-#define AO_EE_BLOCK_SIZE ((uint16_t) (256))
-#define AO_EE_DEVICE_SIZE ((uint32_t) 128 * (uint32_t) 1024)
-#define AO_EE_DATA_SIZE (AO_EE_DEVICE_SIZE - (uint32_t) AO_EE_BLOCK_SIZE)
-#define AO_EE_CONFIG_BLOCK ((uint16_t) (AO_EE_DATA_SIZE / AO_EE_BLOCK_SIZE))
+/* Block size - device is erased in these units. At least 256 bytes */
+extern __xdata uint32_t ao_storage_block;