W83627DHG Datasheet, PDF (36/268 Pages) Winbond – WINBOND LPC I/O

W83627DHG
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.
Logical Device No.
Logical Device
Control
Logical Device
Configuration
#0
#1
#2
#C
One Per
Logical Device
Devices of I/O Base Address
LOGICAL DEVICE
NUMBER
0
1
2
3
4
5
6
7
8
9
A
B
C
FUNCTION
FDC
Parallel Port
UART A
UART B
Reserved
Keyboard Controller
Serial Peripheral Interface
GPIO 6
WDTO# & PLED
GPIO 2, 3, 4, 5
ACPI
Hardware Monitor
PECI & SST
I/O BASE ADDRESS
100h ~ FF8h
100h ~ FF8h
100h ~ FF8h
100h ~ FF8h
100h ~ FFFh
100h ~ FF8h
100h ~ FFFh
Reserved
Reserved
Reserved
100h ~ FFEh
Reserved
Publication Release Date: Aug, 22, 2007
-24-
Version 1.4