发明名称 |
System mit einer Prozessorschnittstelle für ein Tablettcomputer |
摘要 |
A digitizer tablet computer has a host processor connected to a service processor which, in turn, is connected to a digitizer controller and to a power subsystem microcontroller whereby primary control of a keyboard, a digitizer, and a power subsystem is off loaded from the host processor to the service processor. The host processor communicates with the service processor through an interface comprising a status register, an input buffer and an output buffer through which host commands and data are transferred. The digitizer produces coordinate data that is initially processed in the service processor before being passed on to the host processor. The host processor is interrupted to receive the processed data and executes in a tight loop until a predetermined amount of processed data is received. |
申请公布号 |
DE69332940(T2) |
申请公布日期 |
2004.03.11 |
申请号 |
DE1993632940T |
申请日期 |
1993.03.25 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORP., ARMONK |
发明人 |
KANNAN, KRISHNAMURTHI;LEONTIADES, KYRIAKOS;NOVAK, FRANK PETER;SHARMA, VIKRAM |
分类号 |
G06F3/041;G06F3/038;(IPC1-7):G06F3/033 |
主分类号 |
G06F3/041 |
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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