MEC1322 Datasheet, PDF (124/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
9.9.13 APPLICATION ID REGISTER
Offset ^0Ch
Bits
Description
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.
Type
R/W
Default
0h
Reset
Event
VCC1_R
ESET
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.
Block Instance
Instance
Number
Host
Address Space
Base Address
EMI
0
EC
32-bit internal
address space
400F_0100h
The Base Address indicates where the first register can be accessed in a particular address space for a block instance.
Offset
Register Name (Mnemonic)
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
9.10.1 HOST-TO-EC MAILBOX REGISTER
Offset ^00h
Bits
Description
Type
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.
R/WC
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.
Default
0h
Reset
Event
VCC1_R
ESET
DS00001719D-page 124
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