Diamond Systems ELTON ELT-BB01, User Manual

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Elton User Manual Rev 1.04 www.diamondsystems.com Page 44
Serial Termination Debug UART and PCIe/104 Power: JP3
The JP3 block settings can be switched to operate in different modes.

Serial Port 3 and Serial Port 4 TX Termination

Serial Port 3 and Serial Port 4 RX Termination

PCIe/104 Card Power Modes
The UART (Universal Asynchronous Receiver-Transmitter) interface on the microcontroller communicates
with the serial ports to implement the debug console on the RS422/RS485 signaling standards.
The first four positions of the Jumper provide the termination points for serial ports 3 and 4 in the
RS422/RS485 mode.
The fifth position of the Jumper will enable or disable the power supply to the PCIe/104 card.
The sixth position of the Jumper will select the
debug
UART or UART1 via serial port 1 on J22 .
The following table specifies the pinouts, functions, and power modes for the JP3 block. The text in bold and
italics mark the default configuration on JP3 .
Position Function IN OUT
1 Serial Port3 TX Termination
Enabled Disabled
2 Serial Port4 TX Termination Enabled Disabled
3 Serial Port3 RX Termination
Enabled Disabled
4 Serial Port4 RX Termination
Enabled Disabled
5 PCIe/104 Card Power Disabled
Enabled
6
Debug Port via Serial Port1
Enabled
Disabled
The following figure illustrates the default Jumper settings on the JP3 Block.
Figure 12.3-1: Jumper JP3 Default Location Settings
Note : On-board numbers 1, 2, 3, 4, 5, and 6, indicate the location for the Jumper on pin numbers 1-2,
3-4, and 5-6, respectively.