发明名称 |
FREMGANGSMAATE FOR OMKASTING AV EN INNTASTING PAA ET IKKE-KODET TASTATUR, SAMT KRETS FOR IVERKSETTELSE AV FREMGANGSMAATEN. |
摘要 |
The present invention relates to a method for distorting and the circuit for carrying out this method. The method of distorting consists: a) in output-connecting all the rows and columns of the keyboard to the outputs of a first register (160) of a parallel input-output interface (16) by way of a circuit (163, 166, 164); b) in connecting all the rows and columns of the keyboard to the inputs of the second register (167) of the input-output interface; c) in randomly drawing the order in which the outputs are to be scanned; d) in setting at least one of the outputs to "1" and in observing whether one of the corresponding inputs is at "1"; e) in the contrary case, in scanning each of the remaining lines one by one while setting it to "1" until the associated input is at the value "1"; f) in repeating steps d) and e) to determine the column or respectively the line corresponding to the depressed key of the keyboard. <IMAGE> |
申请公布号 |
NO895116(D0) |
申请公布日期 |
1989.12.19 |
申请号 |
NO19890005116 |
申请日期 |
1989.12.19 |
申请人 |
BULL SA |
发明人 |
VERRIER, PHILIPPE;POULENARD, ROGER;FINK, HARTMUT |
分类号 |
G06F1/00;G06F3/023;G06F21/00;G06F21/83;H03M11/20;(IPC1-7):G06F/ |
主分类号 |
G06F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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