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.
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.
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.
- 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
Noted: Patented TW207103 TW207104 TW220442 US6788131 B1 TWI235231 TW237183 TWI263778
