MX25L6406E M21-12G, x2, 64 Megabit Serial NOR Flash Memory Chip, SOIC8, 200mi.

General Description
The device feature a serial peripheral interface and software protocol allowing
operation on a simple 3-wire bus. The three bus signals are a clock input (SCLK)
a serial data input (SI), and a serial data output (SO). Serial access to the
device is enabled by CS# input.

When it is in Dual Output read mode, the SI and SO pins become SIO0 and SIO1
pins for data output.

The device provides sequential read operation on whole chip.

After program/erase command is issued, auto program/erase algorithms which program
erase and verify the specified page or sector/block locations will be executed.
Program command is executed on byte basis, or page basis, or word basis for erase
command is executes on sector, or block, or whole chip basis.

To provide user with ease of interface, a status register is included to indicate
the status of the chip. The status read command can be issued to detect completion
status of a program or erase operation via WIP bit.

Advanced security features enhance the protection and security functions.

When the device is not in operation and CS# is high, it is put in standby mode.
The device utilizes Macronix's proprietary memory cell, which reliably stores
memory contents even after typical 100,000 program and erase cycles.

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