# RCM3700 I/O V.

**URL:** <https://forums.digi.com/t/rcm3700-i-o-v/9525>\
**Category:** Rabbit\
**Created:** [April 27, 2007, 1:58am UTC](https://forums.digi.com/t/rcm3700-i-o-v/9525 "2007-04-27T01:58:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![AndresGM](https://avatars.discourse-cdn.com/v4/letter/a/9d8465/32.png) [@AndresGM](https://forums.digi.com/u/AndresGM)\
**Post date:** [April 27, 2007, 1:58am UTC](https://forums.digi.com/t/rcm3700-i-o-v/9525/1 "2007-04-27T01:58:15Z")

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Hi everyone

I�m new to all of this, so excuse me if some of this questions sound a bit stupid 😉

Right now I�m using a RCM3700 mounted on a custom circuit ( nothing complicated, just a few PNPs, capacitors, etc ) and I would like to know the Volts that the RCM3700 provides in each of its outputs and the Volts that it needs in its inputs to read a “1”.

I mean :

If I have this expression, for example BitRdPortI(PGDR,6)==1 how many Volts do I need in Port G 6 to make it “true”?

Thanks in advance and sorry if I made any mistakes with the language! 🙂

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**Author:** ![seulater](https://avatars.discourse-cdn.com/v4/letter/s/54ee81/32.png) [@seulater](https://forums.digi.com/u/seulater)\
**Post date:** [April 30, 2007, 1:43pm UTC](https://forums.digi.com/t/rcm3700-i-o-v/9525/2 "2007-04-30T13:43:26Z")

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3.3v is a typical “1” state, however most Rabbit 3000 input pins are 5 V tolerant.