diff --git a/ports/samd/mpconfigport.h b/ports/samd/mpconfigport.h
index c3a0d23700..0e940e1c9a 100644
--- a/ports/samd/mpconfigport.h
+++ b/ports/samd/mpconfigport.h
@@ -93,6 +93,8 @@
 #define MICROPY_PY_MACHINE_SOFTI2C          (1)
 #define MICROPY_PY_MACHINE_SPI              (1)
 #define MICROPY_PY_MACHINE_SOFTSPI          (1)
+#define MICROPY_HW_SOFTSPI_MIN_DELAY        (1)
+#define MICROPY_HW_SOFTSPI_MAX_BAUDRATE     (1000000)
 #define MICROPY_PY_MACHINE_TIMER            (1)
 #define MICROPY_PY_OS_DUPTERM               (3)
 #define MICROPY_PY_MACHINE_BITSTREAM        (1)