Index: fw/sdk/yc_uart.h
===================================================================
--- /YC3121_SDK/fw/sdk/yc_uart.h	(revision 826)
+++ /YC3121_SDK/fw/sdk/yc_uart.h	(working copy)
@@ -271,7 +271,7 @@
   * @param  USARTx: Select the USART or the UART peripheral.
   *         This parameter can be one of the following values:
   *         UART0, UART1.
-	*         timeout: 0x00~0xff
+	*         timeout: 0x0000~0xffff
   * @retval None
   */
 void UART_SetITTimeout(UART_TypeDef UARTx, uint16_t timeout);
Index: fw/sdk/yc_uart.c
===================================================================
--- /YC3121_SDK/fw/sdk/yc_uart.c	(revision 826)
+++ /YC3121_SDK/fw/sdk/yc_uart.c	(working copy)
@@ -91,7 +91,7 @@
     {
         DMA_SRC_ADDR(DMACH_UART1) = (int)buf;
         DMA_LEN(DMACH_UART1) = (DMA_LEN(DMACH_UART1) & 0xffff) | len << 16;
-        DMA_START(DMACH_UART0) = (1 << DMA_START_BIT);
+        DMA_START(DMACH_UART1) = (1 << DMA_START_BIT);
     }
 }