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NXP Semiconductors UJA1169A Скачать руководство пользователя страница 12

NXP Semiconductors

UM11758

UJA1169A evaluation boards

2.5 LIMP output

The LIMP pin can be accessed on top-side connector J3. It is targeted at applications

that need a ‘limp home’ feature in the event of serious ECU failure. LIMP is an open-drain

low-side output. It can be biased to an application-specific voltage level, such as via a

pull-up resistor to BAT in the evaluation setup.
Red LED D4, connected in series with resistor R5, turns on when LIMP is triggered.

UJA1169A

UJA1169Ax-EVB

LIMP (pin 11)

J3-14: connect to limp home signal

Table 8. VEXT connection

aaa-045552

UJA1169A

J3

LIMP(p11)

LIMP

R5

1 kΩ

D4

LED

BAT

Figure 12. LIMP circuitry

UM11758

All information provided in this document is subject to legal disclaimers.

© NXP B.V. 2022. All rights reserved.

User manual

Rev. 1 — 19 April 2022

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Содержание UJA1169A

Страница 1: ...intended to represent a final design recommendation for any particular application Final device in an application heavily depends on proper printed circuit board layout and heat sinking design as wel...

Страница 2: ...JA1169A evaluation board family consists of three variant boards as detailed in Table 1 The entire UJA1169A product family can be evaluated using these three boards and not just the onboard devices Fo...

Страница 3: ...ed battery supply status LEDs for BAT V1 V2 VEXT and LIMP signals external PNP transistor for thermal management local wake up and CAN bus termination The boards also provide several header rows 2 54...

Страница 4: ...jumper J8 to disconnect VIN on J5 from the battery supply Table 3 BAT VIN connections Both supply circuits are routed via polarity protection Schottky diode D1 in order to block reverse currents Deco...

Страница 5: ...header J5 via jumper J7 e g for the MCU IO supply VEXCTRL pin 15 TP4 VEXCC pin 6 J9 01 connected to the collector of the onboard PNP transistor PNP UJA1169Ax EVB B pin 4 J9 03 connected to the base of...

Страница 6: ...ND Pull up resistor R15 is used to pull up the PNP base voltage to prevent it floating e g if R10 has been removed and therefore ensure that the PNP is turned OFF Filter capacitor C9 is needed to prot...

Страница 7: ...Ax EVB PCB configured to operate without a PNP Figure 6 UJA1169Ax EVB PCB configured to operate without a PNP 2 2 2 3 UJA1169Ax EVB with multiple external PNPs If thermal dissipation is so high that i...

Страница 8: ...3 1 6 J7 R15 100 k R10 0 PNP C8 6 8 F C9 10 nF R15 100 k PNP R4 10 R4 10 C9 10 nF R15 100 k PNP R4 10 C9 10 nF Figure 7 Simplified schematic of UJA1169Ax EVB with multiple PNPs Figure 8 UJA1169Ax EVB...

Страница 9: ...ver up to 100 mA A decoupling capacitor C10 is connected between the pin and ground on the board LED D6 lights up when the V2 VEXT output is active The V2 UJA1169AF EVB and UJA1169AF3 EVB or VEXT UJA1...

Страница 10: ...onfigured to be used as termination nodes in a CAN network If the CAN network is already terminated at both ends it is recommended to remove R2 and R3 or replace them with higher value resistors to en...

Страница 11: ...aluation boards feature local wake up test circuitry The WAKE pin is pulled HIGH by default via 10 k resistors R6 and R7 When switch SW1 is pressed the WAKE pin is pulled LOW To test local wake up fun...

Страница 12: ...n specific voltage level such as via a pull up resistor to BAT in the evaluation setup Red LED D4 connected in series with resistor R5 turns on when LIMP is triggered UJA1169A UJA1169Ax EVB LIMP pin 1...

Страница 13: ...connected to the RSTN pin on the UJA1169A is also accessible on J3 and J5 UJA1169A UJA1169Ax EVB TXD pin 2 J3 01 or J4 18 RXD pin 7 J3 02 or J4 20 SDO pin 9 J3 03 or J4 09 SDI pin 3 J3 04 or J4 07 SCK...

Страница 14: ...ds A reset event is triggered by a LOW level on RSTN Details of reset functionality can be found in the UJA1169A data sheet 1 and application hints 2 UJA1169A UJA1169Ax EVB RSTN pin 8 J3 09 or J5 05 c...

Страница 15: ...For the UJA1169AXF EVB connect VEXT J3 10 to the peripheral loads that need a 5 V supply optional Once the above steps have been completed the ECU EVB can be powered up using an external battery supp...

Страница 16: ...SDO 2 SILK RXD SILK SCK SILK SDI 1 J3 SILK TXD HDR_1X2 JUMPER DEFAULT ON 2 1 J8 2 1 J7 20 18 16 14 12 10 8 6 4 2 19 17 15 13 11 9 7 5 3 1 2 4 6 8 10 12 14 16 J4 HDR_2X8 1 3 5 7 9 RSTN IOREF SILK IOREF...

