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PC87303 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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PC87303 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 114 page  TLC12074 PRELIMINARY February 1995 PC87303VUL SuperIO TM Sidewinder Lite Floppy Disk Controller Keyboard Controller Real-Time Clock Dual UARTs IEEE 1284 Parallel Port and IDE Interface General Description The PC87303VUL is a single chip solution incorporating a Keyboard and PS2 Mouse Controller (KBC) Real Time Clock (RTC) and most commonly used IO 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 pro- vides support for most commonly used IO 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 mem- ber of the SuperIO family The advanced features and high integration of the PC87303 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 PC87303 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 IO 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 The 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 PS2 floppy drive types Y The 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 Supports DMA handshake 18 programmable IO pins 4 dedicated open-drain outputs 8-bit TimerCounter Binary and BCD arithmetic Expandable IO (Continued) Block Diagram TLC12074 – 1 TRI-STATE is a registered trademark of National Semiconductor Corporation SuperIOTM is a trademark of National Semiconductor Corporation MicroChannel PC-AT and PS2 are registered trademarks of International Business Machines Corporation C1995 National Semiconductor Corporation RRD-B30M75Printed in U S A |
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