NCV7381 FlexRay® Bus Driver Evaluation Board User`s Manual
Contents
1. qaem mE UCCSU EXT 170 71 6 0 ROSE js o 5 iE CB os im a R113 IRA TP 1 607381 _ _02 12 SH11 IRO ab d gt mr m 0 mil 220 Figure 11 NCV7381 EVB PCB Top Assembly Drawing TP_INHI_B 5 3 70 mil LI ri p M4 ci 021 030 020 1 4 unn mno 5 IH 555 0 CYT OSS Figure 12 NCV7381 EVB PCB Bottom Assembly Drawing http onsemi com 15 NCV73812037EVB Composite Drawings N wf amp CA GE t e v TA ELA 1111 jeg Ia rJ 03 gg Figure 14 NCV7381 EVB PCB Bottom Composite Drawing Mirrored http onsemi com 16 NCV73812037EVB PCB General Parameters Material Cu Plating Thickness e Surface Treatment Solder Resist Dimensions Length Width Thickness Minimum Clearance 4 18 Green Both Sides 0 5 oz 107 2 mm 4220 mil 70 4 m 2770 mil 1 5 mm 0 25 mm 9 842 mil http onsemi com 17 NCV73812037EVB REFERENCES 1 On Semiconductor NCV7381 FlexRay Transceiver Rev 0 May 2012 2 FlexRay Consortium FlexRay Communications System Ele2. 220 mild Legend 1 Power Supply Input Connector 9 FlexRay BD Signals Test Points Channel A 2 Aux Digital Connector 10 FlexRay BD Signals Test Points Channel 3 CAN Backbone Connector 1 11 MCU Reset Switch 4 CAN Backbone Connector 2 12 MCU External Interrupt Switch 5 USB Interface 13 BD Local Wakeup Switch Channel A 6 Address Switch 14 BD Local Wakeup Switch Channel B 7 FlexRay CC Strobe Output Signals 15 FlexRay Bus Connector Channel 8 BDM Connector MCU Debugging Interface 16 FlexRay Bus Connector Channel Power Supply Input Connector Ji Power supply input socket Plug diameter 2 1 mm length 14 mm Maximum input voltage 42 V Limited by onboard voltage regulators Aux Digital I O Connector These pin header contains 6 auxiliary MCU signals one complete SPI interface 4 pins and one UART interface 2 pins These signals can be also used as general Input Output signals for debugging or other purposes CAN Backbone Connectors CAN backbone network is created as parallel connection of several boards Each board contains two equivalent connectors in parallel so whole network can be prepared using only simple point to point twisted pair http onsemi com 4 NCV73812037EVB USB Interface Standard B type USB socket is used for connection to PC USB interface is bus powered and electrically isolated from the rest of the board so it is not possible to supply this board via USB Fl
3. Ch A Open Closed BD VBUF Connected to BD VCC Open BD VBAT Disconnected J80 Bus Driver VBAT Supply Ch B Closed Closed BD VBAT Connected Open BD VBUF Disconnected J81 Bus Driver VBUF Supply Ch B Open Closed BD VBUF Connected to BD VCC Jumper J70 Bus Driver VBAT Supply Ch A Switches and Pushbuttons y 5070 HAKEA 5 SHIO RESET d EE FR 1O mu Em Figure 2 Switches Description SW10 MCU Reset button SW11 MCU External interrupt button SWI12 8 way DIP switch The function depends MCU program As default ti it used for setting a node address SW70 FlexRay Transceiver Local Wakeup button Channel e SWS0 FlexRay Transceiver Local Wakeup button Channel http onsemi com 7 NCV73812037EVB Address Switch This switch is used for setting a node number Each board is programmed with the same firmware so every node in the network must be configured with different unique number Be careful LSB is situated on the left 01234567 ON means the particular switch is closed and output is OF Logical 0 OFF means particular switch is open and output is Logical 1 _ on MCU Reset Button This switch is used for generating low level at the MCU Reset pin If MCU detects low level at the RESET pin external reset is perf
