W83627DHG-PT Nuvoton Technology Corporation of America, W83627DHG-PT Datasheet - Page 37

• Manufacturer Part Number: W83627DHG-PT
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627DHG-PT

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

7. CONFIGURATION REGISTER ACCESS PROTOCOL
The W83627DHG-P uses Super I/O protocol to access configuration registers to set up different types
of configurations. The W83627DHG-P 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-P.
LOGICAL DEVICE
NUMBER
A
0
1
2
3
4
5
6
7
8
9
#0
#0
Logical Device No.
Logical Device No.
Figure 7-1 Structure of the Configuration Register
Logical Device
Logical Device
Logical Device
Logical Device
#1
#1
Configuration
Configuration
#2
#2
Control
Control
#C
#C
Serial Peripheral Interface
Keyboard Controller
WDTO# & PLED
GPIO 2, 3, 4, 5
W83627DHG-P/W83627DHG-PT
Parallel Port
FUNCTION
UART A
UART B
GPIO 6
ACPI
FDC
-27-
Logical Device
Logical Device
Reserved
One Per
One Per
Publication Release Date: July 09, 2009
I/O BASE ADDRESS
100h ~ FF8h
100h ~ FF8h
100h ~ FF8h
100h ~ FF8h
100h ~ FFFh
100h ~ FF8h
100h ~ FFFh
Reserved
Reserved
Reserved
Version 1.94