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TLC1514与STM32的连接无输出

Other Parts Discussed in Thread: TLC1514

现在TLC1514的输入时钟为1MHz,SDI和CS信号都没有问题,发送写CFR指令和读CFR指令,但SDO没有数据输出,是一个不到2V的高电平。原理图如附件,不知是什么原因,求指教!