Update W55RP20-S2E doc

docs/Product/ioNIC/W55RP20/W55RP20-S2E/command-manual-en.md

@@ -58,13 +58,13 @@ You can use either of the two methods below to enter serial command mode.
 
 **1. Enter command mode using hardware trigger pin**
 
-  - Use the AT_MODE pin of the W55RP20-S2E to enter command mode.
+  - Use the HW_TRIG pin of the W55RP20-S2E to enter command mode.
   - Upon turning the power on, check the pin to enter command mode. Use the trigger pin to re-enter the command mode when rebooting.
   - The trigger pin should be pull-up, and operates as low active.
   - This method is used when users wish to change settings while the product operation is initiated.
 
 ```
-  - Set the hardware AT_MODE pin to Low.
+  - Set the hardware HW_TRIG pin to Low.
 
   - Power on the W55RP20-S2E.
     · When operating in serial command mode, users can check the following message via Debug UART port.

docs/Product/ioNIC/W55RP20/W55RP20-S2E/overview-en.md

@@ -64,15 +64,15 @@ The **W55RP20-S2E** is a pre-programmed product with an Serial to Ethernet FW an
 | 9          | UART1_TX    | Serial data TX           |
 | 10         | UART1_RX    | Serial data RX         |
 | 11         | UART1_CTS   | Clear To Send (RX)<br />Associated with the RTS of the connected device and is used to transmit data when the RTS sent from that pin is low.                                                                                                                                            |
-| 12         | UART1_RTS   | Request To Send<br />Connects with the CTS of the connected equipment and sends a low signal when the W55RP20-S2E is in a state where it can receive data.                                                                                                                              |
+| 12         | UART1_RTS   | Request To Send<br />Connects with the CTS of the connected equipment and sends a low signal when the W55RP20-S2E is in a state where it can receive data.<br /><br />When 485/422 selected by UART_IF_SEL pin, this pin act as 485/422 select pin. <br />NC : 485<br />Low : 422<br /> |
 | 13         | IOVDD       | Digital IO Supply<br />Power supply for digital GPIOs, nominal voltage 3.3V                                                                                                                                                                                                             |
 | 14         | DTR         | Data Terminal Ready (TX)<br />Connected to the device's DSR pin to show that it is ready to communicate.                                                                                                                                                                                |
 | 15         | DSR         | Data Set Ready (RX)<br />Connected to the device's DTR pin to indicate that it is ready for communication.                                                                                                                                                                              |
 | 16         | LINK_STATUS | Link Status signal<br />High : Link<br />Low : UnLink       |
 | 17         | TCP_STATUS  | TCP Connection<br />High : Connect<br />Low : Disconnect        |
-| 18         | RESERVED    | RESERVED PIN                                               |
+| 18         | UART_IF_SEL | UART Interface select <br /> High : 485/422<br />Low or NC : TTL/232|
 | 19         | RESERVED    | RESERVED PIN                    |
-| 20         | AT_MODE     | AT Command mode pin<br />High : Gateway Mode (default)<br />Low : AT Command Mode<br />Changes will be reflected after reset                                                                                                                                                                |
+| 20         | HW_TRIG     | AT Command mode pin<br />High : Gateway Mode (default)<br />Low : AT Command Mode<br />Changes will be reflected after reset                                                                                                                                                                |
 | 21         | BOOT_MODE   | Boot Mode pin<br />Low : Enter W55RP20-S2E BOOT mode<br />Changes will be reflected after reset                                                                                                                                                                                           |
 | 22         | TESTEN      | Factory test mode pin<br />Tie to GND.                      |
 | 23         | XIN         | Crystal input/output<br />Connect a crystal to RP2040’s crystal oscillator. XIN can also be used as a single-ended CMOS clock input, with XOUT disconnected. The USB bootloader requires a 12MHz crystal or 12MHz clock input.                                                          |