# FRAM replacement / Custom board

**URL:** <https://discuss.px4.io/t/fram-replacement-custom-board/5497>\
**Category:** PX4 Autopilot\
**Created:** [January 23, 2018, 12:29am UTC](https://discuss.px4.io/t/fram-replacement-custom-board/5497 "2018-01-23T00:29:58Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jgyoung](https://discuss.px4.io/letter_avatar_proxy/v4/letter/j/58f4c7/32.png) [@jgyoung](https://discuss.px4.io/u/jgyoung)\
**Post date:** [January 23, 2018, 12:29am UTC](https://discuss.px4.io/t/fram-replacement-custom-board/5497/1 "2018-01-23T00:29:58Z")

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If I developed my own board are there any specific configurations which require updating for a different FRAM device? The current FM25V01-G is obsolete. There is a ‘-A’ replacement or I could go with a ‘V02’. The ‘V02’ has 256KB of space opposed to the 128KB of space. Do configurations require updating for that change?

How does the dataman module know when its out of room? A failed write? Or are all of the Max values used to prevent exceeding the space available?

Apologies if all/some of this post belongs in a different area on the forum. I figured this was the best place to start.

Thanks in advance!

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**Author:** ![rokc](https://discuss.px4.io/letter_avatar_proxy/v4/letter/r/dc4da7/32.png) [@rokc](https://discuss.px4.io/u/rokc)\
**Post date:** [February 1, 2019, 11:16am UTC](https://discuss.px4.io/t/fram-replacement-custom-board/5497/2 "2019-02-01T11:16:33Z")

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Hi, I am having the same issue. Did you manage to solve this? Thank you for your help.

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**Author:** ![nrodichenko](https://discuss.px4.io/letter_avatar_proxy/v4/letter/n/96bed5/32.png) [@nrodichenko](https://discuss.px4.io/u/nrodichenko)\
**Post date:** [April 20, 2019, 2:24pm UTC](https://discuss.px4.io/t/fram-replacement-custom-board/5497/3 "2019-04-20T14:24:44Z")

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Hey,

You can safely use ‘-A’ replacement model.