diff --git a/demo/uart/uart1_timer1_tx.c b/demo/uart/uart1_timer1_tx.c
new file mode 100644
index 0000000..f9971d2
--- /dev/null
+++ b/demo/uart/uart1_timer1_tx.c
@@ -0,0 +1,30 @@
+// Copyright 2021 IOsetting <iosetting(at)outlook.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "fw_hal.h"
+
+void main(void)
+{
+    SYS_SetClock();
+    // UART1, baud 115200, baud source Timer1, 1T mode, no interrupt
+    UART1_ConfigMode1Dyn8bitUart(UART1_BaudSource_Timer1, HAL_State_ON, 115200);
+    while(1)
+    {
+        UART1_TxChar('T');
+        UART1_TxHex(0x41);
+        UART1_TxString("U");
+        UART1_TxString(" string\r\n");
+        SYS_Delay(1000);
+    }
+}
\ No newline at end of file
diff --git a/demo/uart/uart1_interrupt_tx_rx.c b/demo/uart/uart1_timer2_interrupt_tx_rx.c
similarity index 100%
rename from demo/uart/uart1_interrupt_tx_rx.c
rename to demo/uart/uart1_timer2_interrupt_tx_rx.c
diff --git a/demo/uart/uart1_tx.c b/demo/uart/uart1_timer2_tx.c
similarity index 100%
rename from demo/uart/uart1_tx.c
rename to demo/uart/uart1_timer2_tx.c
diff --git a/demo/uart/uart2_tx.c b/demo/uart/uart2_timer2_tx.c
similarity index 100%
rename from demo/uart/uart2_tx.c
rename to demo/uart/uart2_timer2_tx.c
diff --git a/include/fw_mem.h b/include/fw_mem.h
index 3847eb4..6fdfd6a 100644
--- a/include/fw_mem.h
+++ b/include/fw_mem.h
@@ -32,6 +32,9 @@ typedef enum
 
 void MEM_SelectWorkRegGroup(MEM_WorkRegGroup_t WorkRegGroup);
 void MEM_SetOnchipExtRAM(HAL_State_t HAL_State);
+
+#if (__CONF_MCU_TYPE == 3  )
 void MEM_ReadChipID(uint8_t *buff);
+#endif
 
 #endif
diff --git a/src/fw_mem.c b/src/fw_mem.c
index 7f56c20..e5d3446 100644
--- a/src/fw_mem.c
+++ b/src/fw_mem.c
@@ -25,6 +25,7 @@ void MEM_SetOnchipExtRAM(HAL_State_t HAL_State)
 	AUXR = AUXR & ~B00000010 | (HAL_State << 1);
 }
 
+#if (__CONF_MCU_TYPE == 3  )
 void MEM_ReadChipID(uint8_t *buff)
 {
     uint8_t i;
@@ -34,4 +35,5 @@ void MEM_ReadChipID(uint8_t *buff)
 		*(buff + i) = MEM_ReadXDATA(CHIPIDxx + i);
 	}
 	P_SW2 = 0x00;
-}
\ No newline at end of file
+}
+#endif
diff --git a/src/fw_util.c b/src/fw_util.c
index 06a847d..97173d0 100644
--- a/src/fw_util.c
+++ b/src/fw_util.c
@@ -101,28 +101,27 @@ void UTIL_Uart1_36M864_115200_Init(void)
 }
 
 /*
-void UTIL_ItrimScan(uint8_t ircband, uint8_t *str)
+void UTIL_ItrimScan(uint8_t ircband, uint8_t vrtrim, uint8_t irtrim_limit, uint8_t *str)
 {
-	uint8_t i = 0xFF, j;
-    if (ircband & 0x01 > 0)
-    {
-        i = 0xDE;
-    }
+	uint8_t i = irtrim_limit, j;
 	do
 	{
 		j = 3;
 		do
 		{
-			SYS_SetFOSC(ircband, 0, i, j);
+			SYS_SetFOSC(ircband, vrtrim, i, j);
             SYS_Delay(1);
-			UTIL_PrintHex(IRCBAND);
-			UTIL_PrintChar(' ');
-			UTIL_PrintHex(IRTRIM);
-			UTIL_PrintChar(0x20);
-			UTIL_PrintHex(LIRTRIM);
-			UTIL_PrintChar(0x20);
-			UTIL_PrintString(str);
-			SYS_Delay(5);
+			UART1_TxHex(IRCBAND);
+			UART1_TxChar(' ');
+			UART1_TxHex(VRTRIM);
+			UART1_TxChar(' ');
+			UART1_TxHex(IRTRIM);
+			UART1_TxChar(0x20);
+			UART1_TxHex(LIRTRIM);
+			UART1_TxChar(0x20);
+			UART1_TxString(str);
+			SYS_Delay(10);
 		} while (j--);
 	} while (i--);
-}*/
\ No newline at end of file
+}
+*/
\ No newline at end of file