5
conditions. In addition, there are provisions for connecting an external, normally open, push button
reset switch. Refer to Appendix D for the reset switch connector location and pin assignments.
PRINTER PORT
The IRV-686 SBC contains a multimode parallel port which has the equivalence of an IBM PC/AT
Parallel Printer Port. The multimode parallel printer port supports the PS/2 type bi-directional
parallel port (SPP), the enhanced parallel port (EPP), and the extended capabilities port (ECP)
parallel port modes. The port can be configured as a standard IBM PC/AT compatible LPT1, LPT2,
or LPT3 printer port, or disabled completely using the CMOS Setup utility. Refer to Appendix D for
the connector location and pin assignments.
SERIAL PORTS
The IRV-686 SBC has the equivalence of two NC16C550 UARTs. The two UARTs can be configured
as standard IBM PC/AT RS-232C compatible COM1, COM2, COM3, or COM4 serial ports or
individually disabled using the CMOS Setup utility. The data rates are independently programmable
up to 115.2K baud. Refer to Appendix D for the connector location and pin assignments.
FLOPPY DISK PORT
The IRV-686 SBC contains an IBM PC/AT compatible dual floppy disk port with the equivalence of
an NEC PD72056B Floppy Disk Controller, an on-chip digital data separator, and an IBM PC/AT
compatible floppy disk adapter bus interface circuit. The Floppy Disk Port can be disabled by using
the CMOS Setup utility. An on-chip digital data separator provides optimum performance with the
following disk drive types:
5.25" 360K Double-Sided
3.5" 720K High Capacity
5.25" 1.2M High Capacity
3.5" 1.44M High Density
3.5" 2.88M High Density
Refer to Appendix D for the connector location and pin assignments.
IDE HARD DISK PORT
The IRV-686 SBC contains two PCI Extended Integrated Drive Electronics (EIDE) Ports which
directly interfaces to up to four hard disk drives with embedded controllers. The EIDE Disk Port can
be disabled using the CMOS Setup utility. Refer to Appendix D for the connector location and pin
assignments.
