update en/device-dev/driver/driver-platform-rtc-des.md.

Signed-off-by: Nking_he <6384784@qq.com>

en/device-dev/driver/driver-platform-rtc-des.md

@@ -95,7 +95,7 @@ The real-time clock \(RTC\) driver provides precise real time for the operating
 </tbody>
 </table>
 
->![](../public_sys-resources/icon-note.gif) **NOTE:** 
+>![](../public_sys-resources/icon-note.gif) **NOTE**<br>
 >All functions provided in this document can be called only in kernel mode.
 
 ## Usage Guidelines<a name="section20636145604113"></a>
@@ -113,7 +113,7 @@ During the OS startup, the HDF loads the RTC driver based on the configuration f
 
 After the RTC driver is loaded, you can use the API provided by the HDF and call APIs of the RTC driver.
 
->![](../public_sys-resources/icon-note.gif) **NOTE:** 
+>![](../public_sys-resources/icon-note.gif) **NOTE**<br>
 >Currently, only one RTC device is supported in the OS.
 
 DevHandle RtcOpen\(void\);
@@ -354,7 +354,7 @@ int32\_t RtcWriteTime\(DevHandle handle, struct RtcTime \*time\);
 </tbody>
 </table>
 
->![](../public_sys-resources/icon-note.gif) **NOTE:** 
+>![](../public_sys-resources/icon-note.gif) **NOTE**<br>
 >The RTC start time is 1970/01/01 Thursday 00:00:00 \(UTC\). The maximum value of **year** must be set based on the requirements specified in the product manual of the in-use component. You do not need to configure the day of the week.
 
 ```
@@ -481,7 +481,7 @@ int32\_t RtcWriteAlarm\(DevHandle handle, enum RtcAlarmIndex  alarmIndex, struct
 </tbody>
 </table>
 
->![](../public_sys-resources/icon-note.gif) **NOTE:** 
+>![](../public_sys-resources/icon-note.gif) **NOTE**<br>
 >The RTC start time is 1970/01/01 Thursday 00:00:00 \(UTC\). The maximum value of **year** must be set based on the requirements specified in the product manual of the in-use component. You do not need to configure the day of the week.
 
 ```
@@ -927,4 +927,3 @@ void RtcTestSample(void)
     RtcClose(handle);
 }
 ```
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