发明授权
US07248597B2 General purpose input/output controller 有权
通用输入/输出控制器

General purpose input/output controller
摘要:
The present invention permits an I/O port to be used with a variety of different I/O devices, regardless of their device type implementation, such as tri-state I/O devices, pull-up I/O devices, or pull-down I/O devices. Thus, one set of pins may be used for various different I/O devices.
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