Industrial Safety Self-Test Library

IEC 61508 is an international standard for functional safety of Electrical, Electronic, and Programmable Electronic (E/E/PE) systems. It defines functional safety as part of the overall safety relating to an Equipment Under Control (EUC) or system. The EUC can be as simple as a switch or as complex as a Programmable Logic Controller (PLC). IEC 61508 encompasses four different Safety Integrity Levels (SILs), with SIL 1 having the lowest level and SIL 4 having the highest level of safety in E/E/PE systems.

We offer an SIL Self-Test Library (STL) for our 32-bit microcontrollers (MCUs) that was developed with our partner, embeX GmbH. This library is certified up to SIL 2 for a single MCU or single channel. The STL is part of an overall safety package that also includes a Safety Manual as well as a Safety Checklist to provide you with a solid foundation on which to build a system certified to the IEC 61508 Industrial Safety Standard.

Achieving Higher Safety Levels

For many functional safety applications, redundancy or a dual-channel solution can be created for implementing a higher safety level for SIL 3. For example, two MCUs using the SIL 2 STL can be used to achieve SIL 3 in an overall system.

The SIL 2/3 STL provides the following advantages:

Application independent for use in any simple to complex design
Certification by TÜV Rhineland, a recognized certification body
Compiler-independent object code for design flexibility
Software-based library to detect random hardware failures in the Arm^® Cortex^® M0+ core, Flash memory and SRAM
Diagnostic tests that are executed at startup and at run-time
Fault insertion tests to verify operation of the self-test diagnostic routines
Thoroughly tested diagnostic functions based on the device‘s architecture and available features to reduce development time
Reduced time and costs in certifying the end system/application

SIL 2/3 STL Licensing and Evaluation

The SIL 2/3 STL is available as an evaluation license with a development kit or as a full production license for the SAM D21 and SAM L21 safety-enabled devices. These devices have a “-SLL” suffix at the end of the part number, for example: ATSAMD21J18A-AU-SLL. To request additional information, please fill out and submit the request form.

Components Covered by the SIL 2/3 STL

The following elements are tested by the Self-Test Library with a Diagnostic Coverage (DC) of ≥ 90%:

Program Memory (ROM)
Data Memory (RAM)
RAM Address Lines
Stack
Core-Register
OpCodes
Special Function Register (SFR)

32-Bit Industrial Safety SIL Microcontrollers

More SAM D21 and SAM L21 devices can be added to the SIL 2/3 STL in addition to the base devices listed below and in the datasheet. Please contact your local Microchip Sales Office or use the form above to submit your request to have devices added.

