diff --git a/project/example/ble/ble_peripheral/app/src/fmc_spi.c b/project/example/ble/ble_peripheral/app/src/fmc_spi.c
index 96289dc..1fa64e4 100644
--- a/project/example/ble/ble_peripheral/app/src/fmc_spi.c
+++ b/project/example/ble/ble_peripheral/app/src/fmc_spi.c
@@ -79,7 +79,7 @@ unsigned char get_checksum(unsigned char *ptrdata, unsigned char length)
 #define FLASH_POWER_CYCLE_INDEX        29U
 #define FLASH_POWER_MODE_MARK          0xA7U
 #define POWER_POLICY_SAVE_DELAY_MS     100U
-#define POWER_CYCLE_SAVE_DELAY_MS      100U
+#define USER_DATA_FLASH_ADDR           0x1E000UL
 
 uint8_t power_restore_policy = POWER_RESTORE_CYCLE_STATIC;
 static uint8_t power_cycle_next_mode;
@@ -288,6 +288,15 @@ void power_restore_apply_on_boot(void)
 
 	power_cycle_next_mode = (uint8_t)((mode_index + 1U) % 3U);
 
-	/* Save the next startup mode while power is stable. */
-	set_TaskComps_timer(2U, POWER_CYCLE_SAVE_DELAY_MS);
+	/*
+	 * Save the next startup mode before timers, BLE and the H-bridge start.
+	 * A deferred flash erase/write masks interrupts long enough to stretch
+	 * one Timer3-controlled dual-color pulse and causes a visible flash.
+	 */
+	wright_user_data();
+	GLOBAL_INT_DISABLE();
+	xc_fmc_spi_flash_erase_page(USER_DATA_FLASH_ADDR);
+	xc_fmc_spi_flash_write_page(USER_DATA_FLASH_ADDR,
+	                            app_data, FLASH_PAGE_SIZE);
+	GLOBAL_INT_RESTORE();
 }
diff --git a/project/example/ble/ble_peripheral/app/src/ota_flash_interface.c b/project/example/ble/ble_peripheral/app/src/ota_flash_interface.c
index d309ed3..84eeeff 100644
--- a/project/example/ble/ble_peripheral/app/src/ota_flash_interface.c
+++ b/project/example/ble/ble_peripheral/app/src/ota_flash_interface.c
@@ -92,7 +92,7 @@ void ble_flash_handle(void)
     }
 }
 
-uint8_t app_data[128] = {0};
+uint8_t app_data[FLASH_PAGE_SIZE] = {0};
 
 //uint16_t app_op_flash_start = 10000;
 void app_op_flash(void)