Semiconductor integrated circuit
AssigneeNEC Electronics Corporation
InventorTakashi Kawano
Life of this patent
Estimating the term…
Abstract
A semiconductor integrated circuit having a non-volatile memory has a data fetch control portion for generating a one-shot pulse having a protrusive pulse shaped waveform for fetching write data PD separately into each latch of upper order side and each latch of lower order side, based on a logical value of the least significant address of a write address PA at one write cycle of a write command in a write mode, “x 8 mode”. When a write command is input to a command system circuit, a write data fetch command is repeated twice, and write data PD is fetched for each 8 bits to a data latch portion and the data latch portion writes the input write data PD of 16 bits to the non-volatile memory in batch.
Claims6
A semiconductor integrated circuit comprising:
- a non-volatile memory;
- a data latch portion having [m×n] latches, holding input write data in [m×n] bits length, and outputting the write data to the non-volatile memory in batch;
- and
- a data fetch control portion for generating a data fetch pulse for fetching the write data into each latch of the n separate parts based on a logical value of the least significant address of write addresses in one write cycle of a write command of writing the write data into the non-volatile memory in “x m mode”, wherein the data fetch control portion repeats a write data fetch command n times when the write command is input in the write cycle of the write command, and inputs the write data of [m×n] bits in length to the data latch portion for each m bits in “x m mode”, and the data latch portion outputs the write data of [m×n] bits in length to the non-volatile memory in batch.
Dependencies are inferred from the claim text.