MEC1322 datasheet(134/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 134

 2014 - 2015 Microchip Technology Inc.

10.12 Runtime Registers

The registers listed in the Runtime Register Summary table are for two instances of the

ACPI Embedded Controller

Interface (ACPI-ECI). The addresses of each register listed in this table are defined as a relative offset to the host

“Base Address” defined in the Runtime Register Base Address Table.

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

10.12.1

ACPI OS DATA REGISTER BYTE 0 REGISTER

This register is aliased; see ACPI-OS DATA BYTES[3:0] on page 135, OS2EC DATA BYTES[3:0] on page 141, and

EC2OS DATA BYTES[3:0] on page 142 for detailed description of access rules.

101h

EC2OS Data EC Byte 1 Register

W01h

ACPI OS Data Register Byte 1

102h

EC2OS Data EC Byte 2 Register

W02h

ACPI OS Data Register Byte 2

103h

EC2OS Data EC Byte 3 Register

W03h

ACPI OS Data Register Byte 3

Note:

The Runtime registers may be accessed by the EC but typically the Host will access the Runtime Registers

and the EC will access just the EC-Only registers.

TABLE 10-8:

RUNTIME REGISTER BASE ADDRESS TABLE

Block Instance

Instance

Number

Host

Address Space

Base Address

ACPI-EC

LPC

I/O

Programmed BAR

32-bit internal

address space

400F_0C00h

ACPI-EC

LPC

I/O

Programmed BAR

32-bit internal

address space

400F_1000h

TABLE 10-9:

RUNTIME REGISTER SUMMARY

Offset

00h

ACPI OS Data Register Byte 0 Register

01h

ACPI OS Data Register Byte 1 Register

02h

ACPI OS Data Register Byte 2 Register

03h

ACPI OS Data Register Byte 3 Register

04h

ACPI OS COMMAND Register

04h

OS STATUS OS Register

05h

OS Byte Control Register

06h

Reserved

07h

Reserved

Offset

00h

Bits

Description

Type

Default

Reset

Event

7:0 ACPI_OS_DATA_BYTE_0

This is byte 0 of the 32-bit ACPI-OS DATA BYTES[3:0].

R/W

VCC1_R

ESET

TABLE 10-7:

EC-ONLY REGISTERS SUMMARY (CONTINUED)

Offset

EC-Only Registers

Access

Host

Offset

Aliased Runtime Register

Host

Access

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