The F71858 is hardware KBC integratingthe ACPI, temperature sensing and fan control functionsspecific for the legacy free MB application. The KBC functions include one keyboard and one PS/2 mouse, and can be used with IBMÒ-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 HW_IRQ (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. Besides, the F71858 supports AMDSI and Intel PECI/SST interfaces 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.
- FEATURES
- PACKAGE
- ATTACHMENTS
- General Functions
- Comply with LPC Spec. 1.1
- Hardware Keyboard Controller support one PS/2 keyboard and one PS/2 mouse
- Hardware Gate A20 and Hardware Keyboard Reset
- Support DPM (Device Power Management), ACPI
- KBC
- LPC interface support serial interrupt channel 1, 12.
- Two 16bit Programmable Address fully decoder, default 0x60 and 0x64.
- Support two PS/2 interface, one for PS/2 mouse and the other for keyboard.
- Keyboard’s scan code support set1, set2.
- Programmable compatibility with the 8042.
- Support both interrupt and polling modes.
- Hardware Gate A20 and Hardware Keyboard Reset.
- ACPI Functions
- 1 reset input and 5 PCI reset output pins
- 2 programmable power LED
- S3Gate control
- Resume reset
- Power ok signal
- Hardware Monitor Functions
- 2 current type accurate (3℃) thermal inputs for CPU thermal diode/2N3906 transistors
- One internal local thermal sensor
- Pin HW_IRQ# (default limit 100°C for CPU temp.)
- Temperature sensing range from -40℃~127℃
- 4 fan speed monitoring inputs
- 3 fan speed auto-control (support 3 wire and 4 wire fans)
- Support PWM and DAC mode control
- Default PWM duty is 40% when system boot up promptly
- Provide Intel PECI/SST interface for temperature sensing
- Provide AMDSI interface for temperature sensing
- Support 3 channels voltage monitor ( VCC3V + VSB3V + VBAT)
- Voltage monitor resolution is 8mV per LSB
- Package
- 48-pin LQFP