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The TPM-Click board provides a TCG-standardized platform expanding trust from personal computing to connected devices. This board features the STMicroelectronics ST33KTPM2X, a STSAFE-TPM trusted platform module 2.0.

STSAFE is a secure element product range providing authentication, confidentiality and platform integrity services to protect OEMs against cloning, counterfeiting, malware injection and unauthorized production.

The TPM Click module is compatible with mikroBUS™, excluding usage of the +5V power supply.

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By default the TPM Click module use the I²C Bus for communication with the host. The maximum speed of the I²C Bus is 1MHz. If a higher throughput is required, then a SPI bus can be chosen. To select the SPI, the following parts must be populated: R3-R6, C1 and header JP1 must be closed.

The default Emcraft SW doesn’t support communication to TPM Click module via SPI.

Specification

TPM Click Electrical Specification

Pin-out

This table shows how the pin-out on TPM Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin	Image Added				Pin	Notes
	NC	1	AN	PWM	16	PP	Physical Presence, active high, internal pull-down. Used to indicate Physical Presence to the TPM.
Reset	nRST	2	RST	INT	15	nIRQ	TPM interrupt request to the host, active low
NC by default, optional SPI Chip (or Slave) Select	CS	3	CS	RX	14	NC
NC by default, optional SPI Serial Clock	SCK	4	SCK	TX	13	NC
NC by default, optional SPI Master Input, Slave Output	MISO	5	MISO	SCL	12	SCL	I2C Clock
NC by default, optional SPI Master Output, Slave Input	MOSI	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

 Onboard Settings

 References

1. DB5174 STSAFE-TPM trusted platform module 2.0 with a SPI or I²C interface https://www.st.com/resource/en/data_brief/st33ktpm2x.pdf

2. https://www.st.com/en/secure-mcus/st33ktpm2x.html#documentation