New/Popular 32-bit Microcontroller Industrial Safety SIL Devices

View All Parametrics

Product	Status	Automotive Recommended	5K Pricing	Functional Safety Ready	Class B Safety Library	CPU Type	Architecture	Max CPU Speed (MHz)	Program Memory Size (KB)	RAM (KB)	DRAM Interface	Data EEPROM/HEF (Bytes)	SDIO/SD-CARD/eMMC	Temperature Range	Operation Voltage Range	Graphics Controller/GPU	Direct Memory Access Channels	ADC Input	Max ADC Resolution (Bits)	Number of DACs	USB Interface	Number of USB Modules	Number of Comparators	Timers	Capture/Compare/PWM Peripherals	Motor Control PWM Outputs	UART/SPI/I2C	Number of Op Amps	I2S	Peripheral Pin Select / Pin Muxing	Vbat/Vddbu battery backup	Low Power	External Memory Bus Interface	QSPI	Crypto Engine	Hardware Touch Peripheral	Number of CAN Modules	Type of CAN module	Ethernet	Pin count	Packages
ATSAMD21E16	In Production	Yes	$1.51	Yes	Yes	Cortex-M0+	32	48	64	8	No	0	0	-40 to 85	1.62V - 3.63V	No	12	10	12	0	Full Speed	1	2	5 x 16-bit 2 x 32-bit	6 -Std. PWM 16-bit PWM resolutions 6 -Input Capture	12	4 -UART 4 -SPI 4 -I2C	0	1	Yes	No	Yes	No	0	No	PTC	0	None	None	32	32/TQFP, 32/VQFN, 35/WLCSP
ATSAML21E16B	In Production	No	$2.24	Yes	No	Cortex-M0+	32	48	64	12	No	2048	0	-40 to 105	1.62V - 3.63V	No	16	10	12	2	Full Speed	1	2	5 x 16-bit 2 x 32-bit	18 -Std. PWM 0-bit PWM resolutions 6 -Input Capture	12	4 -UART 4 -SPI 4 -I2C	3	0	Yes	Yes	Yes	No	0	Yes	PTC	0	None	None	32	32/TQFP, 32/VQFN
PIC32CM1216MC00032	In Production	No	$1.70	Yes	Yes	Cortex-M0+	32	48	128	16		4096		-40 to 85	2.7V - 5.5V		12	10	12	1	None	0	2	5 x 16-bit 1 x 32-bit	4 -Std. PWM 24-bit PWM resolutions 4 -Input Capture	8	4 -UART 4 -SPI 0 -I2C	0	4	Yes	No		No				0		None	32	32/TQFP, 32/VQFN
PIC32CM1216MC00048	In Production	No	$1.80	Yes	Yes	Cortex-M0+	32	48	128	16		4096		-40 to 85	2.7V - 5.5V		12	14	12	1	None	0	2	5 x 16-bit 1 x 32-bit	4 -Std. PWM 24-bit PWM resolutions 4 -Input Capture	8	4 -UART 4 -SPI 0 -I2C	0	4	Yes	No		No				0		None	48	48/TQFP, 48/VQFN
ATSAMC20N17A	In Production	Yes	$2.04	Yes	Yes	Cortex-M0+	32	48	128	16	No	4096	0	-40 to 125	2.7V - 5.5V	No	6	12	12	0	None	0	4	8 x 16-bit 4 x 32-bit	16 -Std. PWM 32-bit PWM resolutions 16 -Input Capture	14	8 -UART 8 -SPI 8 -I2C	0	0	Yes	No	No	No	0	No	PTC	0	None	None	100	100/TQFP
ATSAMD21E17	In Production	Yes	$1.56	Yes	Yes	Cortex-M0+	32	48	128	16	No	0	0	-40 to 85	1.62V - 3.63V	No	12	10	12	0	Full Speed	1	2	5 x 16-bit 2 x 32-bit	6 -Std. PWM 16-bit PWM resolutions 6 -Input Capture	18	4 -UART 4 -SPI 4 -I2C	0	1	Yes	No	Yes	No	0	No	PTC	0	None	None	32	32/TQFP, 32/VQFN, 35/WLCSP
ATSAML21G17B	In Production	No	$2.50	Yes	No	Cortex-M0+	32	48	128	24	No	4096	0	-40 to 105	1.62V - 3.63V	No	16	14	12	2	Full Speed	1	2	5 x 16-bit 2 x 32-bit	20 -Std. PWM 0-bit PWM resolutions 6 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	3	0	Yes	Yes	Yes	No	0	Yes	PTC	0	None	None	48	48/TQFP, 48/VQFN
ATSAML21J17B	In Production	No	$2.63	Yes	No	Cortex-M0+	32	48	128	24	No	4096	0	-40 to 105	1.62V - 3.63V	No	16	20	12	2	Full Speed	1	2	5 x 16-bit 2 x 32-bit	24 -Std. PWM 0-bit PWM resolutions 10 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	3	0	Yes	Yes	Yes	No	0	Yes	PTC	0	None	None	64	64/TQFP, 64/VQFN, 64/WLCSP
ATSAMC20J18A	In Production	Yes	$1.84	Yes	Yes	Cortex-M0+	32	48	256	32	No	8192	0	-40 to 125	2.7V - 5.5V	No	6	12	12	0	None	0	2	5 x 16-bit 2 x 32-bit	10 -Std. PWM 32-bit PWM resolutions 10 -Input Capture	14	4 -UART 4 -SPI 4 -I2C	0	0	Yes	No	No	No	0	No	PTC	0	None	None	64	56/WLCSP, 64/TQFP, 64/VQFN
