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PC87427 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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PC87427 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 46 page  © 2003 National Semiconductor Corporation www.national.com PRELIMINARY September 2003 Revision 1.0 PC87427 ServerI/O with SensorPathTM Health Monitoring General Description The National Semiconductor PC87427 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 Manage- ment Controller (BMC) or mini-BMC (mBMC), both of which are optional. For LPC and SMBus access, the PC87427 features a fast X-Bus, over which boot flash and I/O devices can be ac- cessed. The PC87427 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 PC87427 and its fast X-Bus via SMBus. The SMBus also controls serial port float, RTC access, and serial port inter- connection (snoop and take-over modes). In addition, the PC87427 provides routing of up to two selected LPC I/O port transactions to the GPIO Extension Port. The PC87427 provides a VSB-powered high-frequency clock for on-chip peripherals; it also provides a configurable high- frequency clock for other VSB-powered platform components. The PC87427 supports SensorPath health monitor inter- face to LMPCxx sensors, fan monitoring and control, and a chassis intrusion detector. The System Wake-Up Control (SWC) module supports flex- ible wake-up and power-off request mechanisms for all plat- forms (i.e., with or without BMC/mBMC). The PC87427 supports both I/O and memory mapping of module registers and enables building legacy-free systems. The PC87427 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. Outstanding Features s Legacy-reduced Advanced I/O, optimized for high-end platforms. Legacy modules: FDC, two Serial Ports (UARTs) and a Keyboard and Mouse Controller (KBC). s SensorPath system health support for LMXX sensors, fan monitor/control, and chassis intrusion detection, for all platforms (i.e., with or without a BMC or mBMC). s 8/16-bit fast X-Bus extension for boot flash, memory and I/O. s I/O-mapped and memory-mapped registers. s VSB-powered SMBus access to modules and fast X-Bus. s Two sets of BIOS code and data support, for main and back-up BIOS. s Extremely low current consumption in Battery Backup mode. s Serial Interface for manageability (Serial Interface M). Two-to-one multiplexing of Serial Ports 1 and 2. s 52 GPIO ports with a variety of wake-up events, plus GPIO extension for additional off-chip GPIO ports. s Watchdog for autonomous system recovery for BIOS Boot process and for operating system use. s 128-pin PQFP package. Block Diagram FDC Floppy Disk Interface LPC Bus Interface Serial IRQ LPC Interface VDD VBAT Keyboard & Mouse Controller PS/2 Interfaces KBC Ports ServerI/O Clock I/O GPIO SMI X-Bus Extension SCI & Ports VSB Interface SMBus Slave XIRQ Interface Power Control Wake-Up Events RTC 32.768 Clock Low-F Clock Internal Clocks X-Bus Clock Data Serial High-F Clock Generator Ports Port GPIO Extension Extension Intrusion Chassis Tach Fan PWM Fan KHz Fan Monitor and Control Serial Port 1 Interface M Serial Route Matrix Serial Interface 2 Serial System Wake-Up Control Watchdog WDO Serial Port 2 Interface 1 Health Monitor and Control SensorPath Interface National Semiconductor and TRI-STATE are registered trademarks of National Semiconductor Corporation. SensorPath is a trademark of National Semiconductor Corporation. All other brand or product names are trademarks or registered trademarks of their respective holders. |
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