diff --git a/docs/en/api-reference/peripherals/pcnt.rst b/docs/en/api-reference/peripherals/pcnt.rst
index 365d6c9f6f..a7fe57d40e 100644
--- a/docs/en/api-reference/peripherals/pcnt.rst
+++ b/docs/en/api-reference/peripherals/pcnt.rst
@@ -383,7 +383,7 @@ Kconfig Options
 Application Examples
 --------------------
 
-* Decode the quadrature signals from rotary encoder: :example:`peripherals/pcnt/rotary_encoder`.
+* :example:`peripherals/pcnt/rotary_encoder` demonstrates how to use the PCNT peripheral to decode the differential signals generated from a common rotary encoder, EC11, and how to configure the rotary encoder to wake the system from light-sleep.
 
 
 API Reference
diff --git a/docs/zh_CN/api-reference/peripherals/pcnt.rst b/docs/zh_CN/api-reference/peripherals/pcnt.rst
index 8f47f0b9b8..24dda9d52e 100644
--- a/docs/zh_CN/api-reference/peripherals/pcnt.rst
+++ b/docs/zh_CN/api-reference/peripherals/pcnt.rst
@@ -380,10 +380,10 @@ Konfig 选项 :ref:`CONFIG_PCNT_ISR_IRAM_SAFE` 可以实现以下功能：
 - :ref:`CONFIG_PCNT_ISR_IRAM_SAFE` 用于控制当缓存禁用时，默认的 ISR 句柄是否可以工作，请参考 :ref:`pcnt-iram-safe` 获取更多信息。
 - :ref:`CONFIG_PCNT_ENABLE_DEBUG_LOG` 用于使能调试日志输出，而这会增大固件二进制文件。
 
-应用实例
+应用示例
 ------------
 
-* 对旋转编码器的正交信号进行解码的实例请参考：:example:`peripherals/pcnt/rotary_encoder`。
+* :example:`peripherals/pcnt/rotary_encoder` 演示了如何使用 PCNT 外设来解码由常见的旋转编码器 EC11 生成的差分信号，以及如何配置旋转编码器将系统从 light-sleep 状态唤醒。
 
 
 API 参考