{{tag>collection_philpem vendor_vlsi-technology type_unknown year_unknown foundry_unknown}}

ARM2 microprocessor. This is the first ARM chip which saw mass production, and has a number of improvements over the ARMv1.

This chip is an early production ARM2 which was found to be faulty and removed from an Acorn Archimedes series workstation.

====== Package ======

PLCC, 84 pins.

{{:philpem:vlsi-technology:arm2:pack_top.jpg?300|}}

<code>
(VLSI logo)
8839AV   I8581
VL2333-QC
ARM
ACORN
</code>

{{:philpem:vlsi-technology:arm2:pack_btm.jpg?300|}}

<code>
</code>


====== Die ======

<code>
2333
ACORN
AV 005
ARM2UM
</code>

(The chip geometry is reportedly 2um, so "ARM2UM" could simply mean "ARM, 2um")

Chip contains designer credits:
<code>
SBF
ARW
JSU
HEO
JRS
DWH
</code>

These are the same people as the [[philpem:vlsi-technology:vl86c020|ARM3]]:

  * SBF: Steve Furber
  * ARW: Sophie Wilson
  * JSU: Jamie Urquhart
  * HEO: Harry Oldham
  * JRS: Jim Sutton
  * DWH: Dave Howard

The only chip art present is the Acorn nut logo at top-right near the layer/diffusion identifiers. The Acorn logo text with slanted A is bottom-centre above the I/O pads, the credits are bottom-right, and the die identifiers are at top left among the I/O pads.

{{https://siliconprawn.org/map/vlsi-technology/arm2/single/vlsi-technology_arm2_philpem_mz_ms10x.thumb.jpg}}

[[https://siliconprawn.org/map/vlsi-technology/arm2/philpem_mz_ms10x/|mz_ms10x]]

  * [[https://siliconprawn.org/map/vlsi-technology/arm2/single/vlsi-technology_arm2_philpem_mz_ms10x.jpg|Single]] (14827x15078, 37.7134MiB)