diff --git a/drivers/rtt64/rtt64_rtc.c b/drivers/rtt64/rtt64_rtc.c
new file mode 100644
index 0000000000000..410cb935eb704
--- /dev/null
+++ b/drivers/rtt64/rtt64_rtc.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2022 ML!PA Consulting GmbH
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License v2.1. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup     drivers_rtt64
+ * @{
+ *
+ * @file
+ * @brief       Basic RTC implementation based on RTT64
+ *
+ * @note        Unlike a real RTC, this emulated version is not guaranteed to keep
+ *              time across reboots or deep sleep.
+ *              If your hardware provides the means to implement a real RTC, always
+ *              prefer that over this emulated version!
+ *
+ * @author      Benjamin Valentin <benjamin.valentin@ml-pa.com>
+ *
+ * @}
+ */
+
+#include <time.h>
+
+#include "irq.h"
+#include "periph/rtc.h"
+#include "rtt64.h"
+#include "time_units.h"
+
+#define ENABLE_DEBUG    0
+#include "debug.h"
+
+void rtc_init(void)
+{
+    rtt64_init();
+}
+
+int rtc_set_time(struct tm *time)
+{
+    rtt64_set_time(mktime(time), 0);
+    return 0;
+}
+
+int rtc_get_time_ms(struct tm *time, uint16_t *ms)
+{
+    uint64_t secs;
+    uint32_t us;
+
+    rtt64_get_time(&secs, &us);
+
+    if (ms) {
+        *ms = us / US_PER_MS;
+    }
+    localtime_r((time_t *)&secs, time);
+
+    return 0;
+}
+
+int rtc_get_time(struct tm *time)
+{
+    return rtc_get_time_ms(time, NULL);
+}
+
+int rtc_get_alarm(struct tm *time)
+{
+    uint64_t secs;
+    uint32_t us;
+
+    rtt64_get_alarm_time(&secs, &us);
+    localtime_r((time_t *)&secs, time);
+
+    return 0;
+}
+
+int rtc_set_alarm(struct tm *time, rtc_alarm_cb_t cb, void *arg)
+{
+    rtt64_set_alarm_time(mktime(time), 0, cb, arg);
+
+    return 0;
+}
+
+void rtc_clear_alarm(void)
+{
+    rtt64_clear_alarm();
+}
+
+void rtc_poweron(void)
+{
+    rtt_poweron();
+}
+
+void rtc_poweroff(void)
+{
+    rtt_poweroff();
+}
diff --git a/pkg/fatfs/Makefile.dep b/pkg/fatfs/Makefile.dep
index c1443f3ac3df2..ec686af20915d 100644
--- a/pkg/fatfs/Makefile.dep
+++ b/pkg/fatfs/Makefile.dep
@@ -6,6 +6,6 @@ ifneq (,$(filter vfs_auto_format,$(USEMODULE)))
 endif
 
 # Use RTC for timestamps if available
-ifeq (,$(filter rtt_rtc,$(USEMODULE)))
+ifeq (,$(filter rtt_rtc rtt64,$(USEMODULE)))
   FEATURES_OPTIONAL += periph_rtc
 endif
diff --git a/pkg/fatfs/Makefile.include b/pkg/fatfs/Makefile.include
index 43d2785d5163b..f40e4642f0d24 100644
--- a/pkg/fatfs/Makefile.include
+++ b/pkg/fatfs/Makefile.include
@@ -6,12 +6,12 @@ NATIVEINCLUDES += -I$(RIOTPKG)/fatfs/vendor/include
 
 DIRS += $(RIOTBASE)/pkg/fatfs/fatfs_diskio/mtd
 
-ifneq (,$(filter fatfs_vfs,$(USEMODULE)))
+ifneq (,$(filter fatfs_vfs rtt64,$(USEMODULE)))
   DIRS += $(RIOTBASE)/pkg/fatfs/fatfs_vfs
 endif
 
 #if periph_rtc is available use it. Otherwise use static timestamps
-ifeq (,$(filter rtt_rtc periph_rtc,$(USEMODULE)))
+ifeq (,$(filter rtt_rtc periph_rtc rtt64,$(USEMODULE)))
   CFLAGS += -DFATFS_FFCONF_OPT_FS_NORTC=1
 else
   CFLAGS += -DFATFS_FFCONF_OPT_FS_NORTC=0
diff --git a/sys/shell/commands/Makefile b/sys/shell/commands/Makefile
index 12300217ce332..17529deaefc57 100644
--- a/sys/shell/commands/Makefile
+++ b/sys/shell/commands/Makefile
@@ -106,7 +106,7 @@ ifneq (,$(filter lwip_netif,$(USEMODULE)))
   SRC += sc_lwip_netif.c
 endif
 
-ifneq (,$(filter rtt_rtc periph_rtc,$(USEMODULE)))
+ifneq (,$(filter rtt_rtc periph_rtc rtt64,$(USEMODULE)))
   SRC += sc_rtc.c
 endif
 
diff --git a/sys/shell/commands/shell_commands.c b/sys/shell/commands/shell_commands.c
index 7598355e93d9e..9dbb0e52d78cf 100644
--- a/sys/shell/commands/shell_commands.c
+++ b/sys/shell/commands/shell_commands.c
@@ -64,7 +64,7 @@ extern int _at30tse75x_handler(int argc, char **argv);
 extern int _saul(int argc, char **argv);
 #endif
 
-#if defined(MODULE_PERIPH_RTC) || defined(MODULE_RTT_RTC)
+#if defined(MODULE_PERIPH_RTC) || defined(MODULE_RTT_RTC) || defined(MODULE_RTT64)
 extern int _rtc_handler(int argc, char **argv);
 #endif
 
@@ -278,7 +278,7 @@ const shell_command_t _shell_command_list[] = {
     { "random_init", "initializes the PRNG", _random_init },
     { "random_get", "returns 32 bit of pseudo randomness", _random_get },
 #endif
-#if defined(MODULE_PERIPH_RTC) || defined(MODULE_RTT_RTC)
+#if defined(MODULE_PERIPH_RTC) || defined(MODULE_RTT_RTC) || defined(MODULE_RTT64)
     {"rtc", "control RTC peripheral interface",  _rtc_handler},
 #endif
 #ifdef MODULE_RTT_CMD