# RTL8720DF 的PA\[28\] pin 要如何使用/設定?

**URL:** <https://forum.amebaiot.com/t/rtl8720df-pa-28-pin/2035>\
**Category:** Peripherals\
**Tags:** 中文, rtl872xd\
**Created:** [July 3, 2023, 9:24am UTC](https://forum.amebaiot.com/t/rtl8720df-pa-28-pin/2035 "2023-07-03T09:24:31Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**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:** [July 3, 2023, 9:24am UTC](https://forum.amebaiot.com/t/rtl8720df-pa-28-pin/2035/1 "2023-07-03T09:24:31Z")

</div>

RTL8720DF 使用PA25與PA26做USB介面使用時，PA[28] (RREF) pin要如何使用/設定? (HW 要如何接? SW/FW是否有和設定?)

---

<div class="post-metadata">

**Author:** ![M-ichae-l](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/m-ichae-l/32/33_2.png) [@M-ichae-l](https://forum.amebaiot.com/u/M-ichae-l)\
**Post date:** [August 7, 2023, 6:01am UTC](https://forum.amebaiot.com/t/rtl8720df-pa-28-pin/2035/2 "2023-08-07T06:01:24Z")

</div>

請參考 [Ameba ARDUINO – Realtek IoT/Wi-Fi MCU Solutions](https://www.amebaiot.com/en/ameba-arduino-summary/) 的 Board HDK。