AT25XV021A memory equivalent, spi serial flash memory.
* Single 1.65V - 4.4V Supply
* Serial Peripheral Interface (SPI) Compatible
* Supports SPI Modes 0 and 3
* Supports Dual-I/O Operation
* 70MHz Maximum.
* Small (256-Byte) Page Erase
* Uniform 4-Kbyte Block Erase
* Uniform 32-Kbyte Block Erase
* Uniform 64-.
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