MEC1322 datasheet(166/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 166

 2014 - 2015 Microchip Technology Inc.

12.11 Runtime Registers

The registers listed in the Runtime Register Summary table are for a single instance of the Mailbox. The addresses of

each register listed in this table are defined as a relative offset to the host “Base Address” defined in the Runtime Reg-

ister Base Address Table.

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

12.11.1

MBX_INDEX REGISTER

12.11.2

MBX_DATA REGISTER

12.12 EC-Only Registers

The registers listed in the EC-Only Register Summary table are for a single instance of the Mailbox. 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 Reg-

ister Base Address Table.

The EC-Only registers can be accessed by the EC at the EC Offset from the Base Address. In addition, the registers

can be accessed through the Host Access Port, at the indexes listed in the following tables as “MBX_INDEX”.

TABLE 12-7:

RUNTIME REGISTER BASE ADDRESS TABLE

Block Instance

Instance Number

Host

Address Space

Base Address

Mailbox Interface

LPC

I/O

Programmed BAR

32-bit address

space

400F_2400h

TABLE 12-8:

RUNTIME REGISTER SUMMARY

Offset

MBX_INDEX Register

MBX_DATA Register

Offset

Bits

Description

Type

Default

Reset

Event

7:0 INDEX

The index into the mailbox registers listed in Table 12-10, "EC-Only

R/W

VCC1_R

ESET

and

PWRGD=

Offset

01h

Bits

Description

Type

Default

Reset

Event

7:0 DATA

Data port used to access the registers listed in Table 12-10, "EC-

Only Register Summary".

R/W

VCC1_R

ESET

and

PWRGD=

TABLE 12-9:

EC-ONLY REGISTER BASE ADDRESS TABLE

Block Instance

Instance Number

Host

Address Space

Base Address

Mailbox Interface

32-bit address

space

400F_2500h

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