diff --git a/README.md b/README.md
index ec0077cb..5f5e07d9 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,7 @@ CherryUSB Device Stack resource usage (GCC 10.2 with -O2):
 |usbd_audio.c   |  ~1500          | 0                         | 0            | 0                |
 |usbd_video.c   |  ~3700          | 0                         | 132 * bus    | 0                |
 |usbd_rndis.c   |  ~4000          | 2 * 1580(default)+156+8   | 80           | 0                |
+|usbd_cdc_ecm.c |  ~1200          | 2 * 1514(default)+16      | 42           | 0                |
 |usbd_mtp.c     |  ~9000          | 2048(default)+128         | sizeof(struct mtp_object) * n| 0 |
 
 ## Host Stack Overview
diff --git a/README_zh.md b/README_zh.md
index 11ca4af3..808ad57a 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -89,6 +89,7 @@ CherryUSB Device 协议栈资源占用说明（GCC 10.2 with -O2）：
 |usbd_audio.c   |  ~1500          | 0                         | 0            | 0                |
 |usbd_video.c   |  ~3700          | 0                         | 132 * bus    | 0                |
 |usbd_rndis.c   |  ~4000          | 2 * 1580(default)+156+8   | 80           | 0                |
+|usbd_cdc_ecm.c |  ~1200          | 2 * 1514(default)+16      | 42           | 0                |
 |usbd_mtp.c     |  ~9000          | 2048(default)+128         | sizeof(struct mtp_object) * n| 0 |
 
 ## Host 协议栈简介
diff --git a/docs/source/version.rst b/docs/source/version.rst
index 813189cb..9e38d789 100644
--- a/docs/source/version.rst
+++ b/docs/source/version.rst
@@ -118,4 +118,5 @@ v1.5.0
 - ch32 device iso 更新
 - cmake，kconfig 更新
 - 使用 USB_ASSERT_MSG 对部分代码检查
-- N32H4，mm32f5 支持
\ No newline at end of file
+- N32H4，mm32f5 支持
+- **重构 device mtp 驱动（收费使用）**
\ No newline at end of file