IEI Integration NANO-LX v1.21 - Manual (Page 92)

NANO-LX EPIC SBC
Page 77
JP3 Description
1-2 UART-2 RxD Signal connect to RS-422 (Default)
2-3 UART-2 RxD Signal connect to RS-485
Table 5-4: JP3 Jumper Settings
5.6.4 AT/ATX Power Mode Select Jumper
Jumper Label: JP4
Jumper Type: 2-pin header
Jumper Settings: See Table 5-5
Jumper Location: See Figure 5-4
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:
Using ATX power: CN5 connects to an externally implemented power switch,
and the JP4 jumper should be left open.
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 initiate the system. The power on/off function is then managed by
the AT power switch button.
JP4 Description
Short AT Mode (Default)
Open ATX Mode
Table 5-5: JP4 Jumper Settings