描述 Description

The F81801 which is the featured IO chip for new generational PC system is equipped with two UARTports, KBC, Serial Peripheral Interface (SPI), and 80-Port. The F81801 integrated with hardware monitor, 2 sets of voltage sensor, 2 sets of creative auto-controlling fans and 2 temperature sensor pins for the accurate dual current type temp. measurement for CPU thermal diode or external transistors 2N3906.(1)The F81801 provides flexible features for multi-directional application. For instance, provides 16 GPIO pins (multi-pin), IRQ sharing function also designed in UART feature for particular usage and accurate current mode H/W monitor will be worth in measurement of temperature, provides 2 modes fan speed control mechanism included Manual Mode/Speed Mode/Temperature Mode for users’ selection.(1)?Additionally SPI interface is for BIOS usage including bridge function and back up function (Supports up to 16M and provides Mapping selection), and the 80-Port is for engineering and debuging usage. The F81801 supports newest AMD new interface TSI and Intel PECI 1.1/SST interfaces for temperature reading. Finally, the F81801 is powered by 3.3V voltage, with the LPC interface in the package of 64-TQFP green package.(1)(1)

特性 Features

General?Functions-????Comply with?LPC Spec. 1.1
-? ? Support ACPI
-????Provides two UARTs,
-????Support KBC ?
-????H/W monitor functions
-????SPI interface for BIOS Bridge and backup use.
-????Support Mapping selection for BIOS backup function
-????80-Port interface?from COM2
-????Support AMD?TSI?interface and Intel SST/PECI interface
-????PECI
-????16 GPIO Pins for flexible application????
-????24/48 MHz clock input
-????Packaged in 64-TQFP green package and powered by 3.3VCC
UART-????Two high-speed 16C550 compatible UART with 16-byte FIFOs
-????Fully programmable serial-interface characteristics
-????Baud rate up to 115.2K
-????Support IRQ sharing
Keyboard Controller-????Compatibility with the 8042
-????Support PS/2 mouse
-????Support both interrupt and polling modes
? ? ? ? ? ? -????Hardware Gate A20 and Hardware Keyboard Reset
Hardware Monitor Functions? ? ? ? ? ? -????2 dual current type (±3℃) thermal inputs for CPU thermal diode
? ? ? ? ? ? -? ??Temperature range -40℃~127℃
? ? ? ? ? ? -????2 sets voltage monitoring
? ? ? ? ? ? -????High limit signal (PME#) for Vcore level
? ? ? ? ? ? -????2 fan speed monitoring inputs
? ? ? ? ? ? -? ? 2 fan speed PWM/DC control outputs(support 3 wire and 4 wire fans)
? ? ? ? ? ? -????Issue PME# and OVT# hardware signals output
? ? ? ? ? ? -????Case intrusion detection circuit
? ? ? ? ? ? -? ? WATCHDOG# comparison of all monitored values
Serial Peripheral Interface Compatible? ? ? ? ? ? -????Support SPI bridge function for BIOS use
? ? ? ? ? ? -????Support Back Up BIOS function
? ? ? ? ? ? -????Up to 16M bit Support
? ? ? ? ? ? -????Mapping Selection function
80-Port Interface? ? ? ? ? ? -????Monitor 0x80 Port and output the value via signals defined for 7-segment display.
? ? ? ? ? ? -????High nibble and low nibble are outputted interleaved at 1KHz frequency.
? ? ? ? ? ? -? ? 80-Port output by COM2 interface.
Integrate AMD?TSI?interface
Integrate Intel PECI?1.1?/SST?interface
Package
? ? ? ? ? ? -????64-TQFP?green package
? ? ? Noted: Patented TW207103 TW207104 TW220442 US6788131 B1 TWI235231 TW237183 TWI263778
64-TQFP Green Package