PC87306 Datasheet, PDF (1/110 Pages) National Semiconductor (TI) – PC87306 SuperI/OTM Enhanced Sidewinder Lite Floppy Disk Controller, Keyboard Controller, Real-Time Clock, Dual UARTs, Infrared Interface, IEEE 1284 Pa

PRELIMINARY
November 1995
PC87306 SuperI O^TM Enhanced Sidewinder Lite
Floppy Disk Controller Keyboard Controller
Real-Time Clock Dual UARTs Infrared Interface
IEEE 1284 Parallel Port and IDE Interface
General Description
The PC87306 is a single chip solution incorporating a Key-
board and PS 2 Mouse Controller (KBC) Real Time Clock
(RTC) and most commonly used I O peripherals in ISA
EISA and MicroChannel based computers In addition to
the KBC and RTC a Floppy Disk Controller (FDC) two full
featured UARTs an IEEE 1284 compatible parallel port and
all the necessary control logic for an IDE interface provides
support for most commonly used I O peripherals Standard
PC-AT address decoding for all the peripherals a set of
configuration registers and two user selectable chip selects
are also implemented in this highly integrated member of
the SuperI O family The advanced features and high inte-
gration of the PC87306 result in several benefits for low
cost high performance systems Printed circuit board space
savings fewer components on the motherboard and com-
patibility with the latest industry standard peripherals are
only a few of the benefits of using a PC87306
The KBC is fully software compatible with the 8042AH mi-
crocontroller It contains system timing control logic cus-
tom ROM program memory RAM data memory and 18 pro-
grammable I O lines necessary to implement dedicated
control functions It is an efficient controller which uses pre-
dominantly single byte instructions with support for binary and
BCD arithmetic and extensive bit handling capabilities
(Continued)
Features
Y _{Floppy Disk Controller}
Software compatible with the DP8477 the 765A and
the N82077
16-byte FIFO (disabled by default)
Burst and Non-Burst modes
Perpendicular recording drive support
High performance internal analog data separator
(no external filter components required)
Low power CMOS with power-down mode
Automatic media-sense support with full IBM TDR
(Tape Drive Register) implementation for PC-AT and
PS 2 floppy drive types
Y _{Keyboard Controller}
8042AH and PC87911 software compatible
8-bit Microcomputer with 2 kBytes custom ROM and
256 Bytes data RAM
Asynchronous access to two data registers and one
status register during normal operation
Dedicated open drain outputs for keyboard controller
application
Supports both interrupt and polling
10 programmable I O pins
4 dedicated open-drain bidirectional pins
8-bit Timer Counter
Binary and BCD arithmetic
(Continued)
Block Diagram
TRI-STATE is a registered trademark of National Semiconductor Corporation
SuperI OTM is a trademark of National Semiconductor Corporation
MicroChannel PC-AT and PS 2 are registered trademarks of International Business Machines Corporation
C1995 National Semiconductor Corporation TL C 12379
TL C 12379 – 1
RRD-B30M115 Printed in U S A