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Is it necessary to set efuse_prog_supply_gate in order to blow OTP?

Question asked by George Fukutomi on Aug 19, 2015
Latest reply on Sep 15, 2015 by George Fukutomi

Dear All,

 

We set CCM_CGPR [ efuse_prog_supply_gate ] bit, in order to blow OTP.

However, It seems that even unset can blow OTP.

 

We can see it set in SDK for i.MX6.

But, we cannot find that it is set in u-boot and linux-kernel source code.

 

Possibly, is this bit unnecessary in order to blow efuse on i.MX6?

Please let me know the detailed function for this bit in i.MX6.

 

Best Regards,

George

 

P.S. If the eFUSE values are reload to shadow registers, with this bit set, we will get an incorrect value in some areas.

Original Attachment has been moved to: incorrect_shadow_register.txt.zip

Original Attachment has been moved to: can_blow_also_with_unset_supply_gate.txt.zip

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