# \#sf\_spi

**URL:** https://forums.digi.com/tag/sf-spi/2985.md

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## [SFLASH.LIB does not support RCM3305 with the AT45DB641](https://forums.digi.com/t/sflash-lib-does-not-support-rcm3305-with-the-at45db641/17119)

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**Author:** [@ceskinner](https://forums.digi.com/u/ceskinner)\
**Replies:** 2\
**Last updated:** [August 2, 2016, 5:33pm UTC](https://forums.digi.com/t/sflash-lib-does-not-support-rcm3305-with-the-at45db641/17119 "2016-08-02T17:33:11Z")

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I received a new revision of the RCM3305 (part number 20-101-1067 E). This module uses the AT45DB641E for the 8MB serial flash in U6. The previous revision used the AT45DB642D in U5. The function sf\_init in the lates…