diff --git a/en/peripherals/machine.UART.md b/en/peripherals/machine.UART.md
index c8c714f6f62bc421b8449e049c72dc59d045aa03..dff0cc2fcd59b49f5c37beb413e2b74e07ba8524 100644
--- a/en/peripherals/machine.UART.md
+++ b/en/peripherals/machine.UART.md
@@ -23,7 +23,7 @@ This class transmits data through the UART.
 </ul>
 </div>
 
-<div class="EC200A|UC200A|EC800N|BC25PA|EC600M|EC800M|EG810M|EG912N|EC600E|EC800E|EC600G|EC800G|EC600K|EG800K|EG800P|BC92|EC800Z|BC32|FCM360W|FCM362K|EC800K|EG912U">
+<div class="EC200A|UC200A|EC800N|BC25PA|EC600M|EC800M|EG810M|EG912N|EC600E|EC800E|EC600G|EC800G|EC600K|EG800K|EG800P|BC92|BC32|FCM360W|FCM362K|EC800K|EG912U">
 <pre class="language-python"><code class="language-python">class machine.UART(UART.UARTn, baudrate, databits, parity, stopbits, flowctl)
 </code></pre>
 <p><strong>Parametric Description:</strong></p>
@@ -39,6 +39,22 @@ This class transmits data through the UART.
 </ul>
 </div>
 
+<div class="EC800Z">
+<pre class="language-python"><code class="language-python">class machine.UART(UART.UARTn, baudrate, databits, parity, stopbits, flowctl)
+</code></pre>
+<p><strong>Parametric Description:</strong></p>
+<ul>
+<li><p><code>UARTn</code> - UART number, int type, UARTn description is as follows:<br/><code>UART0</code> - DEBUG PORT <br/><code>UART1</code> - BT PORT <br/><code>UART2</code> - MAIN PORT <br/><code>UART3</code> - USB CDC PORT <br/></p>
+</li>
+<li><p><code>baudratec</code> - Baud rate, int type, supports common baud rates such as<code>4800</code>、<code>9600</code>、<code>19200</code>、<code>38400</code>、<code>57600</code>、<code>115200</code>、<code>230400</code>.<br/></p></li>
+<li><p><code>databits</code> - Data bits [8], int type.<br/></p></li>
+<li><p><code>parity</code> - Parity (0-None, 1-even, 2-odd), int type.<br/></p></li>
+<li><p><code>stopbits</code> - Stop bit [1 ~ 2], int type.<br/></p></li>
+<li><p><code>flowctl</code> - Hardware control flow (0-FC_NONE, 1-FC_HW), int type.<br/></p>
+</li>
+</ul>
+</div>
+
 <div class="EG800K|EC800K">
 <pre class="language-python"><code class="language-python">class machine.UART(UART.UARTn, baudrate, databits, parity, stopbits, flowctl, [group])
 </code></pre>
diff --git a/zh/peripherals/machine.UART.md b/zh/peripherals/machine.UART.md
index 7244c3603c262326c66854e3c52b21215e600719..29b025638cde24d8d6d3e395b1158670cbfed17b 100644
--- a/zh/peripherals/machine.UART.md
+++ b/zh/peripherals/machine.UART.md
@@ -55,7 +55,7 @@
 </ul>
 </div>
 
-<div class="EC200A|UC200A|EC800N|BC25PA|EC600M|EC800M|EG810M|EG912N|EC600E|EC800E|EC600G|EC600K|EG800P|BC92|EC800Z|BC32|FCM360W|FCM362K|EG912U">
+<div class="EC200A|UC200A|EC800N|BC25PA|EC600M|EC800M|EG810M|EG912N|EC600E|EC800E|EC600G|EC600K|EG800P|BC92|BC32|FCM360W|FCM362K|EG912U">
 <pre class="language-python"><code class="language-python">class machine.UART(UART.UARTn, baudrate, databits, parity, stopbits, flowctl)
 </code></pre>
 <p><strong>参数描述：</strong></p>
@@ -71,6 +71,22 @@
 </ul>
 </div>
 
+<div class="EC800Z">
+<pre class="language-python"><code class="language-python">class machine.UART(UART.UARTn, baudrate, databits, parity, stopbits, flowctl)
+</code></pre>
+<p><strong>参数描述：</strong></p>
+<ul>
+<li><p><code>UARTn</code> - UART编号，int类型，UARTn说明如下：<br/><code>UART0</code> - DEBUG PORT <br/><code>UART1</code> - BT PORT <br/><code>UART2</code> - MAIN PORT <br/><code>UART3</code> - USB CDC PORT <br/></p>
+</li>
+<li><p><code>baudratec</code> - 波特率，int类型，支持常用波特率，如<code>4800</code>、<code>9600</code>、<code>19200</code>、<code>38400</code>、<code>57600</code>、<code>115200</code>、<code>230400</code>等;<br/></p></li>
+<li><p><code>databits</code> - 数据位[8]，int类型。<br/></p></li>
+<li><p><code>parity</code> - 奇偶校验(0 – NONE，1 – EVEN，2 – ODD)，int类型。<br/></p></li>
+<li><p><code>stopbits</code> - 停止位[1 ~ 2]，int类型。<br/></p></li>
+<li><p><code>flowctl</code> - 硬件控制流(0 – FC_NONE， 1 – FC_HW)，int类型。<br/></p>
+</li>
+</ul>
+</div>
+
 <div class="EC800K|EG800K">
 <pre class="language-python"><code class="language-python">class machine.UART(UART.UARTn, baudrate, databits, parity, stopbits, flowctl, [group])
 </code></pre>