MEC1322 Datasheet, PDF (126/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
9.10.5 MEMORY WRITE LIMIT 0 REGISTER
Offset ^0Ah
Bits
Description
15 Reserved
14:2 MEMORY_WRITE_LIMIT_0
Whenever a write of any byte in EC DATA Register is attempted and
bit 15 of EC_Address is 0, the field EC_ADDRESS_MSB in the
EC_Address Register is compared to this field. As long as EC_Ad-
dress[14:2] is less than Memory_Write_Limit_0[14:2] the addressed
bytes in the EC DATA Register will be written into the internal 24-bit
address space. If EC_Address[14:2] is greater than or equal to the
Memory_Write_Limit_0[14:2] no writes will take place.
1:0 Reserved
9.10.6 MEMORY BASE ADDRESS 1 REGISTER
Type
R
R/W
R
Offset ^0Ch
Bits
Description
Type
31:2 MEMORY_BASE_ADDRESS_1
R/W
This memory base address defines the beginning of region 1 in the
Embedded Controller’s 32-bit internal address space. Memory allo-
cated to region 1 is intended to be shared between the Host and the
EC. The region defined by this base register is used when bit 15 of
the EC Address Register is 1. The access will be to a memory loca-
tion at an offset defined by the EC_Address relative to the beginning
of the region defined by this register. Therefore, a read or write to the
memory that is triggered by the EC Data Register will occur at Mem-
ory_Base_Address_1 + EC_Address.
1:0 Reserved
R
Default
-
0h
Reset
Event
-
VCC1_R
ESET
-
-
Default
0h
Reset
Event
VCC1_R
ESET
-
-
9.10.7 MEMORY READ LIMIT 1 REGISTER
Offset ^10h
Bits
Description
15 Reserved
14:2 MEMORY_READ_LIMIT_1
Whenever a read of any byte in the EC Data Register is attempted,
and bit 15 of EC_ADDRESS is 1, the field EC_ADDRESS in the
EC_Address_Register is compared to this field. As long as EC_AD-
DRESS is less than this value, the EC_Data_Register will be loaded
from the 24-bit internal address space.
1:0 Reserved
Type
R
R/W
R
Default
-
0h
Reset
Event
-
VCC1_R
ESET
-
-
DS00001719D-page 126
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