F71858 Datasheet, PDF (6/66 Pages) Feature Integration Technology Inc. – Hardware KBC with ACPI, Temp. and Fan Control

F71858
1. General Description
The F71858 is hardware KBC integrating the ACPI, temperature sensing and fan control
functions specific for the legacy free MB application. The KBC functions include one keyboard and
one PS/2 mouse, and can be used with IBM^{-compatible} personal computers or PS/2-based
systems. The controller receives serial data from the keyboard or PS/2 mouse, checks the parity of
the data, and presents the data to the system as a byte of data in its output buffer. The controller will
assert an interrupt to the system when data are placed in its output buffer.
The F71858 provides the ACPI control signals as well such as S3 state, resume reset, PCI reset
outputs or power OK signals. The power LED is programmable and compliant with PC2001.
As to the environment sensing functions, F71858 provides 2 remote analog dual current temp.
sensing inputs and one internal local temperature sensing. One alert signal will be issued while the
temperature is over the programmable limit. 4 fan monitoring inputs and 3 fan controlling outputs
provide Fintek’s patented auto-fan controlling features. Others, the F71858 supports AMDSI and
Intel PECI/SST interfaces for temperature use. for next generation CPU temp. sensing technology.
F71858 is in LPC interface and powered by 3VCC, 3V standby, and battery. The package is in
48 pin LQFP Green Package.
2. Feature List
General Functions
¾ Comply with LPC Spec. 1.0
¾ Hardware Keyboard Controller support one PS/2 keyboard and one PS/2 mouse
¾ Fast Gate A20 and Hardware Keyboard Reset
¾ Support DPM (Device Power Management), ACPI
KBC
¾ LPC interface support serial interrupt channel 1, 12.
¾ Two 16bit Programmable Address fully decoder, default 0x60 and 0x64.
¾ Support two PS/2 interface, one for PS/2 mouse and the other for keyboard.
¾ Keyboard’s scan code support set1, set2.
¾ Programmable compatibility with the 8042.
¾ Support both interrupt and polling modes.
¾ Fast Gate A20 and Hardware Keyboard Reset.
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July, 2007
V.26P