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