diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.mk b/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.mk
index 529853b22f5..cc0880ac544 100644
--- a/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.mk
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/mpconfigboard.mk
@@ -7,3 +7,5 @@ CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
 EXTERNAL_FLASH_DEVICES = "GD25Q64C,W25Q64JVxQ"
+
+CIRCUITPY_SDIOIO = 1
diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/pins.c b/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/pins.c
index 78d09407a65..1ab755f0aa1 100644
--- a/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/pins.c
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040_adalogger/pins.c
@@ -4,8 +4,21 @@
 //
 // SPDX-License-Identifier: MIT
 
+#include "py/objtuple.h"
 #include "shared-bindings/board/__init__.h"
 
+// Four consecutive data GPIOs for the 4-bit SDIO interface (sdioio.SDCard).
+static const mp_rom_obj_tuple_t sdio_data_tuple = {
+    {&mp_type_tuple},
+    4,
+    {
+        MP_ROM_PTR(&pin_GPIO20),
+        MP_ROM_PTR(&pin_GPIO21),
+        MP_ROM_PTR(&pin_GPIO22),
+        MP_ROM_PTR(&pin_GPIO23),
+    }
+};
+
 static const mp_rom_map_elem_t board_module_globals_table[] = {
     CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
 
@@ -49,18 +62,26 @@ static const mp_rom_map_elem_t board_module_globals_table[] = {
 
     { MP_ROM_QSTR(MP_QSTR_SD_CARD_DETECT), MP_ROM_PTR(&pin_GPIO16) },
     { MP_ROM_QSTR(MP_QSTR_SD_CLK), MP_ROM_PTR(&pin_GPIO18) },
+    { MP_ROM_QSTR(MP_QSTR_SDIO_CLOCK), MP_ROM_PTR(&pin_GPIO18) },
 
     { MP_ROM_QSTR(MP_QSTR_SD_MOSI), MP_ROM_PTR(&pin_GPIO19) },
     { MP_ROM_QSTR(MP_QSTR_SD_CMD), MP_ROM_PTR(&pin_GPIO19) },
+    { MP_ROM_QSTR(MP_QSTR_SDIO_COMMAND), MP_ROM_PTR(&pin_GPIO19) },
 
     { MP_ROM_QSTR(MP_QSTR_SD_MISO), MP_ROM_PTR(&pin_GPIO20) },
     { MP_ROM_QSTR(MP_QSTR_SD_DAT0), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_SDIO_DATA0), MP_ROM_PTR(&pin_GPIO20) },
 
     { MP_ROM_QSTR(MP_QSTR_SD_DAT1), MP_ROM_PTR(&pin_GPIO21) },
+    { MP_ROM_QSTR(MP_QSTR_SDIO_DATA1), MP_ROM_PTR(&pin_GPIO21) },
     { MP_ROM_QSTR(MP_QSTR_SD_DAT2), MP_ROM_PTR(&pin_GPIO22) },
+    { MP_ROM_QSTR(MP_QSTR_SDIO_DATA2), MP_ROM_PTR(&pin_GPIO22) },
 
     { MP_ROM_QSTR(MP_QSTR_SD_CS), MP_ROM_PTR(&pin_GPIO23) },
     { MP_ROM_QSTR(MP_QSTR_SD_DAT3), MP_ROM_PTR(&pin_GPIO23) },
+    { MP_ROM_QSTR(MP_QSTR_SDIO_DATA3), MP_ROM_PTR(&pin_GPIO23) },
+
+    { MP_ROM_QSTR(MP_QSTR_SDIO_DATA), MP_ROM_PTR(&sdio_data_tuple) },
 
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
     { MP_ROM_QSTR(MP_QSTR_STEMMA_I2C), MP_ROM_PTR(&board_i2c_obj) },