---
title: "UART0 and UART1 Gpio's in Polling UART Example"
url: "https://maker.wiznet.io/forum/12457"
markdown_url: "https://maker.wiznet.io/forum/12457/md"
type: "Forum topic"
category: "MCU & Boards"
author: "SURYA OBULA REDDY NA"
created: "2017-09-04T06:41:08+09:00"
last_activity: "2018-06-28T06:09:20+09:00"
language: "en"
views: 845
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# UART0 and UART1 Gpio's in Polling UART Example

## Question

Asked by SURYA OBULA REDDY NA on 2017-09-04 in MCU & Boards.

UART0 and UART1 Gpio’s are not configured in Polling UART Example Code…

## Replies

### Reply 1 by Hooligan0, 2017-09-04

Hi,

You can use UART0 and UART1 with the default (reset) configuration of GPIOs. Look into AFC peripheral configuration [1] [2] for the default mapping. As you can see into the table Uart0 is available on PA13 / PA14 and UART1 is available on PC02 / PC03.

If you want to connect UART signals to other pins you can change AFC config but this is not necessary for Polling example

[1] <http://wizwiki.net/wiki/doku.php?id=products:w7500:peripherals:afc>
[2] <http://wizwiki.net/wiki/lib/exe/fetch.php?media=products:w7500:w7500_ds_v112.pdf> page 42

---

Source: https://maker.wiznet.io/forum/12457