News Release

BiSS Interface 23.11.2009
BiSS goes Web 2.0
The open source BiSS interface asserted in the bidirectional communication for automation, worldwide and vendor independent. New social media platforms in the web 2.0 demonstrate the ideal platform for intensive communication and networking of BiSS users. Corresponding accounts on Facebook, Twitter and YouTube have been established, RSS feeds are subscribable.
The homepage informs about BiSS products and services and links into the social media in the web 2.0.

At BiSS user´s exhibition booths (SPS/Drives/IPC, HMI, electronica in Germany, China, Japan, USA) visitors can catch up on BiSS as the standard interface in automation and especially on the activities within "interactive web 2.0" and become online a personal fan (Facebook) and follower (Twitter) of BiSS and with this an active part of the global communicative network.

BiSS goes Web 2.0

BiSS: Open Standard Interface for sensor actuator communication
The BiSS interface stands for a bidirectional, serial and safe communication between sensors, actuators and controls. The completely digital communication over the BiSS protocol provides maximum performance at high data rates and safe transmission with sustainable cost advantages.

Highlights of the BiSS interface: - Open source protocol
- Synchronous data acquisition
- Real-time data transfer
- Permanent bidirectional communication
- Point to point and multi slave network
- Automatic line delay compensation
- "Safety" applications supported
- Embedded system use

Potentials for cost reduction: - Compact and cost efficient implementation
- Simple cabling, connectors and line drivers
- Easy to install and maintain
- Free of charge licensing for BiSS device manufacturers
- "Ready-to-use" BiSS IP modules exempt of charges

Silicon for Motion with BiSS-Interface

Point to point connection

The BiSS interface is the ideal interface for sensor and actuator networks, in motion control systems (especially with real-time critical motor feedback) and in machine networking.

Sensor actuator network

You can permanent and bidirectionally access component registers with BiSS, without affecting the main communication. This register communication is useable for parameterisation and verification, additional measures, monitoring and diagnosis; also for electronic identification and OEM data access. The memory mapping for device identification, serial number, EDS and OEM data range (electronic ID plate) is defined.

BiSS slave information structure

All transferred requests and register data as well as each single cycle channel data are CRC secured transmitted and with an individualised start value an identification in safety relevant systems is possible.

CRC secured data transmission

As well as point to point also bus structures are implementable with the BiSS interface. An unlimited count of devices is supported; with a common clock all activities are triggered simultaneously.

Example of an BiSS slave iC-NQC: 13-bit real-time encoder interpolation for uninterrupted measurement

For the first time ever high-resolution sine-to-digital converter iC-NQC provides the microelectronic industry with a BiSS slave in C protocol that enables bidirectional data exchange with the existing device memory at the same time as the cyclic output of measurement data.

BiSS interpolator iC-NQC

In essence, iC-NQC is an interpolation circuit with signal error compensation for sinusoidal sensor signals, such as those generated by optical or magnetic position sensors, for example. Both decimal and binary resolutions of up to 8,192 angle steps per signal period can be set; these can be output as an absolute value via a BiSS Interface at clock rates of up to 10 MHz or incrementally as encoder quadrature signals with A/B and an index Z. A scalable 24-bit period counter also enables signal periods to be tracked.

A signal conditioning unit is integrated to monitor and correct typical sensor errors; this unit intercepts the analog signal path via several D/A converters. iC-NQC can compensate for offset, amplitude and phase errors and indicate broken wires, short circuit, signal override, contamination and aging.

During the output of cyclic data, with clock rates of up to 10 MHz, BiSS C now also simultaneously permits bidirectional communication with the registers. It is no longer necessary to switch modes or use coded PWM data, considerably easing emulation of the protocol by a controller with an SPI interface.

The storage addresses for the device ID, serial number, OEM data and EDS, an optional ID plate, have also been normed.

iC-NQC is assembled in a space-saving 20-pin TSSOP package, taking up just
6.4 x 6.4 mm on the circuit board. It comes with the new NQ6D demo board that can be queued up in a chain, various BiSS PC adapters and a PC user program for evaluation purposes. The programming of resources by the customer can be supported by a device DLL.

Further information is available on

If You have any queries, please contact:
Marko Hepp,
iC-Haus GmbH, Am Kuemmerling 18, D–55294 Bodenheim
Tel: +49 - (0)6135 - 9292-302 Web:
Fax: +49 - (0)6135 - 9292-192 E-Mail:

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