMP filler and traces on both M4 and M3 match [[azonenberg:xilinx:xc2c32a]] within 3%) however this is the only evidence we have to support this conclusion at this time; tag is tentative. | + | Definitely //not// one of Microchip's standard fab processes. CMP filler pattern is consistent with UMC 180 nm (pitch and dimensions of CMP filler and traces on both M4 and M3 match [[azonenberg:xilinx:xc2c32a]] within 3%) however this is the only evidence we have to support this conclusion at this time; tag is tentative. |
| The die ID also does not match the normal Microchip layout and there is no Microchip logo on the die. Maybe this mask set was acquired from a buyout or something? | The die ID also does not match the normal Microchip layout and there is no Microchip logo on the die. Maybe this mask set was acquired from a buyout or something? | ||