Package
Markings:
(ATMEL logo)
MEGA32U4
-MU
1135E TH
1G1613-2
Die
Size is approximately 4150 x 3600 μm (14.94 mm2)
Logos
Fuse logic?
Some kind of array organized in 8-bit blocks. SRAM?
Random logic
This looks more like SRAM than the other array, but if this is the SRAM what is the other one?