F71863 Datasheet, PDF (18/112 Pages) Feature Integration Technology Inc. – Super Hardware Monitor + LPC I/O

7. Function Description
F71863
7.1 Power on Strapping Option
The F71863 provides four pins for power on hardware strapping to select functions. There
is a form to describe how to set the functions you want.
Pin No.
Symbol
1
FWH_TRAP
2
PWM_DC
5
SPI_TRAP
121 FAN60_100
124 Config4E_2E
Value
1
0
1
0
1
0
1
0
1
0
Description
SPI as a backup BIOS (Default)
SPI as a primary BIOS
Fan control mode: PWM mode. ( Default)
Fan control mode: Linear mode.
SPI function disable (Default)
SPI function enable
Power on Fan speed default duty is 60%(PWM)(Default)
Power on Fan speed default duty is 100%(PWM)
Configuration Register I/O port is 4E/4F. (Default)
Configuration Register I/O port is 2E/2F.
7.2 FDC
The Floppy Disk Controller provides the interface between a host processor and one
floppy disk drives. It integrates a controller and a digital data separator with write
pre-compensation, data rate selection logic, microprocessor interface, and a set of registers.
The FDC supports data transfer rates of 250 Kbps, 300 Kbps, 500 Kbps, and 1 Mbps. It
operates in PC/AT mode and supports 3-mode type drives.
The FDC configuration is handled by software and a set of Configuration registers.
Status, Data, and Control registers facilitate the interface between the host microprocessor
and the disk drive, providing information about the condition and/or state of the FDC. These
configuration registers can select the data rate, enable interrupts, drives, and DMA modes,
and indicate errors in the data or operation of the FDC/FDD. The controller manages data
transfers using a set of data transfer and control commands. These commands are handled
in three phases: Command, Execution, and Result. Not all commands utilize all these three
phases.
The below content is about the FDC device register descriptions. All the registers are
for software porting reference.
18
July, 2008
V0.29P