45
Table 4–6 COM5 and COM6 TTL connector pin-out (J12 connector)
J12 COM5/6
TTL connector
Pin # Signal
1
TX5
2
RX5
3
GND
4
TX6
5
RX6
6
GND
Table 4–7 COM5/6 switches, Switch 4
Switch 4 – COM5/6 termination
COM Port Interface
Switch 4 Settings
COM5
RS–422/RS–485
no termination
Position 1 Off
Position 2 Off
RS–422/RS–485
with termination
Position 1 On*
Position 2 On*
COM6
RS–422/RS–485
no termination
Position 3 Off
Position 4 Off
RS–422/RS–485
with termination
Position 3 On*
Position 4 On*
* Default. These switches terminate the network. If
the XE–900 SBC is not at an end of the network, set
these switches to Off .
Function and use of serial ports
COM1 as serial console device
You can use COM1 as a console device to communicate with another PC. For COM1
to be a serial console, the “V” video switch (Switch 2 position 3) must be set to Off.
You can also redirect the video output to a serial console on COM1 by hitting the
carriage return (Enter) on the host keyboard during boot. See the Console devices
chapter for more information.
Note
When interfacing the XE–900 SBC to your desktop PC, you must use a null modem
adapter.
COM2 through COM5 as RS
–232 I/O
COM1 is an 8-wire RS–232 interface. COM2 through COM4 are dedicated 4-wire
RS–232 interfaces. COM5 can also be configured through Setup as a 4-wire RS–232
interface. You can connect up to five RS–232 serial I/O devices.
COM5/6 as TTL interface
COM5 and COM6 can be used as a TTL interface. The configuration for COM5 and
Содержание XE-900
Страница 19: ...19 Figure 2 1 XE 900 SBC component diagram top ...
Страница 20: ...20 Figure 2 2 XE 900 SBC component diagram bottom ...
Страница 21: ...21 Figure 2 3 XE 900 SBC dimensions without Integrated Conductive Cooling System ...
Страница 38: ...38 ...
Страница 91: ...91 Figure 15 2 Dimensions for the Integrated Conductive Cooling System ...