Memory module and method for operating a memory module
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United States of America Patent
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Apr 10, 2007
Grant Date -
May 12, 2005
app pub date -
Aug 27, 2004
filing date -
Aug 28, 2003
priority date (Note) -
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Abstract
A memory module has an electronic printed circuit board and a plurality of semiconductor memory chips. A series circuit of the semiconductor memory chips is formed with the aid of two leads that can be driven by external contacts of the printed circuit board, and with the aid of connection lines between in each case two semiconductor memory chips. By means of the series circuit, individual semiconductor memory chips can be driven selectively with respect to the rest of the semiconductor memory chips without having to interrupt the regular data transport via the address and control lines. During normal memory operation, chip-specific test data or other data can be interrogated and be read out via an electric loop formed between the further external contacts.
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