# CTS hardware flow control

**URL:** <https://forums.digi.com/t/cts-hardware-flow-control/13643>\
**Category:** XBee & XBee Gateway\
**Tags:** cts-hardware-flow-co\
**Created:** [September 24, 2014, 8:31am UTC](https://forums.digi.com/t/cts-hardware-flow-control/13643 "2014-09-24T08:31:15Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![yannis](https://avatars.discourse-cdn.com/v4/letter/y/c57346/32.png) [@yannis](https://forums.digi.com/u/yannis)\
**Post date:** [September 24, 2014, 8:31am UTC](https://forums.digi.com/t/cts-hardware-flow-control/13643/1 "2014-09-24T08:31:15Z")

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hi guys, Thanks for your response 😉  
my question is about the CTS pin in xbee 2 ZB; in my project i need to use it, but i don’t know where to connect it with pic 18f4520 (which pin), any idea ^^.

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [September 24, 2014, 4:28pm UTC](https://forums.digi.com/t/cts-hardware-flow-control/13643/2 "2014-09-24T16:28:09Z")

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CTS is an output from the radio. It would need to be connected to an Input on the UART of the Pic.

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**Author:** ![yannis](https://avatars.discourse-cdn.com/v4/letter/y/c57346/32.png) [@yannis](https://forums.digi.com/u/yannis)\
**Post date:** [September 25, 2014, 8:28am UTC](https://forums.digi.com/t/cts-hardware-flow-control/13643/3 "2014-09-25T08:28:30Z")

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thanks for your answer;  
i have just one UART in my pic; so i will not able to use it 😉  
juste for his use we d’ont need to configure any registre or interruption ?