F85226 Datasheet, PDF (22/44 Pages) Feature Integration Technology Inc. – LPC to ISA Bridge

Fintek
Feature Integration Technology Inc.
F85226
8.4 GPIO2 Function Select Register – Index 05h
Power-on default [7:0] =0000_sss0b
Bit
Name
R/W PWR
Description
7-5
Reserved
RO VDD3V
Set this bit to 0, the pin SA19/GP23 will be used as GP23 function or GPCS#. Set to 1,
3 GP23_MODE R/W VDD3V
the pin SA19/GP23 used as SA19. The default value is strapping by DACK5#.
Set this bit to 0, the pin SA18/GP22 will be used as GP22 function or GPCS#. Set to 1,
2 GP22_MODE R/W VDD3V
the pin SA18/GP22 use as SA18. The default value is strapping by DACK5#.
Set this bit to 0, the pin SA17/GP21 will be used as GP21 function or GPCS#. Set to 1,
1 GP21_MODE R/W VDD3V
the pin SA17/GP21 used as SA17. The default value is strapping by DACK5#.
Set this bit to 0, the pin GP20/PLED0 will be used as GP20 function or GPCS#. Set to
1, this pin will be used as PLED0 output.
0 GP20_MODE R/W VDD3V
(When use in LED mode, GP20 output control “CR18” must select to output mode,
and user need to take care that decoder select ”CR13,14” can’t select to pin GP20).
8.5 System Clock Register – Index 06h
Power-on default [7:0] =0000_0000b
Bit
Name
R/W PWR
Description
7
SYSCLK_SEL
6
EN_RECOVER8
5-3 RECOVER_TIME8
2
EN_RECOVER16
1-0 RECOVER_TIME16
R/W VDD3V ^{Set to 1, ISA system clock period will be 3 PCI clock. Set to 0, system clock}
period will be 4 PCI clock.
R/W VDD3V ^{Set to 1, enable bit [5:3] setting. Set to 0, disable bit [5:3] setting and uses 3.5}
SYSCLKs for 8 bits I/O recovery time.
When bit 6 was set to 1, these 3 bits field define the additional number of
SYSCLKs added to standard 3.5 SYSCLKs recovery time for 8 bits I/O.
= 000 --- 0 SYSCLK
= 001 --- 1 SYSCLK
R/W VDD3V ^{= 010 --- 2 SYSCLKs}
= 011 --- 3 SYSCLKs
= 100 --- 4 SYSCLKs
= 101 --- 5 SYSCLKs
= 110 --- 6 SYSCLKs
= 111 --- 7 SYSCLKs
Set to 1, enable bit [1:0] setting. Set to 0, disable bit [1:0] setting and uses 3.5
R/W VDD3V
SYSCLKs for 16 bits I/O recovery time.
.When bit 2 was set to 1, these 3 bits field define the additional number of
SYSCLKs added to standard 3.5 SYSCLKs recovery time for 16 bits I/O.
R/W VDD3V
= 01 --- 1 SYSCLK
= 10 --- 2 SYSCLK s
F85226
17
July, 2007
V0.25P