# Zcu111 - MGT SI570 Clock - from PYNQ

**URL:** <https://discuss.pynq.io/t/zcu111-mgt-si570-clock-from-pynq/2727>\
**Category:** Support\
**Created:** [June 7, 2021, 10:51am UTC](https://discuss.pynq.io/t/zcu111-mgt-si570-clock-from-pynq/2727 "2021-06-07T10:51:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![shalom](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/shalom/32/1308_2.png) [@shalom](https://discuss.pynq.io/u/shalom)\
**Post date:** [June 7, 2021, 10:51am UTC](https://discuss.pynq.io/t/zcu111-mgt-si570-clock-from-pynq/2727/1 "2021-06-07T10:51:42Z")

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Hello

I am using the zcu111 board , with Pynq 2.5  
Is there any possibility to changed the clock frequency of the MGT SI570 Clock that is connected to the PL ?  
The port is : USER\_MGT\_SI570\_CLOCK\_C\_P

Thanks  
Shal