Component Descriptions
Model P5000HX Series CPU User’s Manual
71
Intel Advanced Inte-
grated Peripheral (AIP)
82091AA.
Control for the integrated serial ports, parallel port, floppy
drive and IDE hard drive interface is incorporated into a
single component, the Intel 82091AA. This component
provides:
•
Two 16550-compatible UARTs with 16-byte
FIFO and baud generation of up to 256K
•
Multi-mode bi-directional parallel port
•
Standard mode; IBM and Centronics
compatible
•
Enhanced Parallel Port (EPP)
•
High Speed mode; Enhanced Capabilities Port
(ECP) compatible with 16-byte FIFO
•
Industry-standard floppy controller with 16-
byte data FIFO (2.88 MB floppy support)
•
IDE hard disk decode and chip select (NOT
USED)
•
Supports DMA with type F transfers
•
Five programmable ISA interrupt lines
•
Serial ports can be configured via setup pro-
gram as either IRQ3 or IRQ4
Keyboard - PS/2
Mouse Interface
An Intel S82C42PC surface mount microcontroller con-
tains the Phoenix Technologies-compatible keyboard/
mouse controller code. An 8-pin header allows connection
with a cable adapter to an AT-style keyboard connector.
Also, a 10-pin (2x5) header allows connection with a cable
adapter to a PS/2 mouse connector.
Dallas DS12887 Real
Time Clock
The DS12887 is accurate to within 12 minutes/year at
25
°
C and requires no external support (the battery and
oscillator are integrated into the device). The component is
socketed and can be replaced if the internal battery loses
its charge (the internal battery has an estimated life time
of seven to ten years). The RTC can be set via the BIOS
Setup Utility.
