# /RESET and /RESET\_IN on RCM5700

**URL:** <https://forums.digi.com/t/reset-and-reset-in-on-rcm5700/9370>\
**Category:** Rabbit\
**Created:** [July 23, 2009, 2:10pm UTC](https://forums.digi.com/t/reset-and-reset-in-on-rcm5700/9370 "2009-07-23T14:10:33Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Nicola](https://avatars.discourse-cdn.com/v4/letter/n/41988e/32.png) [@Nicola](https://forums.digi.com/u/Nicola)\
**Post date:** [July 23, 2009, 2:10pm UTC](https://forums.digi.com/t/reset-and-reset-in-on-rcm5700/9370/1 "2009-07-23T14:10:33Z")

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Hi All,

I am sorry if the following is a stupid question but I am not sure.

On the RCM5700 module there are /RESET (pin28) and /RESET\_IN (pin 16) pins. Tooking a look at the electrical scheme of the module it seems that /RESET is the output pin of the reset generator placed on the module and /RESET\_IN is the input.

On my application I think to use /RESET like the reset system and let /RESET\_IN pin floating.

What do you think about?

Thank you in advance.

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**Author:** ![sgt](https://avatars.discourse-cdn.com/v4/letter/s/df705f/32.png) [@sgt](https://forums.digi.com/u/sgt)\
**Post date:** [July 23, 2009, 4:43pm UTC](https://forums.digi.com/t/reset-and-reset-in-on-rcm5700/9370/2 "2009-07-23T16:43:43Z")

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Depends on what you’re trying to do… If you want to force a reset, pull the /RESET\_IN low. If you want to know when the system has been reset (to initialize your hardware), then use /RESET.

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**Author:** ![Nicola](https://avatars.discourse-cdn.com/v4/letter/n/41988e/32.png) [@Nicola](https://forums.digi.com/u/Nicola)\
**Post date:** [July 23, 2009, 4:52pm UTC](https://forums.digi.com/t/reset-and-reset-in-on-rcm5700/9370/3 "2009-07-23T16:52:45Z")

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> [@sgt;4063](#):
>
> Depends on what you’re trying to do… If you want to force a reset, pull the /RESET\_IN low. If you want to know when the system has been reset (to initialize your hardware), then use /RESET.

sgt,

I want to provide a reset signal to the MCU.  
So, why should I use the reset generator?

On my system I tie the /RESET signal high (using 1K resistor) and then I use  
a switch to set low the line when I want a reset.

Is it?

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<div class="post-metadata">

**Author:** ![sgt](https://avatars.discourse-cdn.com/v4/letter/s/df705f/32.png) [@sgt](https://forums.digi.com/u/sgt)\
**Post date:** [July 24, 2009, 4:52am UTC](https://forums.digi.com/t/reset-and-reset-in-on-rcm5700/9370/4 "2009-07-24T04:52:37Z")

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The RCM5700 uses a MIC811 reset generator. This has active outputs and does not require a pullup resistor.

The main reason for using the reset generator is that it will give you a guaranteed minimum reset pulse width (140 ms), which will eliminate someproblems you might see with switch bounce.

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<div class="post-metadata">

**Author:** ![Nicola](https://avatars.discourse-cdn.com/v4/letter/n/41988e/32.png) [@Nicola](https://forums.digi.com/u/Nicola)\
**Post date:** [July 24, 2009, 2:39pm UTC](https://forums.digi.com/t/reset-and-reset-in-on-rcm5700/9370/5 "2009-07-24T14:39:28Z")

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Thank you for the info. I am performing some tests on this reset issue but there is something strange.

I will let you know if I found something.

Thank you.