Specifications

Chapter 3 Hardware
ReadyBoard 800 Reference Manual 47
CRT Interface (J21)
Table 3-16. CRT Interface Pin/Signal Descriptions (J21)
Pin # Signal Description
1 RED Red – This is the Red analog output signal to the CRT.
2 GREEN Green – This is the Green analog output signal to the CRT.
3 BLUE Blue – This is the Blue analog output signal to the CRT.
4 NC Not connected
5 GND Ground
6 GND Ground
7 GND Ground
8 GND Ground
9 NC Not connected
10 GND Ground
11 NC Not connected
12 DDDA Display Data Channel Data – This signal line provides information to the CPU
through the Northbridge about the monitor type, brand, and model. This is part
of the Plug and Play standard developed by the VESA trade association.
13 HSYNC Horizontal Sync – This signal is used for the digital horizontal sync output to the
CRT.
14 VSYNC Vertical Sync – This signal is used for the digital vertical sync output to the CRT.
15 DDCLK Display Data Channel Clock – This signal line provides the data clock signal to
the CPU through the Northbridge from the monitor. This is part of the Plug and
Play standard developