LIN controller targets ambient lighting applications

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By eeNews Europe

The device integrates a 16-bit microcontroller with 32 kByte NVM, 128Byte EEPROM and a LIN transceiver, which meets the requirements up to LIN 2.2. The microcontroller can be programmed with IAR’s widely used software development environment. Addressing in the network is performed with integrated BSM auto addressing.

Furthermore, the device has three current sources with up to 40mA each and three 16 bit PWM generators. The 48MHz PWM clock ensures that the full 16-bit color resolution with a refresh rate of 732Hz is possible, which enables flicker-free applications and meets all known OEM requirements.

Also integrated is a temperature sensor for energy management and temperature compensation. Furthermore, a differential measurement of the LED voltage can be carried out with the ADC and thus an effective temperature compensation can be achieved.

BSM auto-addressing is a robust and proven method for addressing subscribers in a LIN bus system. All development and diagnostic tools required for this procedure are already in use in the field. The method used is based on passive components in the LIN line and offers very good fault tolerance, e.g. with “Loss of Ground”, as well as the possibility of “mixed” installation with standard LIN bus devices. This means that bus devices that do not know the BSM process can also be integrated into a system. Each bus participant can also be reached during the addressing of the participants. Broadcasts can be sent to all participants at any time. By a simple software implementation in the slave, the master can plausibility check the address assignment. This unique function even makes address assignment subject to diagnosis.

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