MEC1404 Datasheet, PDF (265/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
16.15 Emulated 8042 Interface EC-Only Registers
The registers listed in the EC-Only Register Summary table are for a single instance of the Emulated 8042 Interface.
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.
TABLE 16-9: EC-ONLY REGISTER BASE ADDRESS TABLE
Block Instance
Emulated 8042
Interface
Instance Number
0
Host
EC
Address Space
32-bit address
space
Base Address
000F_0500h
The Base Address indicates where the first register can be accessed in a particular address space for a block instance.
TABLE 16-10: EC-ONLY REGISTER SUMMARY
Offset
0h
0h
4h
8h
Ch
14h
Register Name (Mnemonic)
HOST2EC Data Register
EC2Host Data Register
EC Keyboard Status Register
Keyboard Control Register
EC AUX Data Register
PCOBF Register
16.15.1 HOST2EC DATA REGISTER
Offset ^0h
Bits
Description
Type
7:0 HOST2EC_DATA
R
This register is an alias of the HOST_EC Data / CMD Register.
When read at the EC-Only offset of 0h, it returns the data written by
the Host to either Runtime Register offset 0h or Runtime Register
offset 04h.
Default
0h
Reset
Event
nSYSR
ST
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DS00001956D-page 265