diff --git a/en/device-dev/driver/driver-platform-i3c-des.md b/en/device-dev/driver/driver-platform-i3c-des.md
index 6775bb07132d94d009399a0a72fba764459a59db..9afb5b65f8b5119b66878bb74f00471ed5590083 100644
--- a/en/device-dev/driver/driver-platform-i3c-des.md
+++ b/en/device-dev/driver/driver-platform-i3c-des.md
@@ -4,18 +4,22 @@
## Overview
The Improved Inter-Integrated Circuit (I3C) is a simple and cost-efficient bidirectional 2-wire synchronous serial bus protocol developed by the Mobile Industry Processor Interface (MIPI) Alliance.
+
I3C is backward compatible with legacy Inter-Integrated Circuit (I2C) devices. Moreover, it provides the in-band interrupt (IBI) function and supports hot-join of I3C devices. This eliminates the need for adding an extra interrupt line to implement interrupts in I2C.
+
The I2C device, I3C slave device, and I3C secondary master device can coexist on the I3C bus.
+
The I3C APIs provide a set of common functions for I3C transfer, including:
- - Opening and closing an I3C controller.
- - Obtaining and setting I3C controller parameters.
- - Performing customized I3C message transfer by using a message array.
- - Requesting and releasing an IBI.
+- Opening and closing an I3C controller.
+- Obtaining and setting I3C controller parameters.
+- Performing customized I3C message transfer by using a message array.
+- Requesting and releasing an IBI.
+
[Figure 1](#fig1) shows the I3C physical connection.
- **Figure 1** I3C physical connection
- 
+**Figure 1** I3C physical connection
+
## Available APIs
@@ -223,7 +227,7 @@ if (ret != 2) {
}
```
-> **Caution**
+> **Caution**
>- The device address in the **I3cMsg** structure does not contain the read/write flag bit. The read/write information is passed by the read/write control bit in the member variable **flags**.
>- The **I3cTransfer()** function does not limit the number of message structures or the length of data in each message structure. The I3C controller determines these two parameters.
>- Using **I3cTransfer()** may cause the system to sleep. Do not call it in the interrupt context.