Question on the subject of iMX535 fuses:
Would the following fuse settings result in any issues / problems / risks?
If boot MMU/Cache is enabled (BT_MMU_ENABLE=1) but security config is left open (SEC_CONFIG=01)
Additional info:
Setting up to boot via eMMC
BT_MMU_ENABLE IIM address:080C[0]
SEC_CONFIG IIM address:0810[1:0]
Thanks
SZ
已解决! 转到解答。
Hi sherry
there is no special technical reason for the above recommendation,
it just points that with SEC_CONFIG=Open this setting is useless,
as will not improve boot performance.
Best regards
igor
Hi sherry
no, it will not cause any problems or issues
Best regards
igor
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Hi Igor,
Thanks for the quick response. The reason I asked was because the reference manual recommends that boot MMU/cache should be disabled if security config is left open:-
From IMX53RM Rev2.1 (Section 7.4.4)
"Enabling the MMU when booting non-securely by setting, SEC_CONFIG=Open and
setting the CSF pointer in the Image Vector Table set to NULL, has no impact on the
boot performance. With this configuration it is recommended not to blow the MMU_EN
fuse."
Would there be any technical reason for the above recommendation?
Thanks,
SZ
Hi sherry
there is no special technical reason for the above recommendation,
it just points that with SEC_CONFIG=Open this setting is useless,
as will not improve boot performance.
Best regards
igor