diff --git a/App/ACZero.cpp b/App/ACZero.cpp
index 9f353b9f..154adc51 100644
--- a/App/ACZero.cpp
+++ b/App/ACZero.cpp
@@ -98,7 +98,7 @@ bool ACZero::Wait(int usDelay) const
 	if (ms < 0 && ms > 40) return false;
 
 	// 4号继电器作为输出信号
-	static OutputPort sign(PB14);
+	static OutputPort sign(PA5);
 	sign != sign;
 
 	// 计算下一次零点什么时候到来
diff --git a/Device/SerialPort.cpp b/Device/SerialPort.cpp
index dfc7d5f5..c040fb24 100644
--- a/Device/SerialPort.cpp
+++ b/Device/SerialPort.cpp
@@ -57,9 +57,9 @@ void SerialPort::Set(COM index, int baudRate)
 	if (_baudRate <= 0)
 	{
 		int clock = Sys.Clock;
-		if (clock >= 72)
+		if (clock > 72)
 			_baudRate = 2048000;
-		else if (clock >= 36)
+		else if (clock > 36)
 			_baudRate = 1024000;
 		else
 			_baudRate = 115200;