Ati Technologies Ulc

Ati Technologies Inc.

Joe Macri

Sagheer Ahmad

Lin Chen

Eric E Scott

Sam Huynh

Shu-Shia Chow

Dan Shimizu

The disclosure relates to a programmable virtual memory client, that includes programmable control logic configured to generate at least one data pattern sequence from a number of stored data patterns. Additionally, the virtual memory client includes virtual memory client control logic configured to use the generated at least one data pattern sequence to at least one of read from and write to at least one memory device. A method includes generating at least one data pattern sequence from a number of stored data patterns and writing and reading the data pattern sequence from and to a memory device.

Apparatus and methods for tuning a memory interface

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 Francisco, CA, United States of America

Joe Macri