IEI Integration NANO-LX v1.00 - Manual (Page 83)

NANO-LX CPU Card
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3.4.3 COM3 RS422/RS485 Select Jumper
Jumper Label: JP3
Jumper Type: 3-pin header
Jumper Settings: See Table 3-38
Jumper Location: See Figure 3-33
The JP3 jumper sets the COM3 connector type to RS-422 or RS-485.
JP3 Description
1-2 UART-2 RxD Signal connect to RS-422 (Default)
2-3 UART-2 RxD Signal connect to RS-485
Table 3-38: JP3 Jumper Settings
3.4.4 AT/ATX Power Mode Select Jumper
Jumper Label: JP4
Jumper Type: 2-pin header
Jumper Settings: See Table 3-39
Jumper Location: See Figure 3-33
The JP4 jumper block controls the connection to a power supply.
The CN5 connector is used to connect a chassis power On/Off button using an adapter
cable and is configured through the JP4 jumper. The CN5 connector has two operational
modes:
1. Using ATX power: CN5 connects to an externally implemented power switch, and
the JP4 jumper should be left open.
2. Using AT power: The pins on JP4 are shorted by a jumper cap. JP4 should be
shorted by default as the AMD Southbridge is designed without the consideration
for a power button signal. The shorted JP4 provides a hardware feedback to