Ati Technologies Inc.

Ati Technologies Ulc

Sam Huynh

Lin Chen

Claude R Gauthier

Joseph D Macri

Gin S Yee

Arvind Bomdica

Sagheer Ahmad

Siji Menokki Kandiyil

Joe Macri

Shu-Shia Chow

Edward Lee

Hiok-Tiaq Ng

John Ling

Jennifer Ho

Siji MK

Gin Yee

An IO method and system for bit-deskewing are described. Embodiment includes a computer system with multiple components that transfer data among them. In one embodiment, a system component receives a forward strobe signal and multiple data bit signals from a transmitting component. The receiving component includes a forward strobe clock recovery circuit configurable to align a forward strobe sampling clock so as to improve sampling accuracy. The receiving component further includes at least one data bit clock recovery circuit configurable to align a data bit sampling clock so as to improve sampling accuracy, and to receive a signal from the forward strobe clock recovery circuit that causes the data bit sampling clock to track the forward strobe sampling clock during system operation.

Bit-deskewing IO method and system

An impedance compensation circuit generates per-group pull-up impedance information and per-group pull-down impedance information to calibrate a plurality of input/output pads and dynamically updates impedance information on a per channel basis. A group refers to a group of I/O pads having similar output drive strengths in a channel. A channel refers to all I/O pads, which collectively provide a bus interface to an external device. For example, all the I/O pads interfacing with a memory module may be grouped into a channel, and address I/O pads in a channel may be arranged into a 'group.' Memory I/O pads may be grouped together into a channel since memory interface pads have input/output characteristics that may be different from those of other types of I/O pads in the chip. According to one embodiment, per-group programmable offset information provides calibration information that may be different for each group in each channel.

Dynamic impedance compensation circuit and method

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San Bruno, CA, United States of America

Sam Huynh