Via Technologies, Inc.

Chung-Heng Chen

Ying-Lang Chuang

Chin-Chi Chang

A system and method for upgrading data transmission performance under programmed input/output (PIO) mode is disclosed. In one embodiment, a PIO accelerating device is established in an IDE controller for handling data transmissions concerned with read/write operations after taking over associated control right from processing unit. A counter is configured in the PIO accelerating device for varying its stored content followed by a predetermined sequence in responsive to the input pulses of a system clock. A timing signal generator is also established in the PIO accelerating device for issuing signals directed to the IDE device and the buffer in the IDE controller for activating associated data transmission operations while the stored content reaches to a predetermined threshold. Optimal performance to data transmission under IO mode 4 of the PIO mode can be achieved by employing the disclosed hardware configuration.

System and method for data transmission using PIO accelerator device in an IDE controller

A method and an apparatus of loading a pre-load seed for a test code of a physical layer device (PHY). For a physical layer device including a scrambler and a Non-Return-to-Zero/Non-Return-to-Zero-Inverted (NRZ/NRZI) converter connected to the scrambler, where the NRZ/NRZI converter receives an NRZ signal outputted by the scrambler, and outputs an NRZI signal, the method includes the following steps. (a) Determine whether a plurality of starting bits of a frame are present. (b) Repeat from step (a) if the starting bits are not present. (c) Load the pre-load seed to the scrambler and transmitting the test code. (d) Set the NRZI signal in a high level when the NRZI signal is not in the high level. On the other hand, for a physical layer device having a descrambler, the method includes the steps of: (a) determining whether a plurality of starting bits of a frame are present; and (b) loading the pre-load seed to the descrambler to retrieve the test code. According to the invention, a frame starting-bits detector is used to determine the correct time to load the pre-load seed.

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Taipei, Taiwan

Chung-Heng Chen