MEC1322 datasheet(124/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 124

 2014 - 2015 Microchip Technology Inc.

9.9.13

APPLICATION ID REGISTER

9.10

EC-Only Registers

The registers listed in the EC-Only Register Summary table are for a single instance of the Embedded Memory Interface

(EMI). The addresses of each register listed in this table are defined as a relative offset to the host “Base Address”

defined in the EC-Only Register Base Address Table.

The Base Address indicates where the first register can be accessed in a particular address space for a block instance.

9.10.1

HOST-TO-EC MAILBOX REGISTER

Offset

0Ch

Bits

Description

Type

Default

Reset

Event

7:0 APPLICATION_ID

When this field is 00h it can be written with any value. When set to a

non-zero value, writing that value will clear this register to 00h.

When set to a non-zero value, writing any value other than the cur-

rent contents will have no effect.

R/W

VCC1_R

ESET

Block Instance

Instance

Number

Host

Address Space

Base Address

EMI

32-bit internal

address space

400F_0100h

Offset

00h

HOST-to-EC Mailbox Register

01h

EC-to-HOST Mailbox Register

04h

Memory Base Address 0 Register

08h

Memory Read Limit 0 Register

0Ah

Memory Write Limit 0 Register

0Ch

Memory Base Address 1 Register

10h

Memory Read Limit 1 Register

12h

Memory Write Limit 1 Register

14h

Interrupt Set Register

16h

Host Clear Enable 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/WC

VCC1_R

ESET

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