diff --git a/cpu/fe310/include/periph_cpu.h b/cpu/fe310/include/periph_cpu.h
index d2593b1af0..6ce2c99660 100644
--- a/cpu/fe310/include/periph_cpu.h
+++ b/cpu/fe310/include/periph_cpu.h
@@ -167,12 +167,8 @@ typedef struct {
 #define RTT_MIN_FREQUENCY   (1U)                    /* in Hz */
 
 #ifndef RTT_FREQUENCY
-#ifdef MODULE_PERIPH_RTC
-#define RTT_FREQUENCY       (RTT_MIN_FREQUENCY)     /* in Hz */
-#else
 #define RTT_FREQUENCY       (RTT_MAX_FREQUENCY)     /* in Hz */
 #endif
-#endif
 
 /**
  * @brief   Initialization of the clock
diff --git a/drivers/sx127x/Kconfig b/drivers/sx127x/Kconfig
index 1e20fc4eb9..cf51ea364b 100644
--- a/drivers/sx127x/Kconfig
+++ b/drivers/sx127x/Kconfig
@@ -40,10 +40,6 @@ config MODULE_SX127X
     select MODULE_PERIPH_SPI_GPIO_MODE if HAS_PERIPH_SPI_GPIO_MODE
     select MODULE_PERIPH_SPI
     select MODULE_ZTIMER
-    select MODULE_ZTIMER_PERIPH_TIMER
-    select MODULE_ZTIMER_USEC
     select MODULE_ZTIMER_MSEC
 
-    imply MODULE_ZTIMER_PERIPH_RTT
-
 endif # TEST_KCONFIG
diff --git a/drivers/sx127x/Makefile.dep b/drivers/sx127x/Makefile.dep
index 3b0cd904ad..0dbc8ab7a5 100644
--- a/drivers/sx127x/Makefile.dep
+++ b/drivers/sx127x/Makefile.dep
@@ -3,7 +3,6 @@ FEATURES_REQUIRED += periph_gpio_irq
 FEATURES_REQUIRED += periph_spi
 FEATURES_OPTIONAL += periph_spi_gpio_mode
 USEMODULE += iolist
-USEMODULE += ztimer_usec
 USEMODULE += ztimer_msec
 
 USEMODULE += lora
diff --git a/drivers/sx127x/sx127x.c b/drivers/sx127x/sx127x.c
index 15f047a9cd..c341e5e046 100644
--- a/drivers/sx127x/sx127x.c
+++ b/drivers/sx127x/sx127x.c
@@ -45,20 +45,20 @@
 #include "debug.h"
 
 /* The reset signal must be applied for at least 100 µs to trigger the manual
-   reset of the device. To ensure this value is big enough even with an
-   inaccurate clock source, an additional 10 % error margin is added. */
-#define SX127X_MANUAL_RESET_SIGNAL_LEN_US       (110U)
+   reset of the device. In order to avoid a dependency to the high frequency
+   timers, we round it to 1 ms */
+#define SX127X_MANUAL_RESET_SIGNAL_LEN_MS       (1U)
 
 /* After triggering a manual reset the device needs at least 5 ms to become
-   ready before interacting with it. To ensure this value is big enough even
-   with an inaccurate clock source, an additional 10 % error margin is added. */
-#define SX127X_MANUAL_RESET_WAIT_FOR_READY_US   (5500U)
+   ready before interacting with it. We round up to 6 ms in case the clock
+   source is not accurate enough */
+#define SX127X_MANUAL_RESET_WAIT_FOR_READY_MS   (6U)
 
 /* When the device is started by enabling its power supply for the first time
    i.e. on Power-on-Reset (POR), it needs at least 10 ms after the POR cycle is
    done to become ready. To ensure this value is big enough even with an
    inaccurate clock source, an additional 10 % error margin is added. */
-#define SX127X_POR_WAIT_FOR_READY_US            (11U * US_PER_MS)
+#define SX127X_POR_WAIT_FOR_READY_MS            (11U)
 
 /* Internal functions */
 static int _init_spi(sx127x_t *dev);
@@ -116,12 +116,12 @@ int sx127x_reset(const sx127x_t *dev)
         /* set reset pin to the state that triggers manual reset */
         gpio_write(dev->params.reset_pin, SX127X_POR_ACTIVE_LOGIC_LEVEL);
 
-        ztimer_sleep(ZTIMER_USEC, SX127X_MANUAL_RESET_SIGNAL_LEN_US);
+        ztimer_sleep(ZTIMER_MSEC, SX127X_MANUAL_RESET_SIGNAL_LEN_MS);
 
         /* Put reset pin in High-Z */
         gpio_init(dev->params.reset_pin, GPIO_IN);
 
-        ztimer_sleep(ZTIMER_USEC, SX127X_MANUAL_RESET_WAIT_FOR_READY_US);
+        ztimer_sleep(ZTIMER_MSEC, SX127X_MANUAL_RESET_WAIT_FOR_READY_MS);
     }
 
     return 0;
@@ -153,7 +153,7 @@ int sx127x_init(sx127x_t *dev)
     }
 
     /* wait for the device to become ready */
-    ztimer_sleep(ZTIMER_USEC, SX127X_POR_WAIT_FOR_READY_US);
+    ztimer_sleep(ZTIMER_MSEC, SX127X_POR_WAIT_FOR_READY_MS);
 
     sx127x_reset(dev);
 
diff --git a/makefiles/features_modules.inc.mk b/makefiles/features_modules.inc.mk
index 79610756ba..de95d7c4d8 100644
--- a/makefiles/features_modules.inc.mk
+++ b/makefiles/features_modules.inc.mk
@@ -11,7 +11,12 @@ USEMODULE += $(PERIPH_FEATURES)
 
 # Add all USED periph_% init modules unless they are blacklisted
 ifneq (,$(filter periph_init, $(USEMODULE)))
-  PERIPH_MODULES := $(filter-out periph_init% periph_common,\
+  PERIPH_IGNORE_MODULES := \
+    periph_init% \
+    periph_common \
+    periph_rtc_rtt \
+    #
+  PERIPH_MODULES := $(filter-out $(PERIPH_IGNORE_MODULES),\
                                  $(filter periph_%,$(USEMODULE)))
   # Use simple expansion to avoid USEMODULE referencing itself
   PERIPH_INIT_MODULES := $(subst periph_,periph_init_,$(PERIPH_MODULES))
diff --git a/sys/ztimer/Makefile.include b/sys/ztimer/Makefile.include
index 679b774e3a..dc4f5f3b85 100644
--- a/sys/ztimer/Makefile.include
+++ b/sys/ztimer/Makefile.include
@@ -8,7 +8,7 @@ endif
 # might not be the most optimized for conversion guarantees that ztimer_periph_rtt
 # will have a capable backend.
 ifneq (,$(filter ztimer_periph_rtt,$(USEMODULE)))
-  ifneq (,$(filter stm32 nrf5% sam% kinetis efm32,$(CPU)))
+  ifneq (,$(filter stm32 nrf5% sam% kinetis efm32 fe310,$(CPU)))
     RTT_FREQUENCY ?= RTT_MAX_FREQUENCY
     CFLAGS += -DRTT_FREQUENCY=$(RTT_FREQUENCY)
   endif