diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.h b/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.h
index 343601694230c..4c500366dfca9 100644
--- a/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.h
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.h
@@ -23,3 +23,11 @@
 
 // #define CIRCUITPY_CONSOLE_UART_RX DEFAULT_UART_BUS_RX
 // #define CIRCUITPY_CONSOLE_UART_TX DEFAULT_UART_BUS_TX
+
+// Onboard microSD slot on SPI1.
+#define DEFAULT_SD_SCK (&pin_GPIO18)
+#define DEFAULT_SD_MOSI (&pin_GPIO19)
+#define DEFAULT_SD_MISO (&pin_GPIO20)
+#define DEFAULT_SD_CS (&pin_GPIO23)
+#define DEFAULT_SD_CARD_DETECT (&pin_GPIO16)
+#define DEFAULT_SD_CARD_INSERTED true
diff --git a/ports/raspberrypi/boards/adafruit_metro_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/adafruit_metro_rp2040/mpconfigboard.h
index 4242599354c38..fdbd18c0e66cd 100644
--- a/ports/raspberrypi/boards/adafruit_metro_rp2040/mpconfigboard.h
+++ b/ports/raspberrypi/boards/adafruit_metro_rp2040/mpconfigboard.h
@@ -20,3 +20,11 @@
 
 #define DEFAULT_UART_BUS_RX (&pin_GPIO1)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO0)
+
+// Onboard microSD slot.
+#define DEFAULT_SD_SCK (&pin_GPIO18)
+#define DEFAULT_SD_MOSI (&pin_GPIO19)
+#define DEFAULT_SD_MISO (&pin_GPIO20)
+#define DEFAULT_SD_CS (&pin_GPIO23)
+#define DEFAULT_SD_CARD_DETECT (&pin_GPIO15)
+#define DEFAULT_SD_CARD_INSERTED true