MUE_OTP_PWR_DN
val = mue_csr_read(un, MUE_OTP_PWR_DN);
mue_csr_write(un, MUE_OTP_PWR_DN, 0);
err = MUE_WAIT_CLR(un, MUE_OTP_PWR_DN, MUE_OTP_PWR_DN_PWRDN_N,