Differences

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--- philpem:vlsi-technology:vl86c020 [2024/07/06 06:33] – external edit 127.0.0.1
+++ philpem:vlsi-technology:vl86c020 [2025/10/20 09:43] (current) – philpem
@@ Line 1: / Line 1: @@
 {{tag>collection_philpem vendor_vlsi-technology type_unknown year_unknown foundry_unknown}}
+VL86C020 is the production release version of the Acorn ARM3 processor.
 ====== Package ======
+Pin grid array, 144 pins.
 {{:philpem:vlsi-technology:vl86c020:pack_top.jpg?300|}}
 <code>
+(VLSI logo) VLSI
+AV  153542
+VL86C020-PSGCP
+-0000
+KOREA
 </code>
@@ Line 13: / Line 22: @@
 <code>
 </code>
+====== Decap ======
+Removed metal lid by bending the edges up and levering it off the epoxy. Hot air (480C at max airflow) + bending with vice and pliers to crack the plastic away from the die.
+The PCB which the die is mounted on presents a bit of trouble vs. a plastic-plus-leadframe type package. Basically keep heating, and try to make the plastic crack across the die so the plastic falls away.
+Die is located in the centre of the package, sized approx 10mm square.
+The die is polyimide coated - the plastic packaging may stick to it. Polyimide removal TBD.
@@ Line 18: / Line 38: @@
 <code>
+ACORN
+(M) VLSI
+(VLSI logo) (C) '88
+VL86C020
+SBF
+ARW
+JSU
+HEO
+JRS
+DWH
+(C) ACORN 1988 (T) ACORN 1988
+(Acorn logo)
+ACORN
+ARPT
+JSU
+HEO
+DWH
 </code>
-{{https://siliconpr0n.org/map/vlsi-technology/vl86c020/single/vlsi-technology_vl86c020_philpem_mz_10x.thumb.jpg}}
+{{https://siliconprawn.org/map/vlsi-technology/vl86c020/single/vlsi-technology_vl86c020_philpem_mz_10x.thumb.jpg}}
+[[https://siliconprawn.org/map/vlsi-technology/vl86c020/philpem_mz_10x/|mz_10x]]
+  * [[https://siliconprawn.org/map/vlsi-technology/vl86c020/single/vlsi-technology_vl86c020_philpem_mz_10x.jpg|Single]] (35856x40608, 216.389MiB)
+===== Credits =====
+Thanks to Prof. Steven Furber for kindly identifying the names behind the initials on the die:
-[[https://siliconpr0n.org/map/vlsi-technology/vl86c020/philpem_mz_10x/|mz_10x]]
+  * SBF: Steven Furber
+  * ARW: Sophie Wilson
+  * JSU: Jamie Urquhart
+  * HEO: Harry Oldham
+  * JRS: Jim Sutton
+  * DWH: Dave Howard
+  * ARPT: Alasdair Thomas
-  * [[https://siliconpr0n.org/map/vlsi-technology/vl86c020/single/vlsi-technology_vl86c020_philpem_mz_10x.jpg|Single]] (35856x40608, 216.389MiB)