MEC1404 Datasheet, PDF (125/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
4.10 Runtime Registers
The runtime registers listed in Table 4-17, "Runtime Register Summary" are for a single instance of the LPC Interface.
The addresses of each register listed in TABLE 4-17: are defined as a relative offset to the host “Begin Address” define
in TABLE 4-2:.
TABLE 4-16: RUNTIME REGISTER ADDRESS RANGE TABLE
INSTANCE NAME
LPC Interface
INSTANCE
NUMBER
0
HOST
LPC
EC
ADDRESS
SPACE
I/O
32-bit internal
address space
BEGIN ADDRESS
Programmed BAR
000F_3000h
Note 1: The Begin Address indicates where the first register can be accessed in a particular address space for a
block instance.
2: The LPC Runtime registers are only accessible from the LPC interface and are used to implement the LPC
Configuration Port. They are not accessible by any other Host.
TABLE 4-17: RUNTIME REGISTER SUMMARY
Offset
00h
01h
Register Name
INDEX Register
DATA Register
Note: The LPC Runtime Register space has been used to implement the INDEX and DATA registers in the Con-
figuration Port. In CONFIG_MODE, the Configuration Port is used to access the Configuration Registers.
4.10.1 INDEX REGISTER
Offset ^00h
Bits
Description
Type
7:0 INDEX
R/W
The INDEX register, which is part of the Configuration Port, is used
as a pointer to a Configuration Register Address.
Note: For a description of accessing the Configuration Port
see Section 4.8.3, "Configuration Port," on page 110.
Default
0h
Reset
Event
nSYSR
ST
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