Automotive general evaluation board solution based on S32K1xx series

The S32K1xx series is an automotive industrial-grade MCU based on ARM®Cortex®-M0+/M4F, providing a scalable platform with next-generation security, scalability, connectivity and low power consumption. It is suitable for a wide range of power electronics applications that may work in harsh environments, and is also suitable for low-cost applications that need to make full use of pins.

This solution is aimed at general automotive applications, provides a rich test component, on-board CAN, LIN and UART/SCI interfaces, and has two power supply options: microUSB and 12V power supply, which can help users quickly get started with the development of S32K1xx related application designs. In addition, the free development integrated environment S32DS launched by NXP allows users to quickly familiarize themselves with the S32K series MCU and quickly complete product prototype verification, which can greatly shorten the product development cycle and meet the rapidly developing market demand for automotive electronics products.

S32K1xx key features:

• ARM® Cortex® M0+/M4F core

• RAM and Flash also support up to 256KB (RAM) and 2MB (Flash)

• Scalable low-power run and stop modes. Fast wake-up, clock and power gating

• With DSP instruction set and single-precision floating point processing unit (FPU)

• The maximum frequency can run up to 112MHz

• ADC has two independent 12-bit precision SAR type ADC modules (16 channels per module, 32 channels in total)

• Supports FlexIO and hardware encryption module CSEc, as well as more abundant timer modules

• Supports functional safety ISO-26262 ASIL-B level, NXP provides Safety Manual and FMEDA

• Ethernet (10/100 Mbps), CAN FD, FlexIO (UART, I2C, SPI, I2S, LIN, PWM...), SAI, QSPI

• CAN supports up to 3 FlexCANs, all of which support CAN-FD (S32K148)

• Free software development integrated environment - S32DS for ARM, and software development kit (SDK) with integrated Processor Expert graphical configuration peripheral low-level driver (LLD)
  

►Scenario application diagram

►Product physical image

► Display board photos

►Solution Block Diagram

► Human Machine Interface (HMI mapping)

►Core technology advantages

The evaluation board size is 55 * 98 (mm), which is light and convenient to use.

You can choose to mount two S32K1xx MCUs in 48-LQFP or 100-LQFP (the example on this board is S32K144/S32K116).

With two power supply options: Micro-USB or DC-12V power supply, flexible optional 5V or 3.3V main control MCU power supply.

Select automotive-grade power chips with high efficiency, high voltage resistance and an ambient temperature range of -40°C to 125°C.

S32K116 (1-channel)/S32K144 (2-channel) CAN PHY peripheral module, supporting CAN-FD.

1 LIN PHY peripheral module. 

Components: 1*RGB LED, 2*User Buttons, 1*Potentiometer 

Supports JTAG standard debug interface and JTAG 4-wire SWD debug mode.

Ambient temperature range: -40℃ to 105℃ in HSRUN mode and -40℃ to 125℃ in RUN mode.

The peripherals and interface resources cover most of the functions of the S32K1xx chip. Using this evaluation board can meet the basic application design needs of developers and accelerate the early R&D progress to a certain extent.

►Solution Specifications

The main ICs selected on the evaluation board are:

1. The main control MCU (S32K144) has been briefly introduced above and will not be repeated here.

2. Automotive-grade high-speed CAN transceiver (TJA1044GT/3)

Specification:

Fully compliant with ISO 11898-2:2003, ISO 11898-5:2007 and ISO 11898-6:2013 standards

Provides an optimized feature set for 12V automotive applications

The CAN bus has ideal passive performance when the power is disconnected.

Very low current standby mode with host and bus wake-up capabilities

Excellent EMC performance at speeds up to 500Kbit/s

In CAN FD fast phase, data rate up to 5Mbit/s

The VIO input on the TJA1044X/3 variants allows direct connection to a microcontroller with a supply voltage of 3~5V

3. Automotive-grade high-speed LIN transceiver (TJA1021T/20)

Specifications: 

Compliant with LIN 2.1/SAE J2602 standards

Baud rate up to 20 kBd 

Very low electromagnetic radiation (EME) and high electromagnetic interference immunity (EMI) 

Very low power consumption in sleep mode, and in fault mode, power consumption is minimized

Can be operated passively without power supply

Integrated termination resistor for LIN slave applications 

Wake-up source identification (local or remote) 

K-line compatible

The input level is compatible with 3V and 5V devices and can be directly connected to the MCU microcontroller

4. Automotive-grade DC/DC (Silergy SA24403) specifications: 

Internal 1ms soft start to limit inrush current

Adjustable switching frequency range: 300kHz to 2.2MHz 

Input voltage range: 4.2~40V; maximum output current 3.5A 

Reference ±2% 0.6V Ambient temperature range: -40°C~125°C 

Cycle-by-cycle peak current limiting, current protection

RoHS compliant

Automotive grade AEC-Q100 Grade 1 certification

5. Automotive-grade LDO (Silergy SA21345A) specifications: 
Input voltage range: 4V~36V, input enable controllable 
Ultra-low quiescent current, extremely low shutdown current 
Excellent load and linear regulation 
Maximum load current 300mA 

Overcurrent protection, overtemperature shutdown

Automotive grade AEC-Q100 Grade 1 certification