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4-16 Theory of Operation
♦ Extended Capabilities Port (ECP) compatible, including level 2 support
♦ Bidirectional under either software or hardware control
♦ Compatible with ISA, and EISA, architectures
♦ Ability to multiplex FDC signals on parallel port pins allows use of an external
Floppy Disk Drive (FDD)
♦
Includes protection circuit to prevent damage to the parallel port when a
connected printer is powered up or is operated at a higher voltage
♦ UARTs
♦ Software compatible with the PC16550A and PC16450
♦ MIDI baud rate support
♦ Infrared support on UART2 (IrDA 1.0 SIR, IrDA 1.1 MIR and FIR, and Sharp SIR)
♦
Address Decoder
♦ 6 bit or 10 bit decoding
♦ External Chip Select capability when 10 bit decoding
♦ Full relocation capability (no limitation)
♦ Enhanced Power Management
♦
Special configuration registers for power-down
♦ Enhanced programmable power-down FDC command
♦ Auto power-down and wake-up modes
♦ 2 special pins for power management
♦ Typical current consumption during power-down is less than 10 µA
♦ Reduced pin leakage current
♦ Voltage support
♦ 3.3/5V operation
♦ General Purpose Pins
♦ 1 pin, for 2 separate programmable chip select decoders, can be programmed
for game port control
♦ Plug and Play Compatible