C200 datasheet(42/82 Pages) INTEL

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Specification Clarifications

Specification Update

23.

ACPRESENT Definition

Table 2-8 Power Management Interface Signals is modified as shown:

24.

SPI Overview

The Serial Peripheral Interface (SPI) subsection of section 1.2.1 Capability Overview is

replaced as follows:

The PCH provides an SPI Interface and is required to be used on the platform in order

to provide chipset configuration settings and Intel ME firmware. If integrated Gigabit

Ethernet MAC/PHY is implemented on the platform, the interface is used for this device

configuration settings. The interface may also be used as the interface for the BIOS

flash device or alternatively a FWH on LPC may be used. The PCH supports up to two

SPI flash devices using two chip select pins with speeds up to 50 MHz.

§ §

MGPIO6

GPIO27

MGPIO7

GPIO28

MGPIO8

SML1ALERT#/PCHHOT#/GPIO74

Table 2-27 Server MGPIO Signal to Pin Name Conversion Table (Sheet 2 of 2)

MGPIO

Ballout Pin Name

Name

Type

Description

ACPRESENT

(Mobile Only)

/ GPIO31

ACPRESENT: This input pin indicates when the platform is plugged

into AC power or not. In addition to the previous Intel® ME to EC

communication, the PCH uses this information to implement the Deep

S4/S5 policies. For example, the platform may be configured to enter

Deep S4/S5 when in S4 or S5 and only when running on battery. This

is powered by Deep S4/S5 Well.

Mobile: This GPIO pin is permanently appropriated by the Intel ME for

ACPRESENT function.

Desktop: This pin is only GPIO31, ACPRESENT is not supported.

NOTE: This signal is muxed with GPIO31 but GPIO_USE_SEL[31] is

internally hardwired to a 1b, which means GPIO mode is

permanently selected and cannot be changed.

C200 Datasheet(PDF) 42 Page - Intel Corporation

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