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 PS/2 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 I/O pins
4 dedicated open-drain outputs
8-bit Timer/Counter
Binary and BCD arithmetic
Expandable I/O (Continued)
Pinout
SpecificationsSupply Voltage (VDD, VDDA) . . . . . . . . . .-0.5V to +7.0V
Supply Differential (lVDD±VDDAl) . . . . . . . . . . . . . .0.6V
Input Voltage (VI) . . . . . . . . . . . . .-0.5V to VDD + 0.5V
Output Voltage (VO) . . . . . . . . . .. .-0.5V to VDD + 0.5V
Storage Temperature (TSTG) . . . . . . . . -65 to +165
Power Dissipation (PD) . . . . . . . . . . . . . . . . . . . . . .1W
Lead Temperature (TL)
(Soldering, 10 seconds) . . . . . . . . . . . . . . . . . . ..260
Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur.
Note 2: Unless otherwise specified, all voltages are referenced to ground.
DescriptionThe PC87303VUL is a single chip solution incorporating a Keyboard 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 PC87303VUL 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 of PC87303VUL, and two user selectable chip selects are also implemented in PC87303VUL highly integrated member of the SuperI/O family. The advanced features and high integration of the PC87303 result in several benefits for low cost, high performance systems. Printed circuit board spacesavings, fewer components on the motherboard and compatibility with the latest industry standard peripherals of are only a few of the benefits of using a PC87303.
The KBC is fully software compatible with the 8042AH microcontroller. PC87303VUL 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 of PC87303VUL with support for binary and BCD arithmetic and extensive bit handling capabilities.
PC87303VUL Data Sheet
