diff --git a/demos/STM32/RT-STM32H743I-NUCLEO144/mcuconf.h b/demos/STM32/RT-STM32H743I-NUCLEO144/mcuconf.h
index d317d47f6..b347e8c83 100644
--- a/demos/STM32/RT-STM32H743I-NUCLEO144/mcuconf.h
+++ b/demos/STM32/RT-STM32H743I-NUCLEO144/mcuconf.h
@@ -64,7 +64,6 @@
 #define STM32_HSE_ENABLED                   TRUE
 #define STM32_LSE_ENABLED                   TRUE
 #define STM32_HSIDIV                        STM32_HSIDIV_DIV1
-#define STM32_RTCPRE_VALUE                  8
 
 /*
  * PLLs static settings.
@@ -124,6 +123,11 @@
 #define STM32_MCO1PRE_VALUE                 4
 #define STM32_MCO2SEL                       STM32_MCO2SEL_SYS_CK
 #define STM32_MCO2PRE_VALUE                 4
+#define STM32_TIMPRE_ENABLE                 TRUE
+#define STM32_HRTIMSEL                      0
+#define STM32_STOPKERWUCK                   0
+#define STM32_STOPWUCK                      0
+#define STM32_RTCPRE_VALUE                  8
 #define STM32_CKPERSEL                      STM32_CKPERSEL_HSE_CK
 #define STM32_SDMMCSEL                      STM32_SDMMCSEL_PLL1_Q_CK
 #define STM32_QSPISEL                       STM32_QSPISEL_HCLK
diff --git a/os/hal/ports/STM32/STM32H7xx/hal_lld.c b/os/hal/ports/STM32/STM32H7xx/hal_lld.c
index e1f93a6ff..acf8047fb 100644
--- a/os/hal/ports/STM32/STM32H7xx/hal_lld.c
+++ b/os/hal/ports/STM32/STM32H7xx/hal_lld.c
@@ -157,6 +157,8 @@ void hal_lld_init(void) {
  * @special
  */
 void stm32_clock_init(void) {
+  uint32_t cfgr;
+
 #if 0
   RCC_TypeDef *rcc = RCC; /* For inspection.*/
   (void)rcc;
@@ -197,9 +199,14 @@ void stm32_clock_init(void) {
 
   /* Other clock-related settings, done before other things because
      recommended in the RM.*/
-  RCC->CFGR = STM32_MCO2SEL | RCC_CFGR_MCO2PRE_VALUE(STM32_MCO2PRE_VALUE) |
-              STM32_MCO1SEL | RCC_CFGR_MCO1PRE_VALUE(STM32_MCO1PRE_VALUE) |
-              RCC_CFGR_RTCPRE_VALUE(STM32_RTCPRE_VALUE);
+  cfgr = STM32_MCO2SEL | RCC_CFGR_MCO2PRE_VALUE(STM32_MCO2PRE_VALUE) |
+         STM32_MCO1SEL | RCC_CFGR_MCO1PRE_VALUE(STM32_MCO1PRE_VALUE) |
+         RCC_CFGR_RTCPRE_VALUE(STM32_RTCPRE_VALUE) |
+         STM32_HRTIMSEL | STM32_STOPKERWUCK | STM32_STOPWUCK;
+#if STM32_TIMPRE_ENABLE == TRUE
+  cfgr |= RCC_CFGR_TIMPRE;
+#endif
+  RCC->CFGR = cfgr;
 
   /* HSE activation with optional bypass.*/
 #if STM32_HSE_ENABLED == TRUE
diff --git a/os/hal/ports/STM32/STM32H7xx/hal_lld.h b/os/hal/ports/STM32/STM32H7xx/hal_lld.h
index 642bee1d3..489030d3e 100644
--- a/os/hal/ports/STM32/STM32H7xx/hal_lld.h
+++ b/os/hal/ports/STM32/STM32H7xx/hal_lld.h
@@ -360,6 +360,12 @@
 #define STM32_RTCSEL_LSI_CK             RCC_BDCR_RTCSEL_VALUE(2U)
 #define STM32_RTCSEL_HSE_1M_CK          RCC_BDCR_RTCSEL_VALUE(3U)
 
