diff --git a/board/nm/nmhw21/board.c b/board/nm/nmhw21/board.c
index efbd29c03b..615144c9d7 100644
--- a/board/nm/nmhw21/board.c
+++ b/board/nm/nmhw21/board.c
@@ -64,7 +64,7 @@ DECLARE_GLOBAL_DATA_PTR;
 * (V17) GPIO1_27: WLAN_IRQ
 * (U18) GPIO1_28: LED0.GN
 *
-* (U3) GPIO2_16: SIM_PRES~ (V2.0)
+* (U3) GPIO2_16: TIMEPULSE~ (HW26)
 * (R6) GPIO2_25: RST_ETH~
 *
 * (J17) GPIO3_4: GNSS_EXTINT
@@ -102,7 +102,7 @@ DECLARE_GLOBAL_DATA_PTR;
 #define CAN1_TERM_N		GPIO_TO_PIN(0, 23)
 
 #define GPIO_SIM_SEL		GPIO_TO_PIN(1, 12)
-#define GPIO_SIM_PRES_N		GPIO_TO_PIN(2, 16)
+#define GPIO_TIMEPULSE		GPIO_TO_PIN(2, 16)
 
 #define GPIO_UART2_RX 		GPIO_TO_PIN(0, 2)	/* UART Rx Pin as GPIO */
 
@@ -819,14 +819,6 @@ static void init_sim_mux(void)
 	 * Switch pluggable micro SIM to onboard modem (mux = 1)
 	 */
 	REQUEST_AND_SET_GPIO(GPIO_SIM_SEL);
-
-	/*
-	 * Inform modem that SIM is installed
-	 *  - uBlox TOBY-L2 Datasheet UBX-13004573 - R24
-	 *  - uBlox TOBY-L2-MPCI-L2_SysIntegrManual_(UBX-13004618) - R26
-	 *    1.8.2 SIM detection interface
-	 */
-	REQUEST_AND_CLEAR_GPIO(GPIO_SIM_PRES_N);
 }
 
 static void init_gsm(void)
@@ -909,6 +901,21 @@ static void init_gnss(void)
 	REQUEST_AND_SET_GPIO(GPIO_RST_GNSS);
 }
 
+static void init_timepulse(void)
+{
+	/*
+	 * Configure timepulse as input.
+	 * 
+	 * Note:
+	 * Was output on HW21, function SIM_PRES_N, never worked.
+	 * Therefore reused as timepulse input on hw26.
+	 */
+
+	/*
+	 * Action: None, just leave pin at reset default = input 
+	 */
+}
+
 #endif /* !defined(CONFIG_SPL_BUILD) */
 
 
@@ -1659,6 +1666,7 @@ int board_late_init(void)
 	init_sim_mux();
 	init_gsm();
 	init_gnss();
+	init_timepulse();
 
 	/*
 	 * Check if a user action is requested
diff --git a/board/nm/nmhw21/mux.c b/board/nm/nmhw21/mux.c
index 1621c14b26..cbd9b5e7fd 100644
--- a/board/nm/nmhw21/mux.c
+++ b/board/nm/nmhw21/mux.c
@@ -40,7 +40,7 @@ static struct module_pin_mux gpio_pin_mux[] = {
 	* (V17) GPIO1_27: WLAN_IRQ
 	* (U18) GPIO1_28: LED0.RD
 	*
-	* (U3) GPIO2_16: SIM_PRES~ (V2.0)
+	* (U3) GPIO2_16: TIMEPULSE (HW26)
 	* (R6) GPIO2_25: RST_ETH~
 	*
 	* (J17) GPIO3_4: GNSS_EXTINT
@@ -73,7 +73,7 @@ static struct module_pin_mux gpio_pin_mux[] = {
 	/* TODO: What about all the unused GPMC pins ? */
 
 	/* Bank 2 */
-	{OFFSET(lcd_data10), (MODE(7) | PULLUDDIS)},				/* (U3) GPIO2_16: SIM_PRES~ */
+	{OFFSET(lcd_data10), (MODE(7) | PULLUDEN | PULLDOWN_EN | RXACTIVE)},	/* (U3) GPIO2_16: TIMEPULSE input */
 	{OFFSET(lcd_ac_bias_en), (MODE(7) | PULLUDDIS)},			/* (R6) GPIO2_25: RST_ETH~ */
 
 #if 0