Signal

Type

Description

SPI_PIRQ Output SPI IRQ, active low, open drain, used by TPM to generate an interrupt

PP

Input

Physical Presence, active high, internal pull-down. Used to indicate Physical Presence.

GPI

Input

Used for activation and deactivation of the TPM Standby mode (

is not used, connect an external pull-up resistor (10 kΩ) to this pad.

NiC

-

Not internally connected: not connected to the die. May be left unconnected but no impact on TPM if

connected.

Note:

The VQFN32 package has a central pad (PIN33) on the bottom, which is not connected to the die. This pin does

not impact the TPM, be it connected or not.

ST33TPHF2ESPI

Pin and signal description

DB2716 - Rev 4

page 6/26