Differences

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--- felinefriendly:bosch:b30074 [2018/07/27 21:23] – [Description] e30tuner
+++ felinefriendly:bosch:b30074 [2018/11/21 21:36] (current) – Added new high-res images of successful decap e30tuner
@@ Line 2: / Line 2: @@
 ====== Description ======
-This part was taken from a Motronic M1.7 engine control unit (ECU), which was used on the M42 engine of the BMW E30 318iS.
+This part was taken from a Motronic M1.7 engine control unit (ECU), which was used on the M42 engine of the BMW E30 318iS. While this chip was likely used on a number of ECUs, the specific one in this case had Bosch PN 0 261 200 175.
 Functionally, this chip serves a variety of purposes, with the best high-level description stating that it is a programmable peripheral interface (PPI). It bears some similarity to standard devices such as the 8155 and 8255, but it is clearly a custom part based on the number of IO's. Some of the functions it provides are:
@@ Line 36: / Line 36: @@
 ====== Die ======
+<code>
+Decap Steps:
+Grind bottom side of package with 60 & 240 grit sandpaper until die is exposed
+Grind top side of package until ~0.5mm remains above die
+Use precision diagonal cutters to fracture remaining packaging off of die
+Use CA glue to bond die to glass slide (the "glob top" material is still present at this stage)
+Use optical swabs and IPA to scrub "glob top" coating off
+Rinse with IPA
+Clean with fine polishing cloth and IPA
+Polish with fine polishing cloth and 0.5 micron polycrystalline diamond suspension
+Capture Details:
+Imaging device: Keyence VHX-2000
+Magnification: 500X
+Markings:
+V733V1
+[Bosch Logo]
+Bosch
+©1986
+©1987
+CC151
+</code>
+Imaged using normal / center lighting:
+{{:felinefriendly:bosch:b30074:s702_die_normallight_500x_small.jpg?400|}}
+//Note: This is a ~16X downsampled version of the original image. A full resolution version (55MB) can be provided. On the to-do list…//
+Imaged using edge lighting, for enhanced shadow contrast:
+{{:felinefriendly:bosch:b30074:s702_die_edgelight_500x_small.jpg?400|}}
+//Note: This is a ~16X downsampled version of the original image. A full resolution version (85MB) can be provided. On the to-do list…//
+====== Die - Original Attempt ======
 <code>