NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 31

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

6. CONFIGURATION REGISTER ACCESS PROTOCOL
The W83627UHG uses Super I/O protocol to access configuration registers to set up different types of
configurations. The W83627UHG has totally fifteen Logical Devices (from Logical Device 0 to Logical Device F
with the exception of Logical Device 4 for backward compatibility) corresponding to fifteen individual functions:
FDC (Logical Device 0), Parallel Port (Logical Device 1), UARTA (Logical Device 2), UARTB (Logical Device 3),
Keyboard Controller (Logical Device 5), UARTC (Logical Device 6), GPIO3, 4 (Logical Device 7), WDTO# &
PLED and GPIO5, 6 (Logical Device 8), GPIO1, 2 and SUSLED (Logical Device 9), ACPI (Logical Device A),
Hardware Monitor (Logical Device B), PECI & SST (Logical Device C), UARTD (Logical Device D),
UARTE(Logical Device E), and UARTF (Logical Device F). 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.
#0
#0
#0
#0
Logical Device No.
Logical Device No.
Logical Device No.
Logical Device No.
Logical Device
Logical Device
Logical Device
Logical Device
Logical Device
Logical Device
Logical Device
Logical Device
#1
#1
#1
#1
Figure 6-1 Structure of the Configuration Register
Configuration
Configuration
Configuration
Configuration
#2
#2
#2
#2
Control
Control
Control
Control
#C
#F
#C
#F
-22-
Logical Device
Logical Device
Logical Device
Logical Device
W83627UHG/NCT6627UD
One Per
One Per
One Per
One Per
Publication Release Date: October 26, 2010
Revision 1.7