Datasheet

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64x64 Matrices: Solder “E” Jumper
64x64 matrices are supported on the latest “Rev C” HATs only.
Look for the Address E pads located between the
HUB75 connector and Pi camera cutout.
Melt a blob of solder between the center “E” pad the
the “8” pad just above it (for 64x64 matrices in the
Adafruit shop)… or the “16” pad below (rare, for some
third-party 64x64 matrices…check datasheet).
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