# Ameba RTL8722DM How to turn on USB host

**URL:** <https://forum.amebaiot.com/t/ameba-rtl8722dm-how-to-turn-on-usb-host/1304>\
**Category:** USB\
**Tags:** rtl872xd\
**Created:** [June 17, 2022, 2:42pm UTC](https://forum.amebaiot.com/t/ameba-rtl8722dm-how-to-turn-on-usb-host/1304 "2022-06-17T14:42:14Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![jimhuang0708](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/jimhuang0708/32/1032_2.png) [@jimhuang0708](https://forum.amebaiot.com/u/jimhuang0708)\
**Post date:** [June 17, 2022, 2:42pm UTC](https://forum.amebaiot.com/t/ameba-rtl8722dm-how-to-turn-on-usb-host/1304/1 "2022-06-17T14:42:14Z")

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翻閱整個SDK似乎所有有關於usb 的 source/header 都是空的?

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**Author:** ![wyy](https://avatars.discourse-cdn.com/v4/letter/w/bc8723/32.png) [@wyy](https://forum.amebaiot.com/u/wyy)\
**Post date:** [June 20, 2022, 2:43am UTC](https://forum.amebaiot.com/t/ameba-rtl8722dm-how-to-turn-on-usb-host/1304/2 "2022-06-20T02:43:07Z")

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github 上的 SDK 现在并不包含 USB 功能，需要用的话，可以考虑签 NDA 拿 SDK

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**Author:** ![jimhuang0708](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/jimhuang0708/32/1032_2.png) [@jimhuang0708](https://forum.amebaiot.com/u/jimhuang0708)\
**Post date:** [June 20, 2022, 4:04am UTC](https://forum.amebaiot.com/t/ameba-rtl8722dm-how-to-turn-on-usb-host/1304/3 "2022-06-20T04:04:49Z")

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Ok,I got it . Thanks

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**Author:** ![xidameng](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/xidameng/32/18_2.png) [@xidameng](https://forum.amebaiot.com/u/xidameng)\
**Post date:** [June 21, 2022, 2:02am UTC](https://forum.amebaiot.com/t/ameba-rtl8722dm-how-to-turn-on-usb-host/1304/4 "2022-06-21T02:02:11Z")

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@jimhuang0708  
NDA SDK的獲取方法可以看這裏，  
[https://forum.amebaiot.com/t/ic-nda-sdk/1038](https://forum.amebaiot.com/t/ic-nda-sdk/1038)

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**Author:** ![iron](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/iron/32/1259_2.png) [@iron](https://forum.amebaiot.com/u/iron)\
**Post date:** [December 30, 2022, 7:03am UTC](https://forum.amebaiot.com/t/ameba-rtl8722dm-how-to-turn-on-usb-host/1304/5 "2022-12-30T07:03:26Z")

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請問RTL87210DF目前可以支援做USB Host 來接外部USB 裝置(UART嗎?)  
(我知道RTL87210DF有UART，但要接的裝置是USB介面。所以需要能做USB Host角色來接此USB device)