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Renesas Electronics Europe - Knowledgebase

What are other information of UB code A?

Latest Updated:06/01/2012


I need more information on UB code A.


UB code A is 32-bit or 2-word data that determines whether to erase or not erase all blocks of the user boot mat, the user mat and the data mat when connected to SCI in boot mode.
In products that have USB boot, the upper value of 55736242h and the lower value of 6F6F74FFh are set to UB code A in advance. When this code is written, the user boot mat is not  erased when connected to SCI in boot mode, but the user mat and data mat are erased. If UB code A is not that specified value, the User Boot Mat, user Mat and Data Mat are erased.
Suitable Products
RX62N, RX621