Profichip VPC3+C - 1 Introduction

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Introduction 1

1 Introduction

Profichip’s VPC3+C is a communication chip with processor interface for

intelligent PROFIBUS DP-Slave applications. It’s an enhancement of the

VPC3+B in terms of protocol functions and power consumption.

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 slave-to-slave

communication Data eXchange Broadcast (DXB) and the Isochronous Bus

Mode (IsoM), described in DPV2 extension, are also provided.

Automatic recognition and support of data transmissions rates up to 12

Mbit/s, the integration of the complete PROFIBUS DP protocol, 4K Byte

communication RAM and the configurable processor interface are features

to create high-performance PROFIBUS DP-Slave applications. The device

can be operated with either 3.3V or 5V single supply voltage. For 3.3V

operation the inputs are 5V tolerant.

Profichip’s VPC3+ is the predecessor of VPC3+C and VPC3+B. The chip

offers 2 kByte communication RAM and PROFIBUS DP functionality only

and is therefore suited for DP-Slave applications which do not require

DP-V1 or DP-V2 functions. The device can be operated with 5V single

supply only.

VPC3+ and VPC3+C are pin-compatible. Therefore VPC3+ can be

replaced by VPC3+C in existing applications without any restrictions or SW-

modifications. However, downgrading from VPC3+C to VPC3+ is only

possible, if the additional features of VPC3+C (4K Byte RAM, DP-V1- or

DP-V2-functionality, 3.3V supply) are not used.

As there are also simple devices in the automation engineering area, such

as switches or thermoelements, that do not require a microcontroller for

data preprocessing, profichip offers a DP-Slave ASIC with 32 direct

input/output bits. The VPCLS2 handles the entire data traffic independently.

No additional microprocessor or firmware is necessary. The VPCLS2 is

compatible to existing chips.

Further information about our products or current and future projects is

available on our web page:

http://www.profichip.com.

VPC3+C User Manual

Revision 1.03 5