diff --git a/Adafruit_SPIDevice.h b/Adafruit_SPIDevice.h
index 3d0c32d..55a2d70 100644
--- a/Adafruit_SPIDevice.h
+++ b/Adafruit_SPIDevice.h
@@ -17,7 +17,7 @@ typedef enum _BitOrder {
   SPI_BITORDER_LSBFIRST = LSBFIRST,
 } BitOrder;
 
-#elif defined(ESP32)
+#elif defined(ESP32) || defined(__ASR6501__)
 
 // some modern SPI definitions don't have BitOrder enum and have different SPI
 // mode defines
@@ -47,7 +47,9 @@ typedef uint32_t BusIO_PortMask;
     !defined(ARDUINO_ARCH_MBED)
 typedef volatile uint32_t BusIO_PortReg;
 typedef uint32_t BusIO_PortMask;
+#if not defined(__ASR6501__)
 #define BUSIO_USE_FAST_PINIO
+#endif
 
 #else
 #undef BUSIO_USE_FAST_PINIO