12. JUMPER DESCRIPTION
This page describes the jumper block functionalities provided by the Athena IV baseboard.
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This page describes the jumper block functionalities provided by the Athena IV baseboard.
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The 2x6 2mm jumper JP1 is used to:
Select the protocol for the serial ports
Enable the pull-up or pull-down on the DIOs
The serial port protocol mode selection is as tabulated below:
By default, the serial ports' outputs are disabled to prevent any accidental damages to the port pair.
The protocol selection remains same for serial ports 1 & 2 and serial ports 3 &4 ie inserting a jumper on location 5 on JP1 configures the both serial ports 1 & 2 in RS-232 mode
The on-boards DIOs can be pulled up or down with the help of jumper JP1.The configurations are as tabulated below:
The 2x2 2mm jumper JP4 is used to set the scan direction & mapping for certain LVDS displays. The configurations are as tabulated below:
The 1x7 2.54mm jumper JP5 is used to configure the LVDS LCD panel voltages. The configurations are as tabulated below:
A part of 2x9 2mm jumper JP6 is used to configure the base address of the A/D circuit. The configurations are tabulated below:
A part of 2x9 2mm jumper JP6 is used to configure the IRQ for the serial COM ports & A/D IRQ. The configurations are as tabulated below:
The two 2x5 2mm jumpers JP7 & JP8 are used to enable the 121E termination for the serial ports in RS-422 & RS-485 protocol modes. To enable the 121E termination for RS-422 & RS-485 modes, appropriate jumpers are mounted. The jumpers are removed to disable the 121E termination for RS-232 mode. The configurations are as tabulated below:
In RS-232, make sure to remove all the jumpers as the serial ports might end up failing due to the 121E termination on the communication lines
The 2x3 2mm jumper JP9 is used to configure the SPI lines to the FPGA SPI flash & enable the board power in absence of CoM. The configurations are as tabulated below:
Jumper on JP9 location 4 should never be mounted in presence of CoM. Mounting like this may damage the CoM
The 1x3 2.54mm jumper is used to configure the system watchdog. The configurations are as tabulated below:
The 2x3 2mm jumper J13 is used to set the configuration for the DAQ unit. The configurations are as tabulated below:
The 2x5 2.54 header connector J25 for VGA is partly used to enable the system in headless mode.