MiTAC 8355 service manual SuperI/O-PC87393, General Description, Outstanding Features

8355 N/B MAINTENANCE

1.2.13 SuperI/O-PC87393

General Description

National Semiconductor’s PC87393 of LPC SuperI/O devices is targeted for a wide range of portable applications. PC99 and ACPI compliant, the PC87393 features an X-Bus Extension for read and write operations over the X-Bus, a full IEEE 1284 Parallel Port with a Parallel Port Multiplexer (PPM) for external Floppy Disk Drive (FDD) support, a Musical Instrument Digital Interface (MIDI) port, and a

Game port. Like all National LPC SuperI/O devices, the PC87393 offers a single-chip solution to the most commonly used PC I/O peripherals.

The PC87393 also incorporates: a Floppy Disk Controller (FDC), two enhanced Serial Ports (UARTs), one with Fast Infrared (FIR, IrDA 1.1 compliant), General-Purpose Input/Output (GPIO) support for a total of 32 ports, Interrupt Serializer for Parallel IRQs and an enhanced WATCHDOGTM timer.

Outstanding Features

X-Bus Extension for read and write operations

LPC bus interface, based on Intel’s LPC Interface Specification Rev. 1.01, February 1999 (supports CLKRUN and LPCPD signals) and Intel FWH transactions

PC99 and ACPI compliant

Serial IRQ support (15 options)

Interrupt Serializer (four Parallel IRQs to Serial IRQ)

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