diff --git a/boards/arduino-nano-33-iot/Kconfig b/boards/arduino-nano-33-iot/Kconfig
index a48a492cc991..99ca1a5c3124 100644
--- a/boards/arduino-nano-33-iot/Kconfig
+++ b/boards/arduino-nano-33-iot/Kconfig
@@ -11,7 +11,9 @@ config BOARD_ARDUINO_NANO_33_IOT
     bool
     default y
     select CPU_MODEL_SAMD21G18A
+    select HAS_PERIPH_ADC
     select HAS_PERIPH_I2C
+    select HAS_PERIPH_PWM
     select HAS_PERIPH_RTC
     select HAS_PERIPH_RTT
     select HAS_PERIPH_SPI
diff --git a/boards/arduino-nano-33-iot/Makefile.features b/boards/arduino-nano-33-iot/Makefile.features
index 6aae77d53053..c43f111ff187 100644
--- a/boards/arduino-nano-33-iot/Makefile.features
+++ b/boards/arduino-nano-33-iot/Makefile.features
@@ -2,7 +2,9 @@ CPU = samd21
 CPU_MODEL = samd21g18a
 
 # Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_adc
 FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_pwm
 FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
diff --git a/boards/arduino-nano-33-iot/include/periph_conf.h b/boards/arduino-nano-33-iot/include/periph_conf.h
index e05d2df77a5d..b41bac9f7397 100644
--- a/boards/arduino-nano-33-iot/include/periph_conf.h
+++ b/boards/arduino-nano-33-iot/include/periph_conf.h
@@ -139,6 +139,72 @@ static const uart_conf_t uart_config[] = {
 #define UART_NUMOF          ARRAY_SIZE(uart_config)
 /** @} */
 
+/**
+ * @name PWM configuration
+ * @{
+ */
+#define PWM_0_EN            1
+#define PWM_1_EN            1
+
+#if PWM_0_EN
+/* PWM0 channels */
+static const pwm_conf_chan_t pwm_chan0_config[] = {
+    /* GPIO pin, MUX value, TCC channel */
+    { GPIO_PIN(PA, 4), GPIO_MUX_E, 0},
+    { GPIO_PIN(PA, 5), GPIO_MUX_E, 1},
+};
+#endif
+#if PWM_1_EN
+/* PWM1 channels */
+static const pwm_conf_chan_t pwm_chan1_config[] = {
+    /* GPIO pin, MUX value, TCC channel */
+    { GPIO_PIN(PA, 10), GPIO_MUX_E,  0 },
+    { GPIO_PIN(PA, 11), GPIO_MUX_E,  1 },
+};
+#endif
+
+/* PWM device configuration */
+static const pwm_conf_t pwm_config[] = {
+#if PWM_0_EN
+    {TCC_CONFIG(TCC0), pwm_chan0_config, ARRAY_SIZE(pwm_chan0_config), SAM0_GCLK_MAIN},
+#endif
+
+#if PWM_1_EN
+    {TCC_CONFIG(TCC1), pwm_chan1_config, ARRAY_SIZE(pwm_chan1_config), SAM0_GCLK_MAIN},
+#endif
+};
+
+/* number of devices that are actually defined */
+#define PWM_NUMOF           ARRAY_SIZE(pwm_config)
+/** @} */
+
+/**
+ * @name ADC configuration
+ * @{
+ */
+
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
+
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
+
+static const adc_conf_chan_t adc_channels[] = {
+    /* port, pin, muxpos */
+    {GPIO_PIN(PA, 2), ADC_INPUTCTRL_MUXPOS_PIN0},    /* A0 */
+    {GPIO_PIN(PB, 2), ADC_INPUTCTRL_MUXPOS_PIN10},   /* A1 */
+    {GPIO_PIN(PA, 11), ADC_INPUTCTRL_MUXPOS_PIN19},  /* A2 */
+    {GPIO_PIN(PA, 10), ADC_INPUTCTRL_MUXPOS_PIN18},  /* A3 */
+    {GPIO_PIN(PB, 8), ADC_INPUTCTRL_MUXPOS_PIN2},    /* A4 */
+    {GPIO_PIN(PB, 9), ADC_INPUTCTRL_MUXPOS_PIN3},    /* A5 */
+    {GPIO_PIN(PA, 9), ADC_INPUTCTRL_MUXPOS_PIN17},   /* A6 */
+    {GPIO_PIN(PB, 3), ADC_INPUTCTRL_MUXPOS_PIN11},   /* A7 */
+};
+
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
+/** @} */
+
 /**
  * @name I2C configuration
  * @{
@@ -174,6 +240,18 @@ static const spi_conf_t spi_config[] = {
         .mosi_pad = SPI_PAD_MOSI_0_SCK_3,
         .gclk_src = SAM0_GCLK_MAIN,
     },
+    {
+        .dev = &SERCOM3->SPI,
+        .miso_pin = GPIO_PIN(PA, 19),
+        .mosi_pin = GPIO_PIN(PA, 16),
+        .clk_pin = GPIO_PIN(PA, 17),
+        .miso_mux = GPIO_MUX_D,
+        .mosi_mux = GPIO_MUX_D,
+        .clk_mux = GPIO_MUX_D,
+        .miso_pad = SPI_PAD_MISO_3,
+        .mosi_pad = SPI_PAD_MOSI_0_SCK_1,
+        .gclk_src = SAM0_GCLK_MAIN,
+    },
 };
 
 #define SPI_NUMOF           ARRAY_SIZE(spi_config)