Non-volatile semiconductor memory device having reduced power requirements
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorRie Aruga
Life of this patent
Estimating the term…
Abstract
A non-volatile semiconductor memory device includes a first memory bank, a second memory bank, a first power supply circuit, and a second power supply circuit. In write operation, the first power supply circuit supplies a boosted voltage to the first memory bank, and the second power supply circuit supplies a boosted voltage to the second memory bank. This enables sufficient current supply capability to be assured. On the other hand, in read operation, only the second power supply circuit supplies a boosted voltage to the first and second memory banks. This enables reduction in power consumption.
Claims10
A non-volatile semiconductor memory device, comprising:
- first and second memory banks;
- a first power supply circuit for supplying to the first memory bank a boosted voltage for writing to a memory cell in the first memory bank in write operation;
- and
- a second power supply circuit for supplying to the second memory bank a boosted voltage for writing to a memory cell in the second memory bank in write operation, and for supplying to the first and second memory banks a boosted voltage for reading from a memory cell in the first and second memory banks in read operation.
A non-volatile semiconductor memory device for simultaneously writing to a plurality of memory banks in write operation, and selectively reading from at least one of the plurality of memory banks in read operation, comprising:
- first and second memory banks;
- a first power supply circuit for outputting a boosted voltage for writing to a memory cell in the first memory bank in write operation;
- a second power supply circuit for outputting a boosted voltage for writing to a memory cell in the second memory bank in write operation, and for outputting a boosted voltage for reading from a memory cell in the first and second memory banks in read operation;
- and
- a supply control circuit for supplying the boosted voltage for writing from the first power supply circuit to the first memory bank as well as supplying the boosted voltage for writing from the second power supply circuit to the second memory bank in write operation, and for supplying the boosted voltage for reading from the second power supply circuit to the first and second memory banks in read operation.
Dependencies are inferred from the claim text.