Product Descriptions

The PC87317VUL/PC97317VUL are functionally identical parts that offer a single-chip solution to the most commonly used ISA, EISA and MicroChannel® peripherals. This fully Plug and Play (PnP) compatible chip conforms to the Plug and Play ISA Specification Version 1.0a, May 5, 1994, and meets specifications defined in the PC97 Hardware Design Guide. It features a Controller/Extender that is fully compliant with Advanced Configuration and Power Interface (ACPI) Revision 1.0 requirements.

Note: All references to the PC87317VUL in this document also refer to the PC97317VUL, unless otherwise specified. References which are applicable to the PC97317VUL only are italicized.

The PC87317VUL incorporates: an advanced Real-Time Clock (RTC) device that provides both RTC timekeeping and Advanced Power Control (APC) functionality, a Floppy Disk Controller (FDC), a Keyboard and Mouse Controller (KBC), two enhanced Serial Ports (UARTs) with Infrared (IR) support, a full IEEE 1284 Parallel Port, 24 General-Purpose Input/Output (GPIO) bit ports, three general-purpose chip select signals that can be programmed for game port control and a separate configuration register set for each module.

The PC87317VUL provides a LED drive output to comply with PC97 specifications. The chip also provides support for Power Management (PM), including a WATCHDOG timer, and standard PC-AT address decoding for on-chip functions.

The PC87317VUL Infrared (IR) interface complies with the HP-SIR and SHARP-IR standards, and supports all four basic protocols for Consumer Remote Control circuitry (RC-5, RC-5 extended, RECS80 and NEC).

Product Features

Among the most advanced members of National Semiconductor’s highly successful SuperI/O family, the PC87317VUL offers: 

● Full compatibility with ACPI Revision 1.0 requirements 

● Compliancy with PC97 Hardware Design Guide speci- fications, including PC97 LED support 

● Advanced RTC, including timekeeping and APC functionality 

● 24 GPIO bit ports 

● FDC, KBC, two enhanced UARTs, IR support, IEEE 1284 parallel port

● 100 PERCENT compatibility with PnP requirements specified in the “Plug and Play ISA Specification”, ISA, EISA, and MicroChannel architectures 

● A special PnP module that includes: 

— Flexible IRQs, DMAs and base addresses that meet the PnP requirements specified by Microsoft® in their 1995 hardware design guide for Windows® and PnP ISA Revision 1.0A — PnP ISA mode (with isolation mechanism – Wait for Key state) 

— Motherboard PnP mode 

● An FDC that provides: 

— A modifiable address that is referenced by a 16-bit programmable register 

— Software compatibility with the PC8477, which contains a superset of the floppy disk controller functions in the µDP8473, the NEC µPD765A and the N82077 

— 13 IRQ channel options 

— Four 8-bit DMA channel options 

— 16-byte FIFO 

— Burst and non-burst modes 

— A new, high-performance, internal, digital data separator that does not require any external filter components 

— Support for standard 5.25" and 3.5" floppy disk drives 

— Automatic media sense support 

— Perpendicular recording drive support 

— Three-mode Floppy Disk Drive (FDD) support 

— Full support for the IBM Tape Drive Register (TDR) implementation of AT and PS/2 drive types 

● A KBC with: 

— A modifiable address that is referenced by a 16-bit programmable register, reported as a fixed address in resource data 

— 13 IRQ options for the Keyboard Controller 

— 13 IRQ options for the Mouse Controller 

— An 8-bit microcontroller 

— Software compatibility with 8042AH and PC87911 microcontrollers 

— 2 KB of custom-designed program ROM 

— 256 bytes of RAM for data 

— Five programmable dedicated open drain I/O lines for keyboard controller applications 

— Asynchronous access to two data registers and one status register during normal operation 

— Support for both interrupt and polling 

— 93 instructions 

— An 8-bit timer/counter 

— Support for binary and BCD arithmetic 

— Operation at 8 MHz,12 MHz or 16 MHz (programmable option)

— Customizing by using the PC87323VUL, which includes a RAM-based KBC, as a development platform for keyboard controller code for the PC87317VUL

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