发明授权
US5506991A Printer port adapter with overlaid one-wire interface for electronic key
失效
打印机端口适配器，带有重叠的单线接口，用于电子钥匙
- 专利标题： Printer port adapter with overlaid one-wire interface for electronic key
- 专利标题（中）： 打印机端口适配器，带有重叠的单线接口，用于电子钥匙
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申请号： US631929申请日： 1990-12-19
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公开(公告)号： US5506991A公开(公告)日： 1996-04-09
- 发明人: Stephen M. Curry , Michael L. Bolan , William L. Payne, II , Kevin E. Deierling , Guenter H. Lehmann
- 申请人： Stephen M. Curry , Michael L. Bolan , William L. Payne, II , Kevin E. Deierling , Guenter H. Lehmann
- 申请人地址： TX Dallas
- 专利权人： Dallas Semiconductor Corporation
- 当前专利权人： Dallas Semiconductor Corporation
- 当前专利权人地址： TX Dallas
- 主分类号： G06F1/00
- IPC分类号： G06F1/00 ; G06F3/023 ; G06F3/038 ; G06K7/00 ; G06K19/07 ; G06K19/077 ; G11C5/00 ; G11C5/06 ; G11C7/24 ; G11C8/20 ; H01L23/58 ; H04B1/40 ; H05K1/00 ; H05K3/32 ; G06F13/00
摘要：
A printer port adapter which permits electronic keys to be accessed through the printer port of the PC, without disrupting the normal operation of the printer port in any mode of operation whatsoever. The electronic keys used have a one-wire signal interface, and this interface can be inserted into the full standard ISA printer port pin assignment, as well as the all known nonstandard additional assignments which have been overlaid onto the standard printer port.