Interfaces and Connectors
EBX-18 Hardware Reference manual
34
Programmable LED
Utility I/O connector J4 includes an output signal for attaching a software controlled LED.
Connect the cathode of the LED to J4, pin 48; connect the anode to +5V. An on-board resistor
limits the current to 15 mA when the circuit is turned on. A programmable LED is provided on
the CBR-5009B paddleboard. See Figure 21 on page 49 for the location of the Programmable
LED on the CBR-5009B paddleboard.
For instructions on how to switch the PLED on and off, refer to the
EBX-18 Programmer’s
Reference Manual
(available on the
EBX-18 Product Support Web Page
).
External Speaker
A miniature 8
Ω speaker can be connected between J4, pin 50 (SPKO*) and J4, pin 49
(MKPWR). A speaker is provided on the CBR-5009B paddleboard. See Figure 21 on page 49
for the location of the speaker on the CBR-5009B paddleboard.
Push-Button Reset
Connector J4 includes an input for a push-button reset switch. Shorting J4, pin 37 to ground
causes the EBX-18 to reboot.
This connector uses IEC 61000-4-2-rated TVS components to help protect against ESD damage.
A reset button is provided on the CBR-5009B paddleboard. See Figure 21 on page 49 for the
location of the reset button on the CBR-5009B paddleboard.
Video Interface
An on-board video controller integrated into the Vortex86DX2 SoC provides high performance
video output for the EBX-18.
C
ONFIGURATION
The EBX-18 uses shared memory architecture. This allows the video controller to use variable
amounts of system DRAM — 8 MB, 16 MB (default), 32 MB, or 64 MB — for video RAM.
The amount of RAM used for video is set with a BIOS Setup program option.
The EBX-18 supports two types of video output: SVGA and LVDS flat panel display. A BIOS
Setup program sub-menu (Boot Display Device) selects which output is enabled through POST.
The operating system will then take over based on the Graphic Utility CRT or LCD selection. If
the Boot Display Device selected provides incorrect timing information for an attached LCD
panel and the Graphics Utility is set to LCD, you may not see video on the output.
Refer to Table 24 on page 37 for a list of BIOS settings for boot display devices and their
corresponding resolutions.