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4-20 Theory of Operation
• Extended Capabilitie 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
• Infared support on UART2 (IrDA and Sharp-compliant)
• 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
• Mixed Voltage support
• Supports standard 5V operation
• Supports 3.3V operation
• Supports mixed internal 3.3V operation with 3.3V/5V external configuration
• General Purpose Pins:
• 2 pins the Bidirectional Parallel Port, for 2 separate programmable chip select
decoders, can be programmed for game port control
• Plug and Play Compatible:
• 16 bit addressing (full programmable)
• 10 selectable IRQs
• 3 selectable DMA Channels
• 3 SIRQ Inputs allow external devices to mapping IRQs
• 100-pin TQFP package - PC87336VJG