4. others SCILLC products are not designed intended or authorized for use as components in systems intended for surgical implant into the body or other applications intended to support or sustain life or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application Buyer shall indemnify and hold SCILLC and its officers employees subsidiaries affiliates and distributors harmless against all claims costs damages and expenses and reasonable attorney fees arising out of directly or indirectly any claim of personal injury or death associated with such unintended or unauthorized use even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part SCILLC is an Equal Opportunity Affirmative Action Employer This literature is subject to all applicable copyright laws and is not for resale in any manner PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT American Technical Support 800 282 9855 Toll Free Semiconductor Website www onsemi com Literature Distribution Center for ON Semiconductor USA Canada P O Box 5163 Denver Colorado 80217 USA Europe Middle East and Africa Technical Support Order Literature http www onsemi com orderlit Phone 303 675 2175 or 800 344 3860 Toll Free USA Canada Phone 421 33 790 2910 Fax 30
5. 09 0 20 0 003 0 008 DETAIL E Ji 0 09 0 16 0 003 0 006 K 025 038 0 010 0 015 025 033 0 010 0 013 mj o 8 8 SEATING PLANE Lacu C D snm FlexRay is a registered trademark of FlexRay Consortium Freescale is a trademark of Freescale Semiconductor Inc ON Semiconductor and 0 are registered trademarks of Semiconductor Components Industries LLC SCILLC SCILLC owns the rights to a number of patents trademarks copyrights trade secrets and other intellectual property A listing of product patent coverage may be accessed at www onsemi com site pdf Patent Marking pdf SCILLC reserves the right to make changes without further notice to any products herein SCILLC makes no warranty representation or guarantee regarding the suitability of its products for any particular purpose nor does SCILLC assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation special consequential or incidental damages Typical parameters which may be provided in SCILLC data sheets and or specifications can and do vary in different applications and actual performance may vary over time All operating parameters including Typicals must be validated for each customer application by customer s technical experts SCILLC does not convey any license under its patent rights nor the rights of
6. 3 675 2176 or 800 344 3867 Toll Free USA Canada Japan Customer Focus Center For additional information please contact your local Email orderlit onsemi com Phone 81 3 5817 1050 Sales Representative EVBUM2037 D
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8. EVBUM2037 D NCV73812037EVB GENERAL FEATURES FlexRay Transceiver Two Separate FlexRay Channels with NCV7381 Bus Driver Compliant with the FlexRay Electrical Physical Layer Specification Rev 3 0 1 Reconfigurable Bus Termination End Node Middle Node Common Mode Choke and Additional ESD Protection Footprint e SUBD 9 Connectors FlexRay bus Local Wakeup Switch MCU Freescale 16 bit MC9S12XF Family MCU ntegrated FlexRay Communication Controller Protocol Specification Rev 2 1 ntegrated CAN 2 0 A B Controller Background Debug Modul Single wire Communication with Host Development System e 512 kB Flash 32 kB RAM e 50 MHz Maximum CPU Bus Frequency Relatively Small 112 pin LOFP Package Peripherals Optical Isolated USB Interface USB to UART Converter Additional CAN Interface All NCV7381 Digital I O Pins Connected to Test Points Easy Connection to Logic Analyzer 8 General Purpose LEDs Address Switch Other Two Automotive Voltage Regulators with Inhibit Function Input Battery Voltage Up to 42 V Power Supplies Voltage Monitoring nstant 2 nodes FlexRay Network with Running Communication by Connecting Two NCV7381 EVBs PC Configuration Software under Development Available upon Request PCB Layout The FlexRay Transceiver the ESD Protection and the Common Mode Choke are Placed near to the FlexRay the ECU Connector The FlexRay Signal Lines BP BM are Decoup
