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Serial communication circuit

2015-01-28 17:55  
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Serial communication circuit
The system implements serial port module is mainly by communicating with the host computer. The microcontroller system will send the collected data to the host computer for processing, thereby reducing the processing burden on the system microcontroller. As electricity level is different when the microcontroller is communicated with the PC interface, interface conversion is needed. The SP3220 chip is used here to complete the conversion on interface’s electricity level. SP3220 chip is with low power consumption and small package and other features. Before the introduction of specific circuits, SP32 ⒛ chip is introduced. SP32 ⒛ chip has the following characteristics.