# Is there any need to connect the clock pins together of the RCMs for external interfacing of two RCM4000 modules?

**URL:** <https://forums.digi.com/t/is-there-any-need-to-connect-the-clock-pins-together-of-the-rcms-for-external-interfacing-of-two-rcm4000-modules/12919>\
**Category:** Rabbit Software\
**Tags:** clock, rcm4000\
**Created:** [May 7, 2014, 8:15am UTC](https://forums.digi.com/t/is-there-any-need-to-connect-the-clock-pins-together-of-the-rcms-for-external-interfacing-of-two-rcm4000-modules/12919 "2014-05-07T08:15:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![AISWARYA\_RAJ](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@AISWARYA\_RAJ](https://forums.digi.com/u/AISWARYA_RAJ)\
**Post date:** [May 7, 2014, 8:15am UTC](https://forums.digi.com/t/is-there-any-need-to-connect-the-clock-pins-together-of-the-rcms-for-external-interfacing-of-two-rcm4000-modules/12919/1 "2014-05-07T08:15:56Z")

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**Author:** ![cpigilam](https://avatars.discourse-cdn.com/v4/letter/c/fbc32d/32.png) [@cpigilam](https://forums.digi.com/u/cpigilam)\
**Post date:** [May 8, 2014, 6:38am UTC](https://forums.digi.com/t/is-there-any-need-to-connect-the-clock-pins-together-of-the-rcms-for-external-interfacing-of-two-rcm4000-modules/12919/2 "2014-05-08T06:38:48Z")

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Hello,It seems like all slave port operations are based on the processor clock.Yo do not need to connect any extra clock pin. Did you go through the below document?

[http://ftp1.digi.com/support/documentation/019-0152\_N.pdf](http://ftp1.digi.com/support/documentation/019-0152_N.pdf)