Advanced Super I/O For Servers

The Winbond 87427 is targeted for a wide range of servers, workstations and high-end desktops that use the Low Pin Count (LPC) bus for the host Interface and an SMBus Interface for either a Baseboard Management Controller (BMC) or mini-BMC (mBMC), both of which are optional.
For LPC and SMBus access, the 87427 features a fast X-Bus, over which boot Flash and I/O devices CAN be accessed. It supports X-Bus address line forcing (to 0 or 1) to create memory windows for BIOS data storage. When VSB exists, the BMC or mBMC CAN access the 87427 and its fast X-Bus via SMBus The SMBus also controls serial port float, RTC access, and serial port interconnection (snoop and take-over modes). In addition, the 87427 provides routing of up to two selected LPC I/O port transactions to the GPIO Extension Port.
The 87427 provides a VSB-powered high-frequency Clock for on-chip peripherals, and a configurable high-frequency Clock for other VSB-powered platform components.
The 87427 supports SensorPath health monitor Interface to National Semiconductor LMxx Sensors fan monitoring and control, and a chassis intrusion detector. The System Wake-Up Control (SWC) module supports flexible wake-up and power-off request mechanisms for all platforms (i.e., with or without BMC/mBMC).
The 87427 supports both I/O and memory mapping of module Registers and enables building legacy-free systems. It also incorporates a Floppy Disk Controller (FDC), two serial ports (UARTs), a Keyboard and Mouse Controller (KBC), General-Purpose Input/Output (GPIO), GPIO extension for additional off-chip GPIO ports, and an interrupt serializer for parallel IRQs.
By Winbond Electronics Corp America
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