MEC1322 Datasheet, PDF (134/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
TABLE 10-7: EC-ONLY REGISTERS SUMMARY (CONTINUED)
EC
Offset
EC-Only Registers
Register Name (Mnemonic)
EC
Host
Access Offset
Aliased Runtime Register
Register Name (Mnemonic)
101h EC2OS Data EC Byte 1 Register
W
01h ACPI OS Data Register Byte 1
Register
102h EC2OS Data EC Byte 2 Register
W
02h ACPI OS Data Register Byte 2
Register
103h EC2OS Data EC Byte 3 Register
W
03h ACPI OS Data Register Byte 3
Register
Host
Access
R
R
R
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.
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
0
LPC
I/O
Programmed BAR
EC
32-bit internal
address space
400F_0C00h
ACPI-EC
1
LPC
I/O
Programmed BAR
EC
32-bit internal
address space
400F_1000h
The Base Address indicates where the first register can be accessed in a particular address space for a block instance
TABLE 10-9:
Offset
00h
01h
02h
03h
04h
04h
05h
06h
07h
RUNTIME REGISTER SUMMARY
Register Name (Mnemonic)
ACPI OS Data Register Byte 0 Register
ACPI OS Data Register Byte 1 Register
ACPI OS Data Register Byte 2 Register
ACPI OS Data Register Byte 3 Register
ACPI OS COMMAND Register
OS STATUS OS Register
OS Byte Control Register
Reserved
Reserved
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.
Offset ^00h
Bits
Description
7:0 ACPI_OS_DATA_BYTE_0
This is byte 0 of the 32-bit ACPI-OS DATA BYTES[3:0].
Type
R/W
Default
0h
Reset
Event
VCC1_R
ESET
DS00001719D-page 134
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