Serial ports
62
User’s Manual
DLoG ITC 7
12.
Serial ports
By default the DLoG ITC 7 is equipped with 4 serial ports. COM1 and COM2 are
accessible from the outside. COM3 and COM4 are used internally for communication
with the environment controller and the touch controller.
12.1.
Resources
Resources for the serial ports are pre-defined in the system architecture and
automatically managed by the BIOS. The resources for COM1, COM2, COM3 and
COM4 can be defined via the BIOS.
The standard resources for serial ports are:
COM1
Address 0x3F8 - 0x3FF (hexadecimal), Interrupt IRQ4
COM2
Address 0x2F8 - 0x2FF (hexadecimal), Interrupt IRQ3
COM3
Address 0x3E8 - 0x3EF (hexadecimal), Interrupt IRQ10
COM4
Address 0x2E8 - 0x2EF (hexadecimal), Interrupt IRQ11
12.2.
COM1 options
The following section describes what needs to be observed when using the COM1 port to
supply power to external equipment.
The resources required for the COM1 controller module are automatically reserved by
the BIOS.
COM1 as a power supply
The COM1 port can optionally supply externally connected equipment with +5 V of
power. The voltages are protected by internal fuses which limit the total consumed
current to 1.1 A at 5 V (including keyboard and mouse).