Страница 17: ...FAULT ON 2 1 J8 2 1 J7 20 18 16 14 12 10 8 6 4 2 19 17 15 13 11 9 7 5 3 1 2 4 6 8 10 12 14 16 J4 HDR_2X8 1 3 5 7 9 RSTN IOREF SILK IOREF SILK GND SILK RST SILK VIN SILK 12 V SILK V1 SILK VIN 11 13 15...

Страница 18: ...DEFAULT ON 2 1 J8 2 1 J7 20 18 16 14 12 10 8 6 4 2 19 17 15 13 11 9 7 5 3 1 2 4 6 8 10 12 14 16 J4 HDR_2X8 1 3 5 7 9 RSTN IOREF SILK IOREF SILK GND SILK RST SILK VIN SILK 12 V SILK V1 SILK VIN 11 13 1...

Страница 19: ...0V PANASONIC preferred CR1206J 000ELF BOURNS alternative CR12064W000T VENKEL COMPANY alternative 15 1 R4 0 RES MF ZERO 1 4 W 1206 WR12X000 PTL WALSIN TECHNOLOGY CORP alternative ERJ 3GEYJ103V PANASONI...

Страница 20: ...NIC preferred CR1206J 000ELF BOURNS alternative CR12064W000T VENKEL COMPANY alternative 15 1 R4 0 RES MF ZERO 1 4 W 1206 WR12X000 PTL WALSIN TECHNOLOGY CORP alternative ERJ 3GEYJ103V PANASONIC preferr...

Страница 21: ...ONIC preferred CR1206J 000ELF BOURNS alternative CR12064W000T VENKEL COMPANY alternative 15 1 R4 0 RES MF ZERO 1 4 W 1206 WR12X000 PTL WALSIN TECHNOLOGY CORP alternative ERJ 3GEYJ103V PANASONIC prefer...

Страница 22: ...can be downloaded from www nxp com It includes the flexGUI PC installer see also Section 6 3 FlexGUI firmware for all supported microcontroller boards see also Section 6 2 1 6 2 Preparations for using...

Страница 23: ...s for firmware programming Figure 21 PC connection for firmware programming Figure 22 Copying the firmware file to the EVB S32K144 drive UM11758 All information provided in this document is subject to...

Страница 24: ...ls try again after a power off wait 3 seconds power on sequence on the UJA1169Ax EVB Once the FlexGUI firmware has been installed on the microcontroller board the jumpers on the boards need to be set...

Страница 25: ...3 of header J104 are connected with a jumper pushbutton SW5 on the MCU board allows the RSTN signal to be pulled LOW manually This function could be used for example when restoring the MTPNV register...

Страница 26: ...s the status while the FlexGUI configuration is being loaded Figure 27 Once loading is complete the FlexGUI start up window is displayed Figure 28 The red text in the lower left corner of the window i...

Страница 27: ...Figure 27 Window displayed during start up Figure 28 FlexGUI start up window boards not yet connected UM11758 All information provided in this document is subject to legal disclaimers NXP B V 2022 All...

Страница 28: ...rt to enable the connection The text in the lower left corner of the window should turn from red to green to indicate that the session has started successfully Figure 29 The FlexGUI functionality can...

Страница 29: ...for the microcontroller pins that control the red green and blue color components of the RGB LED on the microcontroller board A Low value selects a component a High value turns it off Figure 30 Intera...

Страница 30: ...t column If option Tree View is selected a single register may be selected Tree View is selected via the FlexGUI pop up window accessed under File Settings see Figure 32 Figure 32 Register map display...

Страница 31: ...prior read access is shown in the bottom row Figure 33 Advanced options for register map Register data is displayed in three formats As a single hexadecimal value for the entire register In text form...

Страница 32: ...ximum number of registers displayed via control field Registers Per Page see Figure 32 Figure 35 shows an example Register map view displaying the second page of the Transceiver control register group...

Страница 33: ...If a register has not been previously written to the selected rows are reinitialized with the default values as selected via the Use Register Init Value checkbox see Figure 33 For each register an OK...

Страница 34: ...gged in the Results window If the infinity option is selected when the script is executed it runs continuously in a loop The button changes to when a script is running Execution continues until halted...

Страница 35: ...ul Set default reset length to maximum and no auto start of VEXT SET_REG UJA1169AXF MTPNV and ID Registers Start up control 0x00 Set Software Development mode allow Sleep mode and set max reset thresh...

Страница 36: ...8 FlexGUI FINEST detail level selected for log window If the log window is not displayed click on the slider symbol under the File menu UM11758 All information provided in this document is subject to...

Страница 37: ...delay This needs to be taken into account when testing the Sleep mode command using the Register map tab or when executing scripts that include a Sleep mode command To resume GUI operation after the S...

Страница 38: ...is chip https www nxp com docs en data sheet UJA1169A pdf 2 AH1902 application hints Mini high speed CAN system basis chips UJA116xA available from NXP Semiconductors UM11758 All information provided...

Страница 39: ...software package overview 22 6 2 Preparations for using the S32K144EVB as a USB interface 22 6 2 1 FlexGUI firmware installation on S32K144EVB 22 6 2 2 HW setup for FlexGUI operation 24 6 3 Installin...

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