Methods and systems for reconfiguring data memory of an embedded controller managed flash memory device are disclosed. According to one method, using a controller managed flash memory device reconfiguration module configured to execute on a general purpose computing platform separate from a computing platform in which an embedded controller managed flash memory device is located, reconfiguration data to be written to a data memory of the embedded controller managed flash memory device is received from a user and I/O commands for writing the reconfiguration data to an external device are generated. Flash device commands corresponding to the I/O commands are generated. The reconfiguration data is communicated to the data memory of the embedded controller managed flash memory device by sending the flash device commands and the reconfiguration data over a flash device interface of the embedded controller managed flash memory device.