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Part Number Here
Quick Start Guide
Evaluation Board for SJA1124 SPI to Quad-LIN Bridge
ArduinoTMUNO footprint-compatible LIN Communication Shield
SJA1124EVB
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Quick Start Guide
GET TO KNOW THE SJA1124 EVALUATION
BOARD
INHN
Indicator LEDs
4 x SJA1124
VIO Supply
Indicator LED
16 x LIN
Master
Figure 1: Front side of SJA1124EVB
External
Power Supply
(5-16V)
Power Supply
Indicator LED
J3 Header J4 Header
J2 Header J1 Header
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Power
Synchronous
LIN frame
transmission
SPI Chip
Selects
SPI
CLK
SPI Chip
Selects
Interrupt
Figure 2: SJA1124EVB footprint
SJA1124EVB
Arduino
TM
UNO footpint-compatible shield
The SJA1124 EVB has the standard-based form factor compatible with
ArduinoTMUNO pin layout, that enables rapid prototyping with a wide range
of microcontroller development boards.
Example: SJA1124EVB + S32K144EVB
Status
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Quick Start Guide
FEATURES
• 4 x SJA1124A
• SPI to LIN bridge
• Supports 16 x LIN master
channel connectors
• Arduino
TM
UNO footprint-
compatible shield
• Easy access to I/O header pins
• Power LED indicator
• VIO LED indicator
• INHN LED indicators
• Small form factor
STEP-BY-STEP
INSTRUCTIONS
This section describes how to use the
SJA1124 evaluation board as a hardware
plug-in board (shield) that supports up to
16 LIN master connections when plugged
on existing microcontroller development
boards.
The supply connector pin mapping of
J3 Header must be checked against
microcontroller board supply
connector. VBAT is the power supply
voltage (max 16V). VDD (3.3V / 5V),
P3V3 (3.3V) and P5V0 (5V) are
reference voltages. Otherwise
SJA1124 and other components on
the boards can be damaged.
Verification of Supply
Setting
1
Figure 3: J3 Header (supply connector)
MICROCONTROLLER
BOARD COMPATIBILITY
• S32K14xEVB
• DEVKIT-MPC574x
• DEVKIT-S12x
• FRDM-KEAx
• etc.
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For adaptation to the digital interface
levels of the connected microcontroller
provides the SJA1124 a VIO
reference voltage pin. Default
SJA1124EVB setting for VIO pin
mapping is J3-3 (VDD).
As alternative J3-4 (P3V3) or J3-4
(P5V0) can be used by populating a
zero-ohm resistor to the appropriate
placeholder. See Figure 4.
Note: Only one placeholder of R33,
R34 and R35 shall be populated with
a zero-ohm resistor. Otherwise
different voltage sources are shorted
and damage on the microcontroller
development boards might occur.
Digital Interface Voltage
Setting
2
STEP-BY-STEP INSTRUCTIONS (cont.)
For the baud rate generators a
reference clock CLK (0.4 … 10 MHz)
must be provided. Default
SJA1124EVB setting for CLK pin
mapping is J2-2 (CLK1_SJA).
As alternative J2-1 (CLK2_SJA) or
J1-5 (CLK3_SJA) can be used by
populating a zero-ohm resistor to the
appropriate placeholder. See Figure 5.
Reference Clock
Setting
3
Figure 4: VIO pin mapping
configuration options
Figure 5: CLK pin mapping configuration
options
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Quick Start Guide
J1 Header
Resistor
Default
Setting
Signal
Description
J1-1 - - - Not connected
J1-2 - - - Not connected
J1-3 R19 0 INTN_SJA Shared SJA1124 interrupt output
J1-4 R18 0 STAT_SJA Shared SJA1124 SPI status output
J1-5 R28 open CLK3_SJA Alternative SJA1124 clock reference
J1-6 - - Not connected
J1-7 R25 0 SCSN_SJA0 SJA1124 SPI chip select input #0
J1-8 R55 0 SCSN_SJA1 SJA1124 SPI chip select input #1
J1 HEADER – DEFAULT SETTING
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J2 HEADER – DEFAULT SETTING
J2 Header
Resistor
Default
Setting
Signal
Description
J2-1 R27 open CLK2_SJA Alternative SJA1124 clock reference
J2-2 R26 0 CLK1_SJA SJA1124 clock reference
J2-3 - - - Not connected
J2-4 R21 0 SDI_SJA Shared SJA1124 SPI slave data input
J2-5 R22 0 SDO_SJA Shared SJA1124 SPI slave data output
J2-6 R20 0 SCK_SJA Shared SJA1124 SPI slave clock input
J2-7 - - GND Ground
J2-8 - - - Not connected
J2-9 - - - Not connected
J2-10 - - - Not connected
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Quick Start Guide
J3 Header
Resistor
Default
Setting
Signal
Description
J3-1 - - VBAT Power supply
J3-2 R33 0 VDD SJA1124 VIO reference voltage
J3-3 - - - Not connected
J3-4 R34 open P3V3 Alternative SJA1124 VIO reference voltage
J3-5 R35 open P5V0 Alternative SJA1124 VIO reference voltage
J3-6 - - GND Ground
J3-7 - - GND Ground
J3-8 - - VBAT Power supply
J3 HEADER – DEFAULT SETTING
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J4 HEADER – DEFAULT SETTING
J4 Header
Resistor
Default
Setting
Signal
Description
J4-1 R17 0 TMF_SJA Shared SJA1124 transmit frame input
J4-2 - - - Not connected
J4-3 R45 0 SCSN_SJA2 SJA1124 SPI chip select input #2
J4-4 R24 0 SCSN_SJA3 SJA1124 SPI chip select input #3
J4-5 - - - Not connected
J4-6 - - - Not connected
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Quick Start Guide
J1 PWR HEADER – POWER SUPPLY
J1 PWR Header
Signal
Description
J1PWR-1 VBAT Power supply
J1PWR-2 GND Ground
J1PWR-3 GND Ground
Figure 8: Power supply circuit
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J5 – J20 HEADER – LIN BUS
Jx
Header
(
J5 – J20)
Resistor
Default
Setting
Signal
Description
Jx-1 Rx 0 LINx LIN bus
Jx-2 - - VBAT Power supply
Jx-3 - - - Not connected
Jx-4 - - GND Ground
Figure 8: LIN circuit at SJA1124
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respective owners. © 2018 NXP B.V.
SUPPORT
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WARRANTY
Visit www.nxp.com/warranty for complete
warranty information.
Document Number: TR1821 REV 1
Get Started
Download example software and
documentation from NXP
DocStore (NDA required)
www.docstore.nxp.com.
In-Vehicle Networking LIN
SJA1124
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