ST33TPHF20SPI datasheet(9/47 Pages) STMICROELECTRONICS

9 / 47 page

FIPS140-2 SECURITY POLICY

Page 9 of 47

NON-PROPRIETARY DOCUMENT

Next table gives a description of the products pins.

Table 6: ST33TPHF20 Pin definition (SPI configuration)

Signal

Type

Description

VPS

Input

Power supply. This pin must be connected to 1.8V or 3.3V DC

power rail supplied by the motherboard.

GND

Input

GND has to be connected to the main motherboard ground.

SPI_RST

Input

SPI Reset used to re-initialize the device

MISO

Output

SPI Master Input, Slave Output (output from slave)

MOSI

Input

SPI Master Output, Slave Input (output from master)

SPI_CLK

Input

SPI serial clock (output from master)

SPI_CS

Input

SPI slave select (active low; output from master)

SPI_PIRQ

Output

SPI IRQ used by TPM to generate an interrupt

Input

Physical presence, active high, internal pull-down. Used to

indicate Physical Presence to the TPM.

NiC

Not internally connected: not connected to the die. May be left

unconnected but no impact on TPM if connected.

Not Connected: connected to the die but not usable. May be left

unconnected. Internal pull-down.

ST33TPHF20SPI Datasheet(PDF) 9 Page - STMicroelectronics