diff --git a/docs/Product/ioNIC/W55RP20/W55RP20-S2E/mac_address-write-guide-en.md b/docs/Product/ioNIC/W55RP20/W55RP20-S2E/mac_address-write-guide-en.md
index 7a283cf537..ad1a32b8f4 100644
--- a/docs/Product/ioNIC/W55RP20/W55RP20-S2E/mac_address-write-guide-en.md
+++ b/docs/Product/ioNIC/W55RP20/W55RP20-S2E/mac_address-write-guide-en.md
@@ -12,9 +12,10 @@ date: 2024-10-23
 
 ## MAC Address write overview
 
-A factory reset will return the settings on the **W232N** to their factory state.
 
 
+The MAC address is stored in different memory address from the firmware area of the W55RP20-S2E.<br />Therefore, reflashing the W55RP20-S2E firmware will not erase the MAC address input if only the firmware area is overwritten.
+
 
 -----
 
@@ -22,76 +23,86 @@ A factory reset will return the settings on the **W232N** to their factory state
 
 ## Required Hardware and Software
 
-
-<!--
 ### Hardware
 
-  - W232N
-  - 5~36V Power adapter
+  - Devices with W55RP20-S2E firmware downloaded
   - Cables (Ethernet / Serial)
 
-
 ### Software
 
-  - WIZnet S2E Configuration Tool
-	- [Download the Latest Version](https://github.com/Wiznet/WIZnet-S2E-Tool-GUI/releases/tag/V1.5.0)
-    - [Download the Older Versions](https://github.com/Wiznet/WIZnet-S2E-Tool-GUI/releases)
-    - [GitHub Repository](https://github.com/Wiznet/WIZnet-S2E-Tool-GUI)
+  - [WIZMacTool](https://docs.wiznet.io/img/products/wiz750sr/developers/restore-mac/wizmactool_v20151127.zip)
+  - [WIZnet S2E Configuration Tool](https://github.com/Wiznet/WIZnet-S2E-Tool-GUI/releases)
 
 
------
-## How to factory reset the W232N
-
-There are two ways to perform a W232N factory reset.
+## How to write MAC Address
 
-- [Using Config-Tool](#Using-Config-Tool)
-- [Using Factory reset switch](#Using-Factory-reset-switch)
+There are two ways to write MAC Address
 
-## Using Config Tool
+- [Using WIZMacTool](#Using-WIZMacTool)
+- [Using Serial Command](#Using-Serial-Command)
 
 
-### Step 1: Run Config-tool
+## Using WIZMacTool
 
-Run installed **'Config-tool'**
+### Step 1: Connect UART1 of W55RP20-S2E to PC
 
+At this step, you will need a separate UART to USB module.<br />
+<img src="/img/products/w55rp20-s2e/usb-connect.png" width="300" />
 
-### Step 2: Select ⑦Factory Rest from the top icon menu
 
-<img src="/img/products/s2e_module/wiz5xxsr-rp/configuration_tool_manual/menu_icons.png" width="400" /> 
+### Step 2: Run WIZMacTool
 
+Run **WIZMacTool** and connect the COM port to which the W55RP20-S2E is connected.<br />
+<img src="/img/products/w55rp20-s2e/mac-tool1.png" width="500" />
 
-### step 3: Do factory reset
+### Step 3: Check INPUT MAC
 
-<img src="/img/products/w232n/config-fact.png" width="500" /> 
+After connecting the COM port of the W55RP20-S2E to WIZMacTool, reset the W55RP20-S2E and verify that "INPUT MAC" is displayed in WIZMacTool.<br />
+<img src="/img/products/w55rp20-s2e/mac-tool2.png" width="500" />
 
-- select **Yes** 
+### Step 4: Write MAC Address
 
+Set up WIZMacTool as shown in the picture, enter the MAC address you wish to input, and click Write.<br />
+<img src="/img/products/w55rp20-s2e/mac-tool4.png" width="500" />
 
-### Step 4: Done
+If the MAC address is successfully written, the W55RP20-S2E will respond with the letter R and the MAC address you entered.<br />
+<img src="/img/products/w55rp20-s2e/mac-tool5.png" width="500" />
+<br />
+For convenience when entering consecutive MAC addresses, WIZMacTool increments the MAC address by 1 after clicking Write MAC.
 
