F71872
7 Register Descriptions
7.1 Global Control Registers
The configuration register is used to control the behavior of the corresponding devices. To configure the
register, using the index port to select the index and then writing data port to alter the parameters. The default
index port and data port are 0x4E and 0x4F respectively. Pull down the SOUT1 pin to change the default value
to 0x2E/0x2F (Can be programmed by register!). To enable configuration, the entry key 0x87 must be written to
the index port. To disable configuration, write exit key 0xAA to the index port. Following is a example to enable
configuration and disable configuration by using debug.
-o 4e 87
-o 4e 87
-o 4e aa
( enable configuration )
( disable configuration )
7.1.1 Software Reset Register Index 02h
Bit
Name
R/W Default
Description
7-1 Reserved
SOFT_RST
-
-
Reserved
Write 1 to reset the register and device powered by VDD ( VCC ).
0
R/W
0
7.1.2 Logic Device Number Register Index 07h
Bit
Name
R/W Default
R/W
Description
7-0 LDN
00h 00h: Select FDC device configuration registers.
01h: Select UART 1 device configuration registers.
02h: Select UART 2 device configuration registers.
03h: Select Parallel Port device configuration registers.
04h: Select Hardware Monitor device configuration registers.
05h: Select KBC device configuration registers.
06h: Select GPIO device configuration registers.
07h: Select VID device configuration registers.
0ah: Select PME & ACPI device configuration registers.
27
July, 2007
V0.28P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
