# \#rcm-4000

**URL:** https://forums.digi.com/tag/rcm-4000/801.md

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## [How can we interface an RCM4000  with an external device like FPGA?](https://forums.digi.com/t/how-can-we-interface-an-rcm4000-with-an-external-device-like-fpga/12200)

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**Author:** [@AISWARYA\_RAJ](https://forums.digi.com/u/AISWARYA_RAJ)\
**Replies:** 1\
**Last updated:** [April 1, 2016, 12:01pm UTC](https://forums.digi.com/t/how-can-we-interface-an-rcm4000-with-an-external-device-like-fpga/12200 "2016-04-01T12:01:21Z")

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RCM4000 has only IORD and IOWR pins.How can I initiate the interfacing through these pins .How do we specify address bits? I want to assign Chip Select also?

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## [Difference between slave ports and auxilliary I/O bus?](https://forums.digi.com/t/difference-between-slave-ports-and-auxilliary-i-o-bus/12204)

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**Author:** [@AISWARYA\_RAJ](https://forums.digi.com/u/AISWARYA_RAJ)\
**Replies:** 1\
**Last updated:** [January 20, 2014, 11:11am UTC](https://forums.digi.com/t/difference-between-slave-ports-and-auxilliary-i-o-bus/12204 "2014-01-20T11:11:42Z")

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## [Can anyone provide the commands to interface the rabbit 4000 processor with an external device?](https://forums.digi.com/t/can-anyone-provide-the-commands-to-interface-the-rabbit-4000-processor-with-an-external-device/11974)

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**Author:** [@AISWARYA\_RAJ](https://forums.digi.com/u/AISWARYA_RAJ)\
**Replies:** 4\
**Last updated:** [September 25, 2013, 5:18am UTC](https://forums.digi.com/t/can-anyone-provide-the-commands-to-interface-the-rabbit-4000-processor-with-an-external-device/11974 "2013-09-25T05:18:30Z")

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