-<img src="/img/products/w232n/config-fact-ok.png" width="500" /> 
+### Step 5: Done
 
-- If the factory reset completed successfully, you'll see a completion notification.
+You can verify the changed MAC address by searching with the config-tool <br />
+<img src="/img/products/w55rp20-s2e/config-mac.png" width="500" /> <br />
+or checking it via AT commands.<br />
+<img src="/img/products/w55rp20-s2e/at-mac.png" width="500" /> <br />
 
 
-## Using factory reset switch
+## Using Serial Command
 
-### Step 1: Remove the top case
+### Step 1: Connect UART1 of W55RP20-S2E to PC
 
-<img src="/img/products/w232n/Screw.png" width="200" />
+At this step, you will need a separate UART to USB module.<br />
+<img src="/img/products/w55rp20-s2e/usb-connect.png" width="300" />
 
-- Remove the bolts on either side of the device to remove the top case
+### Step 2: Run serial program
 
-### Step 2: Click the Factory Reset switch
+Open the COM port connected to the W55RP20-S2E using a serial monitor program. In this manual, we used an open-source tool named Hercules.<br />
+<img src="/img/products/w55rp20-s2e/hercul-open.png" width="300" />
 
-<img src="/img/products/w232n/fact_rst.png" width="400" />
+### Step 3: Check INPUT MAC
 
-- Press and hold the factory reset switch for 5 seconds with the W232N booting normally.
-- The RUN, LINK, and TCP LEDs blink twice rapidly.
+After the COM port of the W55RP20-S2E is opened in the serial program, reset the W55RP20-S2E and verify that "INPUT MAC" is displayed.<br />
+<img src="/img/products/w55rp20-s2e/hercul-input.png" width="300" />
 
-### Step 3: Done
+### Step 4: Write MAC Address
 
-- Use Config-tool to verify that it initialized properly.
+Send the character 'S' followed by the MAC address you wish to input. The W55RP20-S2E will respond with the character 'R' and the MAC address you sent, indicating that the MAC address has been successfully written.<br />
+<img src="/img/products/w55rp20-s2e/hercul-write-mac.png" width="300" />
 
+### Step 5: Done
 
--->
\ No newline at end of file
+You can verify the changed MAC address by searching with the config-tool <br />
+<img src="/img/products/w55rp20-s2e/config-mac.png" width="500" /> <br />
+or checking it via AT commands.<br />
+<img src="/img/products/w55rp20-s2e/at-mac.png" width="500" /> <br />
\ No newline at end of file
diff --git a/docs/Product/ioNIC/W55RP20/W55RP20-S2E/overview-[EN].md b/docs/Product/ioNIC/W55RP20/W55RP20-S2E/overview-[EN].md
index 42e80f8545..7be4fb98cd 100644
--- a/docs/Product/ioNIC/W55RP20/W55RP20-S2E/overview-[EN].md
+++ b/docs/Product/ioNIC/W55RP20/W55RP20-S2E/overview-[EN].md
@@ -47,7 +47,7 @@ The **W55RP20-S2E** is a pre-programmed product with an Serial to Ethernet FW an
 
 ### Pin Assignment
 
-<img src="/img/products/w55rp20-evb-pico/w55rp20-s2e-pinmap.png" width="600" />
+<img src="/img/products/w55rp20-s2e/w55rp20-s2e-pinmap.png" width="600" />
 
 | Pin Number |    Signal   | Description                                                  |
 |------------|-------------|------------------------------------------------------------|
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