diff --git a/STM32F103_App1/HardWare/IIC/iic.h b/STM32F103_App1/HardWare/IIC/iic.h
index d9992a5..4f905c7 100644
--- a/STM32F103_App1/HardWare/IIC/iic.h
+++ b/STM32F103_App1/HardWare/IIC/iic.h
@@ -3,7 +3,7 @@
 
 #include "main.h"
 
-/* Software I2C pins: PA12=SDA, PA11=SCL */
+/* Software I2C pins: PB4=SDA, PB5=SCL (V1.7.0 新板; OLED 屏 OLED_SDA/OLED_SCL 也挂这条总线) */
 #define SDA_GPIO_Port   GPIOB
 #define SDA_Pin         GPIO_PIN_4
 #define SCL_GPIO_Port   GPIOB