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W83627DHG
Publication Release Date: Aug, 22, 2007
-24- Version
1.4
6. CONFIGURATION REGISTER ACCESS PROTOCOL
The W83627DHG uses Super I/O protocol to access configuration registers to set up different types of
configurations. The W83627DHG has totally twelve Logical Devices (from Logical Device 0 to Logical
Device C with the exception of Logical Device 4 for backward compatibility) corresponding to twelve
individual functions: FDC (Logical Device 0), Parallel Port (Logical Device 1), UARTA (Logical Device
2), UARTB (Logical Device 3), Keyboard Controller (Logical Device 5), SPI (Serial Peripheral Interface,
Logical Device 6), GPIO6 (Logical Device 7), WDTO# & PLED (Logical Device 8), GPIO2, 3, 4, 5
(Logical Device 9), ACPI (Logical Device A), Hardware Monitor (Logical Device B), and PECI & SST
(Logical Device C). Each Logical Device has its own configuration registers (above CR30). The host
can access those registers by writing an appropriate Logical Device Number into the Logical Device
select register at CR7. Please note that GPIO1 is not defined in the W83627DHG.
Devices of I/O Base Address
LOGICAL DEVICE
NUMBER
FUNCTION
I/O BASE ADDRESS
0 FDC
100h
~
FF8h
1
Parallel Port
100h ~ FF8h
2
UART A
100h ~ FF8h
3
UART B
100h ~ FF8h
4 Reserved
5
Keyboard Controller
100h ~ FFFh
6
Serial Peripheral Interface
100h ~ FF8h
7
GPIO 6
100h ~ FFFh
8
WDTO# & PLED
Reserved
9
GPIO 2, 3, 4, 5
Reserved
A ACPI
Reserved
B
Hardware Monitor
100h ~ FFEh
C
PECI & SST
Reserved
Logical Device No.
Logical Device
Control
Logical Device
Configuration
#0
One Per
Logical Device
#1
#2
#C
Logical Device No.
Logical Device
Control
Logical Device
Configuration
#0
One Per
Logical Device
#1
#2
#C
Summary of Contents for W83627DHG
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