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profichip´s VPC3+S is a communication chip with 8 Bit parallel, SPI or I2C Microprocessor interface for intelligent PROFIBUS slave applications. The VPC3+S 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 DP-V1 extension, are supported. Furthermore the slave-to-slave communication Data eXchange Broadcast (DXB) and the Isochronous Mode (IsoM), described in DP-V2 extension, are also provided.