diff --git a/boards/arm/cxd56xx/common/src/cxd56_alt1250.c b/boards/arm/cxd56xx/common/src/cxd56_alt1250.c
index c27792236980f..7daa845684814 100644
--- a/boards/arm/cxd56xx/common/src/cxd56_alt1250.c
+++ b/boards/arm/cxd56xx/common/src/cxd56_alt1250.c
@@ -377,7 +377,8 @@ static void alt1250_reset(void)
 {
   /* Reset Altair modem device */
 
-  board_alt1250_reset();
+  alt1250_poweroff();
+  alt1250_poweron(false);
 }
 
 /****************************************************************************
@@ -501,4 +502,44 @@ int board_alt1250_initialize(const char *devpath)
   return OK;
 }
 
+/****************************************************************************
+ * Name: board_alt1250_reset
+ *
+ * Description:
+ *   Reset the Altair modem device on the board.
+ *
+ ****************************************************************************/
+
+void board_alt1250_reset(void)
+{
+  /* power off Altair modem device */
+
+  board_alt1250_poweroff();
+
+  /* Hi-Z SHUTDOWN and PowerBTN signals before power-on */
+
+  cxd56_gpio_config(ALT1250_SHUTDOWN, false);
+
+  /* power on alt1250 modem device and wait until the power is distributed */
+
+  board_alt1250_poweron();
+  up_mdelay(POWER_ON_WAIT_TIME);
+
+  /* Drive SHUTDOWN signal low */
+
+  cxd56_gpio_write(ALT1250_SHUTDOWN, 0);
+
+  /* Keep the SHUTDOWN signal low for reset period */
+
+  up_mdelay(ACTIVE_SHUTDOWN_TIME);
+
+  /* Undrive SHUTDOWN signal to rise up to high by pull-up */
+
+  cxd56_gpio_write_hiz(ALT1250_SHUTDOWN);
+
+  /* Wait VDDIO on Alt1250 stable */
+
+  up_mdelay(TIME_TO_STABLE_VDDIO);
+}
+
 #endif
diff --git a/boards/arm/cxd56xx/spresense/src/cxd56_alt1250_power.c b/boards/arm/cxd56xx/spresense/src/cxd56_alt1250_power.c
index fc3a612192554..82f48d4859474 100644
--- a/boards/arm/cxd56xx/spresense/src/cxd56_alt1250_power.c
+++ b/boards/arm/cxd56xx/spresense/src/cxd56_alt1250_power.c
@@ -38,19 +38,6 @@
 #include "cxd56_gpio.h"
 #include "cxd56_pinconfig.h"
 
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-#define RESET_INTERVAL_TIMEOUT MSEC2TICK(1)
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-static struct wdog_s g_reset_wd;
-static sem_t g_wd_wait;
-
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -113,52 +100,5 @@ int board_alt1250_powerkeep(bool enable)
       return board_set_reset_gpo(POWER_LTE);
     }
 }
-
-/****************************************************************************
- * Name: board_alt1250_timeout
- *
- * Description:
- *   Watchdog timer for timeout of reset interval.
- *
- ****************************************************************************/
-
-static void board_alt1250_timeout(wdparm_t arg)
-{
-  sem_t *wd_wait = (sem_t *)arg;
-
-  nxsem_post(wd_wait);
-}
-
-/****************************************************************************
- * Name: board_alt1250_reset
- *
- * Description:
- *   Reset the Altair modem device on the board.
- *
- ****************************************************************************/
-
-void board_alt1250_reset(void)
-{
-  memset(&g_reset_wd, 0, sizeof(struct wdog_s));
-  nxsem_init(&g_wd_wait, 0, 0);
-
-  /* Reset Altair modem device */
-
-  board_alt1250_poweroff();
-
-  /* ALT1250_SHUTDOWN should be low in the range 101usec to 100msec */
-
-  wd_start(&g_reset_wd, RESET_INTERVAL_TIMEOUT,
-           board_alt1250_timeout, (wdparm_t)&g_wd_wait);
-
-  /* Wait for the watchdog timer to expire */
-
-  nxsem_wait_uninterruptible(&g_wd_wait);
-
-  board_alt1250_poweron();
-
-  nxsem_destroy(&g_wd_wait);
-}
-
 #endif