ATTPM20P datasheet(5/22 Pages) MICROCHIP

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Pin Type

Description

PIRQ#

Open Drain

Output

SPI Interrupt Pin, active-low. This pin is used by the TPM to assert

interrupts. If unused, this pin should be tied to ground directly or

through a 4.7 kΩ resistor.

SPI_CLK

Clock Input

Input Clock to drive the SPI bus. This pin should be asserted high

for power savings when the TPM is not in use.

SPI_CS#

Input

SPI_CS# Chip Select, active-low. The TPM device will be selected

when the chip select is asserted LOW.

SPI_RST#

Input

SPI Reset Pin, active-low. Pulsing this signal low resets the internal

state of the TPM, and is equivalent to removal/restoration of power

to the device. The required minimum reset pulse width is 2 µs. On

power-up, it is critical that reset be kept active-low until VCC and

SPI_CLK stabilize. To be compliant with TCG requirements, this pin

needs to be tied to system reset. TPM_Init is indicated by asserting

this pin.

ATTPM20P

Pin Configurations and Pinouts

Datasheet Summary

DS40002082A-page 5

ATTPM20P Datasheet(PDF) 5 Page - Microchip Technology