diff --git a/docs/API_reference/zh/peripherals/misc.PWM.md b/docs/API_reference/zh/peripherals/misc.PWM.md
index a4d3b0bb2c0100127a2975d79aa8cfc8932aab72..52e8374e962b22a1675c411bf0e66f8276661ef5 100644
--- a/docs/API_reference/zh/peripherals/misc.PWM.md
+++ b/docs/API_reference/zh/peripherals/misc.PWM.md
@@ -26,7 +26,7 @@ class misc.PWM(PWM.PWMn,PWM.ABOVE_xx, highTime, cycleTime)
 
 - `cycleTime`-周期时间，int类型，说明如下：
 
-  ms级时，单位为ms<br/>us级时，单位为us<br/>ns级别：需要使用者计算<br/>             频率 = 13Mhz / cycleTime<br/>             占空比 = highTime/ cycleTime
+  ms级时，单位为ms<br/>us级时，单位为us<br/>ns级别：需要使用者计算<br/>             频率 = 1 / cycleTime<br/>             占空比 = highTime/ cycleTime
 
 > 频率支持范围：EC600N/EC800N/EG912N/EC600M/EC800M/EG810M/EC200A/EC600E/EC800E:1Hz-1MHz，EC200U/EC600U/EG915U系列：100Hz-1MHz，BG95系列：293Hz-600kHz。
 
diff --git a/docs/Application_guide/en/hardware/peripheral-interfaces/PWM.md b/docs/Application_guide/en/hardware/peripheral-interfaces/PWM.md
index df846a34c53f4629514b98a4ab42438fb9367c21..eec873be8c2bdbd5cc77251c2e68d9c5459e777f 100644
--- a/docs/Application_guide/en/hardware/peripheral-interfaces/PWM.md
+++ b/docs/Application_guide/en/hardware/peripheral-interfaces/PWM.md
@@ -43,8 +43,9 @@ The PWM is widely used in motor control, steering manipulation, breathing light
 | EG915U | 1                                       | 100Hz~1MHz      |
 | EC800M | 4                                       | 1Hz~1MHz        |
 | EG912N | 4                                       | 1Hz~1MHz        |
-| EC600E | 17（Not allowed to used synchronously） | 1Hz~1MHz        |
-| EC800E | 17（Not allowed to used synchronously） | 1Hz~1MHz        |
+| EC600E | 15（Not allowed to used synchronously） | 1Hz~1MHz        |
+| EC800E | 15（Not allowed to used synchronously） | 1Hz~1MHz        |
+| BG95   | 2                                       | 293Hz-600kHz    |
 
 ## PWM API Illustration 
 
@@ -164,4 +165,6 @@ After creating PWM object, it is available to adjust duty ratio via `PWM.open()`
 
 EC200A/EC600N/EC800N/EG912N/EC600E/EC800E: 1Hz~1MHz
 
-EC200U/EC600U/EG915U: 100Hz~1MHz
\ No newline at end of file
+EC200U/EC600U/EG915U: 100Hz~1MHz
+
+BG95：293Hz-600kHz.
\ No newline at end of file
diff --git a/docs/Application_guide/zh/hardware/peripheral-interfaces/PWM.md b/docs/Application_guide/zh/hardware/peripheral-interfaces/PWM.md
index 2bc1cf6cb008a1fb5e8a2f2aa1e7b63db85f56bd..da6c057ca6aa208b68959822bbbf6ccf96caecae 100644
--- a/docs/Application_guide/zh/hardware/peripheral-interfaces/PWM.md
+++ b/docs/Application_guide/zh/hardware/peripheral-interfaces/PWM.md
@@ -18,19 +18,20 @@ PWM 的应用范围很广，常见应用于电机控制、舵机控制、呼吸
 
 ## 各平台 PWM 说明
 
-| 平台   | 支持路数           | 频率范围   |
-| ------ | ------------------ | ---------- |
-| EC600N | 4                  | 1Hz~1MHz   |
-| EC600M | 4                  | 1Hz~1MHz   |
-| EC800N | 4                  | 1Hz~1MHz   |
-| EC600U | 1                  | 100Hz~1MHz |
-| EC200U | 1                  | 100Hz~1MHz |
-| EC200A | 3                  | 1Hz~1MHz   |
-| EG915U | 1                  | 100Hz~1MHz |
-| EC800M | 4                  | 1Hz~1MHz   |
-| EG912N | 4                  | 1Hz~1MHz   |
-| EC600E | 17（不可同时使用） | 1Hz~1MHz   |
-| EC800E | 17（不可同时使用） | 1Hz~1MHz   |
+| 平台   | 支持路数           | 频率范围     |
+| ------ | ------------------ | ------------ |
+| EC600N | 4                  | 1Hz~1MHz     |
+| EC600M | 4                  | 1Hz~1MHz     |
+| EC800N | 4                  | 1Hz~1MHz     |
+| EC600U | 1                  | 100Hz~1MHz   |
+| EC200U | 1                  | 100Hz~1MHz   |
+| EC200A | 3                  | 1Hz~1MHz     |
+| EG915U | 1                  | 100Hz~1MHz   |
+| EC800M | 4                  | 1Hz~1MHz     |
+| EG912N | 4                  | 1Hz~1MHz     |
+| EC600E | 15（不可同时使用） | 1Hz~1MHz     |
+| EC800E | 15（不可同时使用） | 1Hz~1MHz     |
+| BG95   | 2                  | 293Hz-600kHz |
 
 ## PWM API 说明
 
@@ -142,4 +143,4 @@ while True:
 
 ### 2.PWM 输出频率范围
 
-EC200A/EC600N/EC800N/EG912N/EC600E/EC800E 支持 1Hz-1MHz，EC200U/EC600U/EG915U 支持 100Hz-1MHz。
+EC200A/EC600N/EC800N/EG912N/EC600E/EC800E 支持 1Hz-1MHz，EC200U/EC600U/EG915U 支持 100Hz-1MHz，BG95支持293Hz-600kHz。