9. NCV73812037EVB NCV7381 FlexRay Bus Driver Evaluation Board User s Manual Introduction This document describes the NCV7381 APP V2 Evaluation board for the ON Semiconductor NCV7381 FlexRay Bus Driver The functionality and major parameters can be evaluated with the NCV7381 APP v2 board The NCV7381 is a single channel FlexRay bus driver compliant with the FlexRay Electrical Physical Layer Specification Rev 3 0 1 capable of communicating at speeds of up to 10 Mb s It provides differential transmit and receive capability between wired FlexRay communication medium on one side and a protocol controller and a host on the other side NCV7381 mode control functionality is optimized for nodes permanently connected to car battery Additional details can be found in the NCV7381 datasheet 4m 11 Am Ot 92 04 ot gt v O OIIO O 1 a 112 2732 5 2 E ua ee i e m 2 6 2 The NCV7381 APP V2 Evaluation board is a reference design for stand alone 2 channel FlexRay node The board is intended to give designers easy quick and convenient means for evaluation of NCV7381 FlexRay bus drivers The design incorporates complete node solution with possibility of modifications and small board size A set of two boards Sem
10. ck Diagram NCV7381 Typical Application Diagram Cygari CvBAT2 l cr BP BM MCU e gt FlexRay Bus Guardian WAKE O GND Figure 5 NCV7381 FlexRay Bus Driver Typical Application Diagram http onsemi com 9 NCV73812037EVB Component Decoupling Capacitor on Battery Line Electrolytic Decoupling Capacitor on Battery Line Ceramic XR7 Decoupling Capacitor on Vcc Supply Line Ceramic XR7 Note 1 Decoupling Capacitor on Vio Supply Line Ceramic XR7 Note 1 To improve EMC performance 2 2 uF ceramic decoupling capacitor is recommended Type 1206 1 Type 0805 1 Recommended common mode chokes EPCOS 82789 0104 00 EPCOS B82799C0104N001 ACT45R 101 2P TLxxx TDK ACT45B 101 2P TLxxx x don t care noir SPECIFICATIONS Power Supply The Evaluation board can be power either via DC power supply input socket with plug diameter 2 1 mm and length 14 mm or by one of the FlexRay bus connectors See the connector description section Maximum input voltage 42 V is limited by on board voltage regulators input voltage range Split Termination In order to achieve a better EMC performance it is recommended to make use of a so called split termination in all ECUS where the Termination resistance is split into two equal parts and 2 Figure 6 ECU with Split Termination 2 The serial RC combination at the cen
11. ctrical Physical Layer Specification V3 0 1 October 2010 3 FlexRay Consortium FlexRay Communications System Physical Layer EMC Measurement Specification V3 0 1 October 2010 http onsemi com 18 NCV73812037EVB PACKAGE DRAWING AND DIMENSIONS 16 LEAD SSOP CASE 940B 03 ISSUE D N SCALE 2 1 Y14 5M 1982 2 CONTROLLING DIMENSION MILLIMETER 3 DIMENSION A DOES NOT INCLUDE MOLD FLASH PROTRUSIONS OR GATE BURRS MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0 15 0 006 PER SIDE 4 DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0 15 0 006 PER SIDE 5 DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION INTRUSION ALLOWABLE DAMBAR PROTRUSION SHALL BE 0 13 0 005 TOTAL IN EXCESS OF K DIMENSION AT MAXIMUM MATERIAL CONDITION DAMBAR INTRUSION SHALL NOT REDUCE DIMENSION K BY MORE THAN 0 07 0 002 AT LEAST MATERIAL CONDITION 6 TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY 7 DIMENSION A AND ARE BE DETERMINED 0 K1 AT DATUM PLANE W mE MN wax iN 607 6 0298 026 8 520 538 0205 0212 c 173 te 0078 7 A 3 3 D oo 021 0002 0008 063 oss 0024 0097 _ zi fL e 06850 0006850 K 16 PL REF NOTES 0 12 0 005 W 0 25 0 010 1 DIMENSIONING AND TOLERANCING PER ANSI 073 0 90 0 028 0 035 e 4 0
