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jpg 是TXD 输出的波形,驱动寄存器正常读取,不明白原因希望解释下
AFE4490 并没有 TXD 引脚. 倒是有 TXP/TXN 内部 H 桥驱动的 LED 输出. 你是不是问后面的下降原因?
我想应该是恒流控制的结果