1 Introduction
The S32K series further extends the highly scalable portfolio of ARM
®
Cortex
®
MCUs in the automotive industry. It builds on the legacy of the KEA
series, whilst introducing higher memory options alongside a richer peripheral
set extending capability into a variety of automotive applications.
With a 2.70–5.5 V supply and focus on automotive environment robustness,
the S32K series devices are well suited to a wide range of applications in
electrical harsh environments. These devices are optimized for cost-sensitive
applications offering low pin-count options.
The S32K series offers a broad range of memory, peripherals, and package
options. They share common peripherals and pin counts allowing developers
to migrate easily within the MCU family or among the MCU families to take
advantage of more memory or feature integration. This scalability allows
developers to standardize on the S32K series for their end product platforms,
maximizing hardware and software reuse and reducing timeto-market.
Following are the general features of the S32K series MCUs:
• 32-bit ARM Cortex-M4 core with IEEE-754 compliant FPU, executing up
to 112 MHz
• Scalable memory footprints up to 2 MB flash and up to 256 KB SRAM
• Precision mixed-signal capability with on chip analog comparators and
multiple 12-bit ADCs
• Powerful timers for a broad range of applications including motor control,
lighting control and body applications
• Serial communication interfaces such as LPUART, LPSPI, LPI2C,
FlexCAN, CAN-FD, FlexIO and so on.
• SHE specification compliant security module
• Single power supply (2.70–5.5 V) with full functional flash program/
erase/read operations
• Functional safety compliance with ISO26262, with internal watchdog,
voltage monitors, clock monitors, memory protection and ECC
• Ambient operation temperature range: –40 °C to 125°C
• Software enablement: S32 Software Development Kit (SDK), S32 Design Studio (S32DS)
2 S32K family comparison
Please refer to the latest version of the Reference Manual for details.
Contents
1 Introduction..........................................1
2 S32K family comparison..................... 1
3 Power supplies.................................... 2
3.1 Bulk and decoupling
capacitors ............................... 3
4 Clock circuitry......................................3
4.1 EXTAL and XTAL pins.............3
4.2 Suggestions for the PCB
layout of oscillator circuit......... 4
5 Debug and programing interface....... 5
5.1 Debug connector pinouts........ 6
5.2 RESET system...................... 11
6 Analog comparator interface............ 11
7 Communication modules.................. 13
7.1 LIN interface for LPUART
module...................................13
7.2 CAN interface for FlexCAN
module...................................17
7.3 Inter-Integrated Circuit IIC......20
7.4 Ethernet MAC Interface......... 22
8 Quad Serial Peripheral Interface...... 23
9 Unused pins....................................... 26
10 General board layout guidelines.... 27
10.1 Traces recommendations.... 27
10.2 Grounding .......................... 27
10.3 EMI/EMC and ESD
considerations for layout....... 28
11 PCB layer stacking...........................30
12 Injection current...............................31
13 References........................................31
14 Revision history............................... 31
AN5426
Hardware Design Guidelines for S32K1xx Microcontrollers
Rev. 3 — December 2018
Application Note
