MEC1404 Datasheet, PDF (213/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
12.10.5 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_Address[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 32-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
12.10.6 MEMORY BASE ADDRESS 1 REGISTER
Type
R
R/W
R
Default
-
0h
Reset
Event
-
nSYSR
ST
-
-
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 mem-
ory location 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 Memory_Base_Address_1 + EC_Address.
1:0 Reserved
R
Default
0h
Reset
Event
nSYSR
ST
-
-
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DS00001956D-page 213