diff --git a/components/bootloader_support/src/bootloader_random.c b/components/bootloader_support/src/bootloader_random.c
index c8b6c24b1f..b58ebe941d 100644
--- a/components/bootloader_support/src/bootloader_random.c
+++ b/components/bootloader_support/src/bootloader_random.c
@@ -124,10 +124,13 @@ void bootloader_random_disable(void)
     /* Restore SYSCON mode registers */
     CLEAR_PERI_REG_MASK(SENS_SAR_READ_CTRL_REG, SENS_SAR1_DIG_FORCE);
     CLEAR_PERI_REG_MASK(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_DIG_FORCE);
-    CLEAR_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR2_MUX | SYSCON_SARADC_SAR_SEL);
 
     /* Restore SAR ADC mode */
     CLEAR_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_SAR2_EN_TEST);
+    CLEAR_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR2_MUX
+                        | SYSCON_SARADC_SAR_SEL | SYSCON_SARADC_DATA_TO_I2S);
+    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
+    SET_PERI_REG_BITS(SYSCON_SARADC_FSM_REG, SYSCON_SARADC_START_WAIT, 8, SYSCON_SARADC_START_WAIT_S);
 
     /* Reset i2s peripheral */
     SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_I2S0_RST);