-extern __xdata int16_t ao_ground_accel; /* startup acceleration */
-extern __xdata int16_t ao_accel_2g; /* factory accel calibration */
-extern __xdata int32_t ao_accel_scale; /* sensor to m/s² conversion */
+extern __pdata int16_t ao_ground_accel; /* startup acceleration */
+extern __pdata int16_t ao_accel_2g; /* factory accel calibration */
+extern __pdata int32_t ao_accel_scale; /* sensor to m/s² conversion */