driven by E910.56 Monolithic FlexRay™ Star Coupler Features General Description ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ The star coupler is part of the electrical, physical layer in a FlexRay™ communication network. The E910.56 provides interfaces to connect up to four branches of twisted pair physical bus lines to other bus drivers or star couplers. It also interfaces with a communication controller (CC). Via SPI the bus driver (BD) provides status information concerning failure detection on the bus lines (e.g. short circuit, ground loss) and over temperature condition to a host controller (HOST). An interrupt signal is generated whenever the failure status changes. The device supports normal and standby mode and provides remote wake up capability via bus line. The output (INH) can be used to control an external voltage regulator. Part of the FlexRay™ electrical, physical layer Monolithic FlexRay™ active star connects up to 4 branches (FlexRay™ busses) to nodes or other active stars Additional CC and host interface Supports data rates up to 10MBaud Supports low power mode for ECU Remote and local wake-up Fast forwarding of wake-up frames Enhanced diagnosis capability provided via SPI with interrupt generation Protection against overload damage by current limitation and over temperature detection Bus driver outputs withstand – 27V / + 40V DC Low EME due to balanced differential transmission QFN 9x9 44Ld package Applications ÿ Star coupler and additionally usable as transceiver in FlexRay™ nodes (ECUs) Typical Application ELMOS is a member of the FlexRay consortium Blockdiagram SCSN SCK SDI SDO VBAT Microcontroller (HOST) 4 Bus Failure Detector_1 BP_1 INTN ECU 1 Power Supply RxD TxD TxEN Transmitter_1 Communication Controller Interface SPI INTN LWU TxD BM_1 Receiver_1 Wake up Detector_1 Communication Controller TxEN Local Wakeup Single_Branch_1 Host Interface (SPI + Interrupt) RxD VIO Bus Driver E910.56 VCC INH TRXD1 Central Logic intra star interface TRXD2 VBUF Single_Branch_2 .... BP_2 Single_Branch_3 .... BP_3 Single_Branch_4 .... BP_4 BP_1 BM_1 BP_2 BM_2 BP_3 BM_3 BP_4 BM_4 INH LWU Inhibit & Wake Star Transmitter & Receiver GND VBAT VCC VIO BM_2 BM_3 BM_4 TRXD1 TRXD2 intra star interface Power Undervolt. Supply Monitor POR 5V Overtemp. Regulator Monitor VBUF Vref E910.56 GND ELMOS Semiconductor AG Info Sheet QM-No.: 25IS0005E.00 2009-09-29 ELMOS Semiconductor AG – Headquarters Heinrich-Hertz-Str. 1 | 44227 Dortmund | Germany Phone + 49 (0) 231 - 75 49 - 100 | Fax + 49 (0) 231 - 75 49 - 149 email@example.com | www.elmos.de Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications. Copyright © 2009 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.