Adapter card for connection to a data bus in a data processing unit and method for operating a DDR memory module

US7624315B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Daniel Mysliwitz · Birkenfeld, DE
• Achim Schramm · Birkenfeld, DE

Key dates

• Filing date: Jul 2, 2004
• Grant date: Nov 24, 2009
• Expiry date: May 1, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G11C2029/0401
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

One embodiment of the invention provides an adapter card for connection to a data bus in a data processing unit. The adapter includes a DDR interface for connection of a DDR memory module, a memory unit for storing test mode data, a switching device, which, in a first switching state, connects the data bus to the DDR interface and, in a second switching state, decouples the DDR interface from the data bus and connects the memory unit to the DDR interface such that test mode data may be transmitted to a connected DDR memory module to call up a test mode in the DDR memory module. The adapter also includes a control circuit with a trigger input to control the switching device between the switching states depending on a trigger signal.