07/22/2013 Test Procedure for the NCV7383GEVK Required Equipment Dual channel Oscilloscope Bench Power Supply Voltmeter Two NCV7383 Evaluation Boards Two 12V power supply adapters Two FlexRay bus cable assemblies Test procedure Step 1: Figure 1. Input current and voltage regulators output voltage test 1. 2. 3. 4. 5. Set the boards to default configuration according to Error! Reference source not found. section. Select one of the bus termination concepts ( Bus Termination Configuration section) and adapt the respective parts. End node bus termination is recommended for 2-nodes network. Connect the setup as shown above. Apply an input voltage, VBAT = 12 V Check IIN, VCC and VIO Table 1. Desired Results IIN = 65 mA to 75 mA VCC = 4.9 V to 5.1 V VIO = 3.2 V to 3.4 V Test procedure Step 2: Figure 2. Simple FlexRay network configuration 1. 2. 3. 4. 5. 6. Connect two boards according to figure above. 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). Connect an oscilloscope to BP and BM test-points (Channel A or B). After the power supply is applied, FlexRay communication should be automatically initialized, what should be signaled by one of the LEDs (LED4-LED8) on both nodes. Communication on FlexRay bus should be visible on oscilloscope (BP and BM test-points). Press and hold SW11 (#IRQ) on Node 1 for more than 3 seconds. Both nodes should be switched to STANDBY mode. FlexRay communication is stopped and the current consumption should be reduced. Press the #IRQ button on any node. Both nodes should be woken up and the FlexRay communication should be restarted. Results: The following waveforms should be visible in Normal mode (Figure 3) and in Standby mode (Figure 4). Figure 3. Normal mode Battery current consumption is typ. 70 mA per node in Normal mode. Figure 4. Standby mode Battery current consumption is typ. 10 mA per node in Standby mode. Most of the current is consumed by the power supplies LED indicators. Jumpers and Default Configuration Figure 5. Jumpers and Soldering Straps Table 3. 2-pin Jumper Open Table 2. 3-pin Jumper 1 2 3 Open Closed Closed position 1-2 Closed position 2-3 Table 4. NCV7383 EVB Jumpers Configuration Jumper Function Configuration Open J3 Bus Driver VIO supply Closed Open J4 Bus Driver VCC supply J40 CAN bus termination J52 General purpose LED J53 UART power supply J54 MCU output mcu_PP0 function Closed Open Closed Open Closed Channel B SCK pin connection UART Enabled Open Closed Closed 1-2 Closed 1-2 Closed 2-3 J75 Bus Driver Dig. Pull-ups (Ch A) J85 Bus Driver Dig. Pull-ups (Ch B) Bus Driver VCC unsupplied Bus Driver VCC connected to voltage regulator output CAN bus without termination CAN bus with 120Ω termination LEDs Disabled LEDs Enabled Closed Open Channel B SDO pin connection Bus Driver VIO connected to voltage regulator output UART Disabled Closed 2-3 J89 Bus Driver VIO unsupplied Open Open J87 Description Open Closed Open Closed Closed LED D101 disabled, PWM0 enabled LED D101 enabled, PWM0 not recommended SCK_B disconnected SCK_B connected to common hardware SPI interface SCK_B connected to separated software SPI interface SDO_B disconnected SDO_B connected to common hardware SPI interface SDO_B connected to separated software SPI interface TxEN, SCN and SCK pull-ups disconnected from VIO TxEN, SCN and SCK pull-ups connected to VIO TxEN, SCN and SCK pull-ups disconnected from VIO TxEN, SCN and SCK pull-ups connected to VIO TxEN, SCN and SCK pull-ups connected to VIO Default Closed 3V3 – 3V3_BD Closed 5V – 5V_BD Closed Closed Open Closed Closed 1-2 Closed 1-2 Closed Closed Bus Termination Configuration BP FlexRay Bus Driver BUS BM C 75 C 85 C 76 C 86 R 70 R 80 R71 R81 R 72 R 82 C 77 C 87 Figure 6. FlexRay bus termination connection (Channel A: R7x, C7x; Channel B: R8x, C8x) Table 5. FlexRay Bus Termination configuration Component Ch. A: C75, C76 Ch. B: C85, C86 Ch. A: R70, R71 Ch. B: R80, R81 Ch. A: R72 Ch. B: R82 Ch. A: C77 Ch. B: C87 End node (Low-Ohmic termination) Middle node – Variant 1 (High-Ohmic termination) Middle node – Variant 2 (Custom termination) Short Short 100 pF 47 Ω 1300 Ω 24 Ω Not Assembled Not Assembled 47 Ω 4.7 nF 4.7 nF 4.7 pF