The VPC3+C handles the message and address identification, the data security sequences and the protocol processing for PROFIBUS-DP. In addition the acyclic communication and alarm messages, described in DPV1 extension, are supported. Furthermore the

详细讲解了ATMEGA128单片机如何访问外部扩展存储器0x0000---0x10FF之间空间的方法，最后用实例予以验证。(The method of how ATMEGA128 MCU access the space between external extended memory 0x0000---0x10FF is explained in detail. Finally, an example is used to verify it.)