| 摘要 |
A two-way handshake circuit and method for communications between digital devices, such as microprocessors which employs one tri-state input/output port pin per microprocessoror digital device. The configuration of each tri-state input/output port pin is controlled by control software within the digital device. The tri-state input/output port pins are connected by a self-latching circuit employing two parallel branches. A first branch includes a first amplifier or inverter connected in series with a first resistor so as to allow voltage level changes to be reflected in only one direction. A second branch includes a second amplifier or inverter connected in series with a second resistor so as to allow voltage level changes to be reflected in the opposite direction of the first branch.
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