ATSAMC21E18A	In Production	Yes	$2.32	Yes	Yes	Cortex-M0+	32	48	256	32	No	8192	0	-40 to 125	2.7V - 5.5V	No	12	10	12	1	None	0	4	5 x 16-bit 2 x 32-bit	10 -Std. PWM 32-bit PWM resolutions 10 -Input Capture	14	4 -UART 4 -SPI 4 -I2C	0	0	Yes	No	No	No	0	No	PTC	1	CAN-FD	None	32	32/TQFP, 32/VQFN
ATSAMC21G18A	In Production	Yes	$2.44	Yes	Yes	Cortex-M0+	32	48	256	32	No	8192	0	-40 to 125	2.7V - 5.5V	No	12	12	12	1	None	0	4	5 x 16-bit 2 x 32-bit	10 -Std. PWM 32-bit PWM resolutions 10 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	0	0	Yes	No	No	No	0	No	PTC	2	CAN-FD	None	48	48/TQFP, 48/VQFN
ATSAMC21J18A	In Production	Yes	$2.32	Yes	Yes	Cortex-M0+	32	48	256	32	No	8192	0	-40 to 125	2.7V - 5.5V	No	12	12	12	1	None	0	4	5 x 16-bit 2 x 32-bit	10 -Std. PWM 32-bit PWM resolutions 10 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	0	0	Yes	No	No	No	0	No	PTC	2	CAN-FD	None	64	56/WLCSP, 64/TQFP, 64/VQFN
ATSAMC21N18A	In Production	Yes	$2.90	Yes	Yes	Cortex-M0+	32	48	256	32	No	8192	0	-40 to 125	1.62V - 5.5V	No	12	22	12	1	None	0	2	5 x 16-bit 2 x 32-bit	10 -Std. PWM 32-bit PWM resolutions 8 -Input Capture	16	8 -UART 8 -SPI 8 -I2C	0	8	Yes	No	No	No	0	No	PTC	2	CAN-FD	None	100	100/TQFP
ATSAMD21E18	In Production	Yes	$2.16	Yes	Yes	Cortex-M0+	32	48	256	32	No	0	0	-40 to 85	1.62V - 3.63V	No	12	10	12	0	Full Speed	1	2	5 x 16-bit 2 x 32-bit	6 -Std. PWM 16-bit PWM resolutions 6 -Input Capture	12	4 -UART 4 -SPI 4 -I2C	0	1	Yes	No	Yes	No	0	No	PTC	0	None	None	32	32/TQFP, 32/VQFN
ATSAMD21G18	In Production	Yes	$2.27	Yes	Yes	Cortex-M0+	32	48	256	32	No	0	0	-40 to 85	1.62V - 3.63V	No	12	14	12	0	Full Speed	1	2	5 x 16-bit 2 x 32-bit	6 -Std. PWM 16-bit PWM resolutions 6 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	0	1	Yes	No	Yes	No	0	No	PTC	0	None	None	48	45/WLCSP, 48/TQFP, 48/VQFN
ATSAMD21J18	In Production	Yes	$2.39	Yes	Yes	Cortex-M0+	32	48	256	32	No	0	0	-40 to 85	1.62V - 3.63V	No	12	20	12	0	Full Speed	1	2	5 x 16-bit 2 x 32-bit	10 -Std. PWM 16-bit PWM resolutions 8 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	0	1	Yes	No	Yes	No	0	No	PTC	0	None	None	64	64/TQFP, 64/UFBGA, 64/VQFN
ATSAML21E18B	In Production	No	$3.32	Yes	No	Cortex-M0+	32	48	256	40	No	8192	0	-40 to 105	1.62V - 3.63V	No	16	10	12	2	Full Speed	1	2	5 x 16-bit 2 x 32-bit	18 -Std. PWM 0-bit PWM resolutions 6 -Input Capture	12	4 -UART 4 -SPI 4 -I2C	3	0	Yes	Yes	Yes	No	0	Yes	PTC	0	None	None	32	32/TQFP, 32/VQFN
ATSAML21G18B	In Production	No	$3.48	Yes	No	Cortex-M0+	32	48	256	40	No	8192	0	-40 to 105	1.62V - 3.63V	No	16	14	12	2	Full Speed	1	2	5 x 16-bit 2 x 32-bit	20 -Std. PWM 0-bit PWM resolutions 6 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	3	0	Yes	Yes	Yes	No	0	Yes	PTC	0	None	None	48	48/TQFP, 48/VQFN
ATSAML21J18B	In Production	No	$3.65	Yes	No	Cortex-M0+	32	48	256	40	No	8192	0	-40 to 105	1.62V - 3.63V	No	16	20	12	2	Full Speed	1	2	5 x 16-bit 2 x 32-bit	24 -Std. PWM 0-bit PWM resolutions 10 -Input Capture	14	6 -UART 6 -SPI 6 -I2C	3	0	Yes	Yes	Yes	No	0	Yes	PTC	0	None	None	64	64/TQFP, 64/VQFN, 64/WLCSP

TÜV Certificate

Title	Download
TuV Rheinland Certificate - IEC 61508 SIL 2/3 STL for Arm® Cortex®-M0+ MCUs	Download

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