F85226 Datasheet, PDF (34/44 Pages) Feature Integration Technology Inc. – LPC to ISA Bridge

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Feature Integration Technology Inc.
F85226
A23~A16 for specify address decoder, if the corresponding bit of this register is set
to a 1, the corresponding address bits will ignored by the specify address decoder.
For example: If the decoding range is 0x3F8 ~ 0x3FF, you can set 0x03F8 to CR34,
35 and 07h to CR33.
8.40 ADDR4 Decoder Address Low Byte Register – Index 0x34
Power-on default [7:0] =0000_0000b
Bit
Name
R/W PWR
Description
7-0 ADDR4_DEC
This register contains the address for specify decoder.
CR34 Bit [7..0] are used to define low byte of specify address.
CR35 Bit [7..0] are used to define high byte of specify address.
R/W VDD3V ^{For example: Decoding address was set to be 0x3F5h when wrote F5h to CR34}
and 03h to CR35. (The address decoder will decode the match “IO” address that
define in CR34 and CR35 register, but when set CR1B bit7 to 1, The address
decoder will decode the match “memory” address[31:16] that define in CR34 and
CR35 registers).
8.41 ADDR4 Decoder Address High Byte Register – Index 0x35
Power-on default [7:0] =0000_0000b
Bit
Name
R/W PWR
Description
7-0 ADDR4_DEC
This register contains the address for specify decoder.
CR34 Bit [7..0] are used to define low byte of specify address.
CR35 Bit [7..0] are used to define high byte of specify address.
For example: Decoding address was set to be 0x3F5h when wrote F5h to CR34
R/W VDD3V
and 03h to CR35. (The address decoder will decode the match “IO” address that
define in CR34 and CR35 register, but when set CR1B bit7 to 1, The address
decoder will decode the match “memory” address[31:16] that define in CR34 and
CR35 registers).
8.42 KBC Decoder Mask Register – Index 0x36
Power-on default [7:0] =0000_0100b
Bit
Name
R/W PWR
Description
7-0 KBC _MASK
This register is used to mask address bits (A7~A0) for specify address decoder, if
the corresponding bit of this register is set to a 1, the corresponding address
R/W VDD3V _{bit(A7~A0) is ignored by the specify address decoder.}
For example: If the decoding range is 0x060 & 0x064, you can set 0x060 to CR37,
38 and 04h to CR36.
F85226
29
July, 2007
V0.25P