Abstract: The present disclosure discloses a memory access interface device. A clock generation circuit generates reference signals. A transmitter transmits an output command and address signal to a memory device according to the reference signals. A signal training circuit executes a training process in a training mode that includes steps outlined below. A training signal is generated such that the training signal is transmitted as the output command and address signal. The training signal and the data signal generated by the memory device are compared to generate a comparison result indicating whether the data signal matches the training signal. The comparison result is stored. The clock generation circuit is controlled to modify a phase of at least one of the reference signals to be one of a plurality of under-test phases to execute a new loop of the training process until all the under-test phases are trained.

Abstract: The present disclosure discloses a memory access interface device. A clock generation circuit generates reference clock signals. Each of access signal transmission circuits each includes a duty cycle adjusting circuit, a duty cycle detection circuit, a frequency division circuit and an asynchronous first-in-first-out circuit. The duty cycle adjusting circuit performs duty cycle adjustment on one of the reference clock signals according to a duty cycle detection signal to generate an output clock signal having a duty cycle. The duty cycle detection circuit detects a variation of the duty cycle to generate the duty cycle detection signal. The frequency division circuit divides a frequency of the output clock signal to generate a read clock signal. The asynchronous first-in-first-out circuit receives an access signal from a memory access controller and outputs an output access signal according to the read clock signal to access the memory device accordingly.

Abstract: A luggage truck includes a base frame fixedly fastened to a luggage body at the bottom, two parallel sleeves respectively pivoted to the base frame and joined by a transverse connecting bar, two sliding tubes respectively sliding in the sleeves and joined by a handle grip outside the sleeves, and two sliding coupling devices moved on the sleeves and coupled to a locating frame at the rear side of the luggage body, each sliding coupling device including a sliding block mounted around one sleeve, a connector having a first coupling tube coupled to the sliding block and a second coupling tube extended from the first coupling tube at right angles, a first link having a hooked bottom end inserted into a through hole in the sliding block and hooked on the first coupling tube of the connector and a top end coupled to the handle grip, and a second link having one end pivoted to the locating frame of said luggage body and an opposite end connected to the second coupling tube of the connector.