# Mechanism of mangOH Yellow "initial programming"

**URL:** <https://mangoh.discourse.group/t/mechanism-of-mangoh-yellow-initial-programming/9999>\
**Category:** mangOH Yellow\
**Created:** [June 1, 2022, 6:13am UTC](https://mangoh.discourse.group/t/mechanism-of-mangoh-yellow-initial-programming/9999 "2022-06-01T06:13:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![uchida.s](https://avatars.discourse-cdn.com/v4/letter/u/b9bd4f/32.png) [@uchida.s](https://mangoh.discourse.group/u/uchida.s)\
**Post date:** [June 1, 2022, 6:13am UTC](https://mangoh.discourse.group/t/mechanism-of-mangoh-yellow-initial-programming/9999/1 "2022-06-01T06:13:04Z")

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A mangOH Yellow has a mechanism that enables “initial programming”; which the “mangOH Yellow Getting Started Guide” (Document No. 41113347, Rev 4) says.

I have four questions to estimate the possibility of accidentally rewriting the area for the “initial programming”; doing it makes “initial programming” impossible.

1. In the “initial programming”, does the CF3 Module read the default firmware in a specific memory or storage?

2. What memory or storage has the default firmware?

3. Is it possible for a mangOH Yellow user to rewrite the memory or storage which has the default firmware?  
I do not intentionally rewrite the memory or storage, but due to an error in the setting of the write destination path, etc.  
I think if the answer of 2 is a mask ROM, that of 3 is no, but if the answer of 2 is an eMMC, that of 3 could be yes.

4. If the answer of 3 is yes(rewritable), could you tell me how to restore that area?