MEC1322 datasheet(120/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 120

 2014 - 2015 Microchip Technology Inc.

9.9.1

HOST-TO-EC MAILBOX REGISTER

9.9.2

EC-TO-HOST MAILBOX REGISTER

9.9.3

EC ADDRESS LSB REGISTER

Offset

00h

Bits

Description

Type

Default

Reset

Event

7:0 HOST_EC_MBOX

8-bit mailbox used communicate information from the system host to

the embedded controller. Writing this register generates an event to

notify the embedded controller.

The embedded controller has the option of clearing some or all of the

bits in this register. This is dependent on the protocol layer imple-

mented using the EMI Mailbox. The host must know this protocol to

determine the meaning of the value that will be reported on a read.

This bit field is aliased to the HOST_EC_MBOX bit field in the

HOST-to-EC Mailbox Register

R/W

VCC1_R

ESET

Offset

01h

Bits

Description

Type

Default

Reset

Event

7:0 EC_HOST_MBOX

8-bit mailbox used communicate information from the embedded

controller to the system host. Writing this register generates an event

to notify the system host.

The system host has the option of clearing some or all of the bits in

this register. This is dependent on the protocol layer implemented

using the EMI Mailbox. The embedded controller must know this pro-

tocol to determine the meaning of the value that will be reported on a

read.

This bit field is aliased to the EC_HOST_MBOX bit field in the EC-to-

HOST Mailbox Register

R/WC

VCC1_R

ESET

Offset

02h

Bits

Description

Type

Default

Reset

Event

7:2 EC_ADDRESS_LSB

This field defines bits[7:2] of EC_Address [15:0]. Bits[1:0] of the

EC_Address are always forced to 00b.

The EC_Address is aligned on a DWord boundary. It is the address

of the memory being accessed by EC Data Byte 0 Register, which is

an offset from the programmed base address of the selected

REGION.

R/W

VCC1_R

ESET

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