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TMS570LC4357: Need clarification on MSTGCR register, MSTGENA bits in TMS570LC43x Technical reference manual

Part Number: TMS570LC4357


MSTGCR register, MSTGENA says Memory self-test controller is enabled when Ah is written. Same register Note says " It is recommended that a value of Ah be used to disable the memory self-test
controller. This value will give maximum protection from a bit flip inducing event that would inadvertently enable the controller" 

Could you please confirm which one is correct note or MSTGENA (0-3) value. I believe 0xA only correct to enable as PBIST section mention to use 0xAh to enable.