+#define STM32_HRTIMSEL_C_CLK            RCC_CFGR_HRTIMSEL
+
+#define STM32_STOPKERWUCK_ENABLED       RCC_CFGR_STOPKERWUCK
+
+#define STM32_STOPWUCK_ENABLED          RCC_CFGR_STOPKERWUCK
+
 #define STM32_PLLSRC_HSI_CK             RCC_PLLCKSELR_PLLSRC_VALUE(0U)
 #define STM32_PLLSRC_CSI_CK             RCC_PLLCKSELR_PLLSRC_VALUE(1U)
 #define STM32_PLLSRC_HSE_CK             RCC_PLLCKSELR_PLLSRC_VALUE(2U)
@@ -622,14 +628,6 @@
 #define STM32_HSIDIV                        STM32_HSIDIV_DIV1
 #endif
 
-/**
- * @brief   RTC HSE prescaler value.
- * @note    The allowed values are 2..63.
- */
-#if !defined(STM32_RTCPRE_VALUE) || defined(__DOXYGEN__)
-#define STM32_RTCPRE_VALUE                  8
-#endif
-
 /**
  * @brief   Clock source for all PLLs.
  */
@@ -910,6 +908,42 @@
 #define STM32_MCO2PRE_VALUE                 4
 #endif
 
+/**
+ * @brief   TIM clock prescaler selection.
+ */
+#if !defined(STM32_TIMPRE_ENABLE) || defined(__DOXYGEN__)
+#define STM32_TIMPRE_ENABLE                 FALSE
+#endif
+
+/**
+ * @brief   HRTIM clock prescaler selection.
+ */
+#if !defined(STM32_HRTIMSEL) || defined(__DOXYGEN__)
+#define STM32_HRTIMSEL                      0
+#endif
+
+/**
+ * @brief   Kernel clock selection after a wake up from system Stop.
+ */
+#if !defined(STM32_STOPKERWUCK) || defined(__DOXYGEN__)
+#define STM32_STOPKERWUCK                   0
+#endif
+
+/**
+ * @brief   System clock selection after a wake up from system Stop.
+ */
+#if !defined(STM32_STOPWUCK) || defined(__DOXYGEN__)
+#define STM32_STOPWUCK                      0
+#endif
+
+/**
+ * @brief   RTC HSE prescaler value.
+ * @note    The allowed values are 2..63.
+ */
+#if !defined(STM32_RTCPRE_VALUE) || defined(__DOXYGEN__)
+#define STM32_RTCPRE_VALUE                  8
+#endif
+
 /**
  * @brief   Main clock source selection.
  * @note    This setting can be modified at runtime.
@@ -2220,6 +2254,31 @@
 #define STM32_FLASHBITS             0x00000007
 #endif
 
+/**
+ * @brief   Clock of timers connected to APB1
+ */
+#if (STM32_D2PPRE1 == STM32_D2PPRE1_DIV1) || defined(__DOXYGEN__)
+#define STM32_TIMCLK1               (STM32_PCLK1 * 1)
+#else
+#if (STM32_TIMPRE_ENABLE == FALSE) || (STM32_D2PPRE1 == STM32_D2PPRE1_DIV2)
+#define STM32_TIMCLK1               (STM32_PCLK1 * 2)
+#else
+#define STM32_TIMCLK1               (STM32_PCLK1 * 4)
+#endif
+#endif
+
+/**
+ * @brief   Clock of timers connected to APB2.
+ */
+#if (STM32_D2PPRE2 == STM32_D2PPRE2_DIV1) || defined(__DOXYGEN__)
+#define STM32_TIMCLK2               (STM32_PCLK2 * 1)
+#else
+#if (STM32_TIMPRE_ENABLE == FALSE) || (STM32_D2PPRE2 == STM32_D2PPRE2_DIV2)
+#define STM32_TIMCLK2               (STM32_PCLK2 * 2)
+#else
+#define STM32_TIMCLK2               (STM32_PCLK2 * 4)
+#endif
+#endif
 
 
 
@@ -2499,24 +2558,6 @@
 #else
 #error "invalid source selected for SDMMC clock"
 #endif
-
-/**
- * @brief   Clock of timers connected to APB1
- */
-#if (STM32_PPRE1 == STM32_PPRE1_DIV1) || defined(__DOXYGEN__)
-#define STM32_TIMCLK1               (STM32_PCLK1 * 1)
-#else
-#define STM32_TIMCLK1               (STM32_PCLK1 * 2)
-#endif
-
-/**
- * @brief   Clock of timers connected to APB2.
- */
-#if (STM32_PPRE2 == STM32_PPRE2_DIV1) || defined(__DOXYGEN__)
-#define STM32_TIMCLK2               (STM32_PCLK2 * 1)
-#else
-#define STM32_TIMCLK2               (STM32_PCLK2 * 2)
-#endif
 #endif
 
 /*===========================================================================*/