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3.8 External Battery Connector
The ROCKY-538TXV has a built-in 3V/850mAH industrial Li-battery for CMOS and
RTC backup. In normal operation, this factor board doesn’t need any external
battery to backup data. If you want to connect an external battery, you could
take off CN8 ’s pin on 1-2 jumper. Then connect the external battery to pin 1-4.
CN8 : External Battery Connector
PIN DESCRIPTION
1 External Battery +
2 NC
3 N/C
4 Ground
3.9 USB Port Connector
The ROCKY-538TXV has two built-in USB ports for the future I/O bus expansion.
CN14 : USB 0
CN15 : USB 1
PIN DESCRIPTION
1 VCC
2 DATA-
3 DATA+
4 GROUND
3.10 IrDA Infrared Interface Port
The ROCKY-538TXV has a built-in IrDA port which supports Serial Infrared (SIR)
or Amplitude Shift Keyed IR (ASKIR) interface. When in use, the IrDA port must
be set to SIR or ASKIR model through BIOS’s Peripheral Setup’s COM 2. Then the
normal RS-232 COM 2 will be disabled.
CN5 : IrDA connector
PIN DESCRIPTION
1 VCC
2 FIR-RX
3 IR-RX
4 Ground
5 IR-TX
6 CIR-RX
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