Highlights (Continued)
Features
• PC98 and ACPI Compliant
— PnP Configuration Register structure
— Flexible resource allocation for all logical devices
t Relocatable base address
t 9 Parallel IRQ or 15 Serial IRQ routing options
t 3 optional 8-bit DMA channels (where applica-
ble)
• Floppy Disk Controller (FDC)
— Software compatible with the PC8477, which con-
tains a superset of the FDC functions in the
µDP8473, the NEC µPD765A and the N82077
— 16-byte FIFO
— Burst and non-burst modes
— High-performance, digital data separator that does
not require any external filter components
— Standard 5.25" and 3.5" Floppy Disk Drive (FDD)
support
— Perpendicular recording drive support
— Three-mode FDD support
— Full support for IBM Tape Drive Register (TDR) im-
plementation of AT and PS/2 drive types
— Programmable write protect
• Parallel Port
— Software or hardware control
— Enhanced Parallel Port (EPP) compatible with new
version EPP 1.9 and IEEE 1284 compliant
— EPP support for version EPP 1.7 of the Xircom spec-
ification
— EPP support as mode 4 of the Extended Capabilities
Port (ECP)
— IEEE 1284 compliant ECP, including level 2
— Selection of internal pull-up or pull-down resistor for
Paper End (PE) pin
— PCI bus utilization reduction by supporting a de-
mand DMA mode mechanism and a DMA fairness
mechanism
— Protection circuit that prevents damage to the paral-
lel port when a printer connected to it powers up or
is operated at high voltages, even if the device is in
power-down
— Output buffers that can sink and source 14 mA
• Parallel Port Multiplexer (PPM)
— Additional set of FDC signals multiplexed on Parallel
Port pins
— Optional connection of additional, external FDD on
Parallel Port connector
• Serial Port 1
— Software compatible with the 16550A and the 16450
— Shadow register support for write-only bit monitoring
— UART data rates up to 1.5 Mbaud
• Serial Port 2 with Infrared
— Software compatible with the 16550A and the 16450
— Shadow register support for write-only bit monitoring
— UART data rates up to 1.5 Mbaud
— HP-SIR
— ASK-IR option of SHARP-IR
— DASK-IR option of SHARP-IR
— Consumer Remote Control supports RC-5, RC-6,
NEC, RCA and RECS 80
— Non-standard DMA support − 1 or 2 channels
• Keyboard and Mouse Controller (KBC)
— 8-bit microcontroller
— Software compatible with the 8042AH and PC87911
microcontrollers
— 2 KB custom-designed program ROM
— 256 bytes RAM for data
— Four programmable dedicated open-drain I/O lines
— Asynchronous access to two data registers and one
status register during normal operation
— Support for both interrupt and polling
— 93 instructions
— 8-bit timer/counter
— Support for binary and BCD arithmetic
— Operation at 8 MHz,12 MHz or 16 MHz (programma-
ble option)
— Can be customized by using the PC87323, which in-
cludes a RAM-based KBC as a development plat-
form for KBC code
• 11 General-Purpose Bi-Directional I/O (GPIO) Ports
— 11 GPIO pins with interrupt assertion capability
— Programmable drive type for each output pin (open-
drain, push-pull or output disable)
— Programmable option for internal pull-up resistor on
each input pin
— Output lock option
— Back-drive protection circuit
• System Wake-Up Control (SWC)
— Power-up request upon detection of Keyboard,
Mouse, RI1, RI2, RING, PME1 and PME2 activity, as
follows:
t Preprogrammed Keyboard or Mouse sequence
t External modem ring on serial ports
t Ring pulse or pulse train on the RING input
t General purpose events, PME1 and PME2
— Optional routing of power-up request on IRQ line
— Powered by VSB
— Battery-backed wake-up setup
— Power-fail recovery support
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