本文主要是介绍新路程------SN74CB3Q3257的选择,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
由于采用了SN74CB3Q3257 作为HDMI 音频和ALC5616音频信号选择器,不得不看看spec,spec218页
The SN74CB3Q3257 is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer with a single output-enable
(OE) input. The select (S) input controls the data path of the multiplexer/demultiplexer. When OE is low, the
multiplexer/demultiplexer is enabled and the A port is connected to the B port, allowing bidirectional data flow
between ports. When OE is high, the multiplexer/demultiplexer is disabled and a high-impedance state exists
between the A and B ports.
也就是
OE S
低电平 低电平 A对B1
低电平 高电平 A对B2
高电平 随意 A与B隔离,不通
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