SSX35 datasheet(7/14 Pages) ETC1

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SSX35 Trusted platform module (TPM)

Table 4-1

Signal

Pin(s)

Type

Description

LAD[3:0]

26, 23, 20, 17

Multiplexed Command, Address and

Data BUS

(see LPC Interface Spec)

LPCPD#

power down

LCLK

33MHz clock

(see LPC Interface Spec).

LFRAME#

Frame

indicates start of a new LPC

cycle, termination of broken cycle (see

LPC Interface Spec)

LRESET#

System reset signal

(see LPC Interface Spec)

SERIRQ

Serialized IRQ

is used to handle interrupt

support (see LPC Interface Spec)

CLKRUN#/GPIO

Same as PCI CLKRUN#. Active Low.

internal pull-down

GPIO will default to low.

I,BI

Physical Presence, active high, internal

pull-down. Used to indicate Physical

Presence to the TPM.

3,13,14

Do not connect

GPIO

Defaults high. (weak internal pull-up)

GPIO

Defaults high (weak internal pull-up)

GPIO6

GPIO Defaults high (weak internal

pull-up)

TESTI

This pin will be pulled low on

motherboard. Assuming: Pull high to

enable Test mode. Pull low to disable

Test mode and enable GPIO on pin

9(TESTBI)

TESTBI/GPIO

TESTBI: Test port. If TESTI is pulled low

acts as a GPIO.

GPIO will default high(weak internal

pull-up)

Power

10, 19 24

This is a 3.3 volt DC power.

The maximum power for this interface is

250 ma.

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