Patent ID: 11908947
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 4:
5. A semiconductor device comprising:
a CPU; and
an accelerator,
wherein the accelerator comprises a first memory circuit and an arithmetic circuit,
wherein the first memory circuit comprises a first transistor,
wherein the first transistor comprises a semiconductor layer comprising a metal oxide in a channel formation region,
wherein the arithmetic circuit comprises a second transistor,
wherein the second transistor comprises a semiconductor layer comprising silicon in a channel formation region,
wherein the CPU comprises a CPU core comprising a flip-flop with a backup circuit,
wherein the backup circuit comprises a third transistor,
wherein the third transistor comprises a semiconductor layer comprising a metal oxide in a channel formation region, and
wherein the first transistor is stacked over the second transistor.