PC87351 Datasheet | National Semiconductor

Description The PC87351, a member of National Semiconductor’s Super I/O family of integrated PC peripherals, is a 128-pin, PC98 and ACPI pliant Super I/O that offers a single-chip solution to the most monly used ISA peripherals. The PC87351 incorporates: a Floppy Disk Controller (FDC) which is available also on the Parallel Port pins as a multiplexed option (PPM), two enhanced Serial Ports, Infrared unication Port (HP-SIR, Sharp-IR, and Consumer Electronics-IR), a full IEEE 1284 Parallel Port, a Keyboard and Mouse Controller (KBC), System Wake-Up Control (SWC), General-Purpose Input/Output (GPIO) Ports with assert interrupt capability, and Fan Speed Control (FSC). Outstanding Features - - - Fan Speed Control for two fans 11 General-Purpose I/O Ports, bi-directional, with interrupt assertion capability System Wake-Up Control powered by VSB, generates power-up request in response to preprogrammed keyboard or mouse sequence, modem, telephone ring, and two general-purpose events without an external clock Serial or parallel IRQ support Programmable write protect for Floppy Disk Controller Power-fail recovery support - - - Block Diagram Parallel Port/ Floppy Drive Interface Serial Interface Serial Infrared Interface Interface Floppy Drive Interface ISA Interface SERIRQ Serial Port 1 Serial Port 2 with IR Floppy Disk Controller IEEE 1284 Parallel Port Host Interface VSB VBAT System Wake-Up Control Fan Speed Control General-Purpose I/O Keyboard and Mouse Controller Wake-Up PWUREQ Events FANOUT0 FANOUT1 I/O Ports Keyboard and Mouse Ports Interface IBM®, Micro Channel®, PC-AT® and PS/2® are registered trademarks of International Business Machines Corporation. Microsoft® and Windows® are registered trademarks of Microsoft Corporation. TRI-STATE® is a registered trademark of National Semiconductor Corporation. © 1998 National Semiconductor Corporation .national. Highlights (Continued) Features - Serial Port 2 with Infrared - - - - - - - Software...