发明名称 |
Microprocessor data input switching circuit - uses interrogated switch groups connectable to multiple channel data bus |
摘要 |
<p>A circuit delivering input data to a microprocessor circuit has switches, esp. keyboard switches, which place switching signals onto a data bus connected to the microprocessor and having several data channels. The switches are connected to a common reference potential. It requires only a few channels connecting the switches to the circuit and includes a facility whereby a user connection signal is returned. The switches are arranged in groups of a number equal to the number of data channels being used. Interrogation pulses activate the switch groups.</p> |
申请公布号 |
DE2815234(A1) |
申请公布日期 |
1979.10.18 |
申请号 |
DE19782815234 |
申请日期 |
1978.04.08 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
HAUBNER,GEORG;SCHRUMPF,HANS,ING. |
分类号 |
H03M11/20;(IPC1-7):G06F3/02 |
主分类号 |
H03M11/20 |
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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