PC87303VUL Datasheet | National Semiconductor

Description The PC87303VUL is a single chip solution incorporating a Keyboard and PS 2 Mouse Controller (KBC) Real Time Clock (RTC) and most monly used I O peripherals in ISA EISA and Micro Channel based puters In addition to the KBC and RTC a Floppy Disk Controller (FDC) two full featured UARTs an IEEE 1284 patible parallel port and all the necessary control logic for an IDE interface provides support for most monly 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 Super I O 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 ponents on the motherboard and patibility with the latest industry standard peripherals are only a few of the benefits of using a PC87303 The KBC is fully software patible with the 8042AH microcontroller It contains system timing control logic custom ROM program memory RAM data memory and 18 programmable I O lines necessary to implement dedicated control functions It is an efficient controller which uses predominantly single byte instructions with support for binary and BCD arithmetic and extensive bit handling capabilities (Continued) Features The Floppy Disk Controller Software patible 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 ponents 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 The Keyboard Controller 8042AH and PC87911 software patible 8-bit Microputer with 2 kbytes custom ROM and 256 bytes data RAM Asynchronous access to two data registers and one status register during normal...