Interfaces
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CM1-86DX3
3
Interfaces
This chapter provides descriptions and signal definitions only of the non-standard interfaces on
the board. Descriptions and signal definitions of standard interfaces such as PC/104 and SATA
can be found in their respective specification data sheets. If certain signals of standard inter-
faces have been modified or disconnected, those interfaces will be described in this chapter.
3.1
Serial Interfaces
Table 3-1 provides the signals for serial interfaces 1 & 2. Table 3-2 provides the signals for the
serial interfaces 3 & 4. Both interfaces use 10-pin, right-angle headers with 2 rows, odd/even
sequence (1, 2), and 0.100" (2.54mm) pitch.
The tables in this chapter define pin sequence using the method in
the following example: A 10-pin header with two rows of pins, using
odd/even numbering, where pin 2 is directly across from pin 1, is
noted as
10 pins, 2 rows, odd/even pin sequence (1, 2)
. Con-
secutive numbering is noted, for example, as
24 pins, 2 rows,
consecutive pin sequence (1, 13)
, where pin 13 is directly across
from pin 1. Refer to Figure 2-3 and Figure 2-4 for pin-1 locations.
Serial Ports 1 and 2 provide RS-485/422 functions as well as
RS-232 functionality. Only pins 1 and 3 provide RS-485/422/232
signals. Pins 5 and 7 provide only RS-422/232 signals.
To change the mode from RS-232 to RS-485 or RS-422, use the
settings in the Advanced>Serial Port menu of the BIOS Setup Util-
ity, described in Chapter 4.
In Table 3-1, pins 1, 3, 5, and 7 include secondary signals assigned
for RS-485/422 modes.
Serial Ports 3 and 4, described in Table 3-2, provide only RS-232
functions.
