---
title: "We are not able to get most of the interfaces(UART0,UART1, UART2,ETHERNET) on the new W7500P (W7500P173x) chipsets"
url: "https://maker.wiznet.io/forum/12540"
markdown_url: "https://maker.wiznet.io/forum/12540/md"
type: "Forum topic"
category: "MCU & Boards"
author: "SURYA OBULA REDDY NA"
created: "2017-10-30T06:56:41+09:00"
last_activity: "2022-07-05T19:15:24+09:00"
language: "en"
views: 952
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# We are not able to get most of the interfaces(UART0,UART1, UART2,ETHERNET) on the new W7500P (W7500P173x) chipsets

## Question

Asked by SURYA OBULA REDDY NA on 2017-10-30 in MCU & Boards.

Hi to All,
Let me provide little bit more details of the problem we are facing . We are not able to get most of the interfaces(UART0,UART1, UART2,ETHERNET) on the new w7500P chipsets supplied . However all these interfaces work with the samples we procured from Mouser few weeks back. Please find attached images of the two boards **W7500P173** (chipset supplied by Wiznet ) and **W7500163X**( chipset procured from mouser). In this **W7500P163x** board works fine as expected. However **W7500P173x** board none of the interfaces work . What I see from the forum and batch codes is the one which we procured from mouser is **W7500P*R2*** release and the chipset supplied by wiznet is **W7500P*R3*** release.

We have tried the following git repository code on our boards and all the codes work in w7500163X version where as none of them work on W7500P173 version

![](https://github.githubassets.com/favicons/favicon.svg) [GitHub](https://github.com/Wiznet/W7500P)

![](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/8/82a79424ede31b71d321d66ddb0f65b02056a282.png)

### [GitHub - Wiznet/W7500P](https://github.com/Wiznet/W7500P)

Contribute to Wiznet/W7500P development by creating an account on GitHub.

![](https://github.githubassets.com/favicons/favicon.svg) [GitHub](https://github.com/Wiznet/WIZ750SR)

![](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/7/70bca430ecd249ead35d3e1dfb8d6ac08179b372.png)

### [GitHub - Wiznet/WIZ750SR: WIZnet Serial to Ethernet(S2E) module based on...](https://github.com/Wiznet/WIZ750SR)

WIZnet Serial to Ethernet(S2E) module based on W7500 chip, WIZ107/108SR S2E compatible device - GitHub - Wiznet/WIZ750SR: WIZnet Serial to Ethernet(S2E) module based on W7500 chip, WIZ107/108SR S2E...

Just a quick update to all . With further debugging we could find out that the calibration data for internal oscillator is not present in the chipsets we have received or the location of the calibration data has changed . We have made the following change in the github code and get the uart interface working in one of the IC’s we have receieved . The change we made was just to take the default value for internal oscillator trim bit and that makes the uart to work on some of the IC’s. However the ethernet interface does not work on these IC’s . Please let us know if there is any change in the code base for calibration data.

```
void SystemInit (void)
{
    uint8_t M,N,OD;
    
    (*((volatile uint32_t *)(W7500x_TRIM_BGT))) = (*((volatile uint32_t *)(W7500x_INFO_BGT)));
  //  (*((volatile uint32_t *)(W7500x_TRIM_OSC))) = (*((volatile uint32_t *)(W7500x_INFO_OSC)));

    // Set PLL input frequency
#ifdef SYSCLK_EXTERN_OSC
    CRG->PLL_IFSR = CRG_PLL_IFSR_OCLK;
#else
    CRG->PLL_IFSR = CRG_PLL_IFSR_RCLK;
#endif    
    OD = (1 << (CRG->PLL_FCR & 0x01)) * (1 << ((CRG->PLL_FCR & 0x02) >> 1));
    N = (CRG->PLL_FCR >>  8 ) & 0x3F;
    M = (CRG->PLL_FCR >> 16) & 0x3F;

#ifdef SYSCLK_EXTERN_OSC
    SystemFrequency = EXTERN_XTAL * M / N * 1 / OD;
#else
    SystemFrequency = INTERN_XTAL * M / N * 1 / OD;
#endif
}
```

Attaching the images of **W7500P163x** & **W7500P173x** calibration data

[![W7500P_R2](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/4/45f113072806e858d3fe60c44ebc9e2c12d0dc08.png) W7500P_R21366×768 118 KB](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/4/45f113072806e858d3fe60c44ebc9e2c12d0dc08.png)

**Fig** : **W7500P163x** calibration data

[![W7500x_INFO_OSC](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/9/95066ab2444b58043024fd0ed70485a65a057f3a.jpg) W7500x_INFO_OSC1366×768 439 KB](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/9/95066ab2444b58043024fd0ed70485a65a057f3a.jpg)

**Fig** : **W7500P173x** calibration data

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Source: https://maker.wiznet.io/forum/12540