MEC1322 Datasheet, PDF (121/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
Offset ^02h
Bits
Description
1:0 ACCESS_TYPE
This field defines the type of access that occurs when the EC Data
Register is read or written.
Type
R/W
11b=Auto-increment 32-bit access.
10b=32-bit access.
01b=16-bit access.
00b=8-bit access.
9.9.4
Each of these access types are defined in detail in Section 9.8.3,
"Access Types".
EC ADDRESS MSB REGISTER
Offset ^03h
Bits
Description
Type
7 REGION
R/W
The field specifies which of two segments in the 32-bit internal
address space is to be accessed by the EC_Address[14:2] to gener-
ate accesses to the memory.
1= The address defined by EC_Address[14:2] is relative to the base
address specified by the Memory Base Address 1 Register.
0= The address defined by EC_Address[14:2] is relative to the base
address specified by the Memory Base Address 0 Register.
6:0 EC_ADDRESS_MSB
R/W
This field defines bits[14:8] of EC_Address. Bits[1:0] of the EC_Ad-
dress are always forced to 00b.
9.9.5
The EC_Address is aligned on a DWord boundary. It is the address
of the memory being accessed by EC Data Byte 0 Register, which is
an offset from the programmed base address of the selected
REGION.
EC DATA BYTE 0 REGISTER
Offset ^04h
Bits
Description
Type
7:0 EC_DATA_BYTE_0
R/W
This is byte 0 (Least Significant Byte) of the 32-bit EC Data Register.
Use of the Data Byte registers to access EC memory is defined in
detail in Section 9.8.2, "EC Data Register".
Default
0h
Reset
Event
VCC1_R
ESET
Default
0h
Reset
Event
VCC1_R
ESET
0h
VCC1_R
ESET
Default
0h
Reset
Event
VCC1_R
ESET
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DS00001719D-page 121