12. exRay CC Strobe Output Signals O STBN3 The MCU FlexRay block provides a number of strobe signals for observing internal protocol timing related signals STBNO O STBN2 in the protocol engine These signals are connected to STBN pin header BDM Connector MCU Debugging Interface J10 The BDM module provides a single wire communication BKGD O O GND with host development system Programming and O RESET debugging interface IO Olvec FlexRay BD Digital Signals Test Points Headers J83 These headers are intended to be used as a test points for GND O 6 GND digital probes Headers contain all FlexRay BD digital input O output signals TXEN O Test points for both FlexRay channel and channel B are BGE O O sTEN placed on separated headers 773 channel J83 channel B ERRN FlexRay BD Analog Signals Test Points Each FlexRay channel contains 4 analog test points NHI Bus Driver Inhibit 1 output NH2 Bus Driver Inhibit 2 output BP FlexRay Bus Plus terminal BM FlexRay Bus Minus terminal FlexRay Bus Connectors FlexRay EPL Specification 1 does not prescribe certain connectors for FlexRay systems Common used 9 pin D Sub connectors were chosen as a suitable connector whose electrical characteristics satisfy the specification Table 1 FLEXRAY CONNECTOR Ping Description Connection ESD P
13. iconductor Components Industries LLC 2012 July 2012 Rev 2 ON Semiconductor http onsemi com EVAL BOARD USER S MANUAL allows users immediately start with the NCV7381 FlexRay Bus Driver The MCU is preprogrammed with a firmware which provides simple mode control and FlexRay communication With use of Freescale BDM programmer and a suitable development environment the MCU firmware can be freely modified and reprogrammed NCV7381 Pin Connections INH Vcc EN BP Vio _ BM TxD e GND TxEN WAKE RxD VBAT BGE ERRN STBN RxEN FB20100921 4 Board Hardware The board consists of MCU with integrated 2 channel FlexRay communication controller interconnected with two separate FlexRay bus drivers NCV7381 two switchable voltage regulators and peripherals The board is prepared for various modifications in power supply concept and FlexRay bus termination and allows simple extension of the system by unused MCU pins USB interface provides compatibility with standard PC The address of each board can be easily modified by address switch what allows creating complex FlexRay network without need of reprogramming the MCU Implemented High Speed CAN interface can be used as a diagnostic interface in a network built from several nodes For evaluation purposes NCV7381 is populated with several LED diodes and most of the bus driver signals are comfortable accessible to oscilloscope probes Publication Order Number
14. led from Disturbances on the ECU Board The Routing of the FlexRay Lines BP BM TX and TXEN is Symmetric The Distance between the Lines BP and BM resp TX and TXEN is Minimized http onsemi com 2 NCV73812037EVB GETTING STARTED The NCV7381EVB board is fully assembled pre programmed and can be immediately used for evaluation Only a few steps need be proceeded to get fully working simple FlexRay network Connect the evaluation boards as follows 1 Set the boards to default configuration according to Jumpers and Default Configuration section 2 Set a different board address on each board One of the boards must be set with address 1 and is considered as Master Board Node address is configurable by address switch SW12 see Address Switch section for details 3 Connect the boards according to figure below 4 Optionally connect an oscilloscope to any test point as needed 5 After the power supply is applied FlexRay communication is automatically initialized Node 1 2 gt PIS N EEE With properly running setup button SW11 IRQ has following functions Press the button shortly to read out Bus Driver status register Only in Bus Driver status indication mode Press and hold the button for approximately 2 seconds to change LED bar indication mode Three modes are available FlexRay communication indication each LED is assigned t
15. mi com 11 NCV73812037EVB Common Mode Choke A common mode choke is used to improve the emission and immunity performance The function of the common mode choke is to force the current in both signal wires to be of the same strength but opposite direction Therefore the choke represents high impedance for common mode signals The parasitic stray inductance should be as low as possible in order to keep oscillations on the bus low The common mode choke is placed between transceiver and split termination 2 Figure 10 ECU with Split Termination and Common Mode Choke 2 Table 8 COMMON MODE CHOKE REQUIREMENTS 2 ___ Description Unt __ Resistance per Line http onsemi com 12 NCV73812037EVB MCU PROGRAMMING INTERFACE The NCV7381 EVB firmware can be freely reprogrammed using MCU programming and debugging interface J10 The used Freescale MC9S12XF Family MCU can be programmed with P amp E USB Multilink BDM module P amp E USB Multilink BDM Module Distributors 346 657 Software Development Tool Suitable development tool allowing programming and debugging Freescale microcontrollers is CodeWarrior Development Studio www freescale com The P amp E USB Multilink BDM module is directly supported 23 Freescale CodeWarrior File Edit wiew Search Project Processor Expert Window Help Bee 2 5 8 ERE zd xi NGCV7381 EVB V1 mcp UNIFIED driver impleme
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17. ntation P amp E Multilink CuclonePro include Fr UNIFIED h Link Order Targets FlexkEay bus driver modes Type definition typedef enum readme txt FR BD NORMAL 0 Hormal mode tips tt FR BD RECEIVE ONLY Receive only mode OE Sources FR BD STANDBY Standby mode e FE BD GOTOSLEEP Go to sleep mode FE BD SLEEP Sleep mode B datapage c Bi Vectors c Fr BD mode type 77381 Status Register Flags definitions pragma OPTION ADD V3 0toV3lCompatible BfaGapLlimitBitz4 typedef union word Word struct 4 word LocalWakeUp word RemoteWakeUp word 2 word PowerOn word BusError 60 files word ThermalShutdown word ThermalWarning The NCV7381 EVB firmware can be downloaded from ON Semiconductor web site www onsemi com http onsemi com 13 NCV73812037EVB SCHEMATIC 0 5 2 ubreg NO IIN3S NO ZA ddV L8 Z2AON ioo 961 MEO S080 BEE 5 090 3NO0L 8 OWS WINYL 8902 T 67 900790217 HOL 67 900 9001 HOL xp 851 22A WOLSNS Odd ASN IDA oor b 1612 9WSH QNS 1 1 1 MIX 090 3 001 090 3400 1619 9 SH T T 2922 99 292 QWS 8 diaMs pu is JNOSd33 91 4 1 ZIMS as
18. o one slot according to LED number The LED is blinking if the respective slot in FlexRay communication is active Bus Driver status indication Channel A Bus Driver status indication Channel B LED Local Wake Up status LED2 Remote Wake Up status LED3 TxEN BGE Timeout status LED4 Bus Error status LEDS Vio Undervoltage status LED6 Vcc Undervoltage status LED7 Vbat Undervoltage status LEDS Power On status Press and hold the button for more than 5 seconds Both nodes are switched to SLEEP mode and can be woken up by one of the Local Wake up switches Only Node 1 is allowed to send the rest of network to SLEEP mode In SLEEP mode NCV7381 is supplied only from VBAT supply VCC and VIO power supplies are switched off by NCV7381 INH output MCU is not running and the board can be woken up only with one of the Local Wakeup buttons SW70 SW80 NCV7381 Local Wakeup function Wake up one of the nodes by any Local Wakeup button NCV7381 Remote Wakeup function Second node is woken up by Remote Wakeup pattern sent over the FlexRay bus by first node during initialization phase after Local Wakeup http onsemi com 3 NCV73812037EVB BOARD OVERVIEW Basic Interface 0000 al OOOO 8b 86 BEBE OO 05 E B SHi1 IRG n s oo a E inis TP_INHI_B TP_INH2 8 SLT 2770 mi ld
19. ormed MCU External Interrupt Button The MCU interrupt module support one maskable interrupt input This input is connected to SW11 BD Local Wakeup Buttons The FlexRay Bus drivers support Local Wakeup event detection If a falling edge is recognized on WAKE pin a local wakeup is detected These switches each for one FlexRay channel are used for simulation of Local wakeup event normally generated by e g mechanical switch LEDs Three power LEDs indicate proper function of voltage regulators In case the MCU and the NCV7381 bus drivers IO cells use the same power supply as by default MCU VCC LED and BD VIO LED signalling is also the same The board contains a bank of eight general purpose LEDs Green Their function depends on the MCU program There is also USB indication LED which is used to signal ongoing USB data transmission MCU VCC BD VIO BD VCC NN p 32 ERE GP LEDs USB LED Figure 3 LEDs Description http onsemi com 8 NCV73812037EVB BLOCK DIAGRAM PROGRAMMING USB CAN DEBUG INTERFACE INTERFACE BACKBONE MCU MC9S12XF512MLM FlexRay CC A FlexRay CC B LED s AUX PINS FlexRay CC AUX OUTPUTS CLOCK EXTERNAL RESET POWER SUPPLIES MCU 8 FR BD IO VIO 5V FR BD VCC INH NCV7381 NCV7381 FlexRay BD A FlexRay BD B PASSIVE NETWORK PASSIVE NETWORK FlexRay CONNECTOR FlexRay CONNECTOR Figure 4 NCV7381 Evaluation Board Blo
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21. rotection __ Reserved Netometd Yes Optional GND be o o Reserved NeComeded _ oa Z Connector type 9 pin D Sub DIN 41652 or corresponding international standard plug male post __ NetComeded http onsemi com 5 NCV73812037EVB Jumpers and Default Configuration o UCCSUYEXT J70 1 1 132 3 500 o oJ 752 pos M Jeo 41 Figure 1 Jumpers and Soldering Straps Table 2 2 PIN JUMPER Table 3 3 PIN JUMPER Table 4 NCV7381 EVB JUMPERS CONFIGURATION Open Controlled by bd INH1 x J20 MCU VCOC 5 V State Open Closed Always On Open BD VIO Disconnected Closed 1 2 J23 BC VIO Power Supply Selection Closed 1 2 BD VIO Connected to MCU VCC Closed 2 3 BD VIO External VIO Power Supply Open Controlled by MCU J30 BD VCC State Closed Closed Controlled by bd INHx x Open bd INH2 A J32 BD VCC Inhibit Source Ch A Closed Closed bd INH1 A Open bd INH2 B J33 BD VCC Inhibit Source Ch B Closed Closed bd INH1 B Open Without Termination J40 CAN Bus Termination Closed Closed With 120 Termination Open LEDs Disabled J52 General Purpose LED Closed Closed LEDs Enabled http onsemi com 6 NCV73812037EVB Table 4 NCV7381 EVB JUMPERS CONFIGURATION Open BD VBAT Disconnected Closed Closed BD VBAT Connected Open BD VBUF Disconnected J71 Bus Driver VBUF Supply
22. tre tap of the split termination provides a termination to GND for common mode signals R4 is preferably omitted Typical values are given in the following table Table 5 TERMINATION PARAMETERS For and the use of 1 tolerated resistors leads to a matching of 2 The better the matching of the split termination resistors Rya and the lower the electromagnetic emission http onsemi com 10 NCV73812037EVB Standard Termination Recommended bus split termination is shown in the Figure 7 Considering passive network without active stars proper termination should be applied at the two nodes that have the maximum electrical distance on the bus The sum of termination resistors values should match the nominal cable impedance At other nodes a high ohmic split termination should be applied FlexRay Bus Driver 2 Figure 7 Basic Split Termination Table 6 BASIC SPLIT TERMINATION PARAMETERS Description End Node Middle Node Custom Termination In some cases a specific termination topology is required for middle modes Such a termination connection and typical values are shown in Figure 9 and Table 7 FlexRay Bus Driver FlexRay Bus Driver RTA RTB Y C1 1 C1 Figure 8 End Node Split Termination Figure 9 Middle Node Split Termination Table 7 CUSTOM SPLIT TERMINATION PARAMETERS o ___ Termination Resistors o m _ Termination Capacitors http onse
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