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?