diff --git a/ports/cxd56/common-hal/busio/I2C.c b/ports/cxd56/common-hal/busio/I2C.c
index 5579bedeb1..b726552cc0 100644
--- a/ports/cxd56/common-hal/busio/I2C.c
+++ b/ports/cxd56/common-hal/busio/I2C.c
@@ -27,6 +27,7 @@
 #include <arch/chip/pin.h>
 #include <nuttx/i2c/i2c_master.h>
 #include <cxd56_i2c.h>
+#include <cxd56_pinconfig.h>
 
 #include "py/runtime.h"
 
@@ -49,6 +50,7 @@ void common_hal_busio_i2c_construct(busio_i2c_obj_t *self, const mcu_pin_obj_t *
     self->sda_pin = sda;
     self->frequency = frequency;
     self->i2c_dev = cxd56_i2cbus_initialize(0);
+    CXD56_PIN_CONFIGS(PINCONFS_I2C0);
 }
 
 void common_hal_busio_i2c_deinit(busio_i2c_obj_t *self) {
diff --git a/ports/cxd56/common-hal/busio/SPI.c b/ports/cxd56/common-hal/busio/SPI.c
index 56ab0758d4..f9495b7a86 100644
--- a/ports/cxd56/common-hal/busio/SPI.c
+++ b/ports/cxd56/common-hal/busio/SPI.c
@@ -26,6 +26,7 @@
 
 #include <arch/chip/pin.h>
 #include <cxd56_spi.h>
+#include <cxd56_pinconfig.h>
 
 #include "py/runtime.h"
 
@@ -39,10 +40,12 @@ void common_hal_busio_spi_construct(busio_spi_obj_t *self, const mcu_pin_obj_t *
         (mosi == NULL || mosi->number == PIN_SPI4_MOSI) &&
         (miso == NULL || miso->number == PIN_SPI4_MISO)) {
         port = 4;
+        CXD56_PIN_CONFIGS(PINCONFS_SPI4);
     } else if (clock->number == PIN_EMMC_CLK &&
                (mosi == NULL || mosi->number == PIN_EMMC_DATA0) &&
                (miso == NULL || miso->number == PIN_EMMC_DATA1)) {
         port = 5;
+        CXD56_PIN_CONFIGS(PINCONFS_EMMCA_SPI5);
     }
 
     if (port < 0) {