Super I/O Chip; Ns Pc87332Vf Feature Summary; Flexible Drive Controller (Fdc) - HP Vectra VE5 2 Technical Reference Manual

SUPER I/O CHIP

The basic input/output control functions are provided by the Super I/O chip, the NS306. This
chip is 100% compatible with ISA architecture and provides:
• an integrated flexible drive controller that supports 3.5-inch and 5.25-inch flexible disk
drives, and tape drives
• a multi-mode parallel port
• two serial ports
• keyboard controller
• RTC
• 256 bytes of CMOS memory.

NS PC87332VF FEATURE SUMMARY

Function
Flexible disk controller
UARTs
Bidirectional parallel port
Address decoder
Enhanced power
management

FLEXIBLE DRIVE CONTROLLER (FDC)

The FDC is software and register compatible with the 82077AA, and 100% IBM compatible. It
has an A and B drive-swapping capability and a non-burst DMA option.
Features
• Software compatible with the DP8473, the 765A, and the N82077
• 16-byte FIFO (default disabled)
• Burst and non-burst modes
• Perpendicular recording drive support
• New high-performance internal digital data separator (no external filter
components required)
• Low-power CMOS with enhanced power-down mode
• Automatic media-sense support
• Software compatible with the PC16550A and PC16450
• MIDI compatible
• Enhanced Parallel Port (EPP) compatible
• Extended Capabilities Port (ECP) compatible
• Bidirectional under either software or hardware control
• Ability to multiplex FDC signals on parallel port pins for external FDD
• Includes protection circuit against damage caused when printer is
switched on, or operated at higher voltages
Provides selection of all primary and secondary ISA addresses including
COM 1 - 4 and LPT 1 - 2
• Special configuration registers for power down
• Enhanced programmable power down FDC command
• Auto power down and wake up modes
• 3 special pins for power management
• Typical current consumption during power down is less than 10µA
• Reduced pin leakage current