Data storage device and mode-detection method thereof

摘要

A data storage device including a flash memory and a controller. The controller enables the flash memory to transmit a predetermined parameter stored in the flash memory according to a first predetermined trigger edge of a clock signal and reads the predetermined parameter transmitted by the flash memory according to the first predetermined trigger edge of the clock signal to obtain a first reference parameter in an asynchronous mode. The controller enables the flash memory to switch to a synchronous mode and transmit the predetermined parameter and reads the predetermined parameter transmitted by the flash memory according to the first predetermined trigger edge of the clock signal to obtain a second reference parameter in a detection mode.

主权项

1. A data storage device, capable of operating in an asynchronous mode and a detection mode, comprising:
a flash memory, arranged to store a predetermined parameter; and a controller, arranged to enable the flash memory to transmit the predetermined parameter according a first predetermined trigger edge of a clock signal and further arranged to read the predetermined parameter transmitted by the flash memory according to the first predetermined trigger edge of the clock signal to obtain a first reference parameter in the asynchronous mode, and arranged to enable the flash memory to switch to a synchronous mode and transmit the predetermined parameter and further arranged to read the predetermined parameter transmitted by the flash memory according to the first predetermined trigger edge of the clock signal to obtain a second reference parameter in the detection mode, wherein the controller is further arranged to compare the first reference parameter with the second reference parameter for determining whether the flash memory supports the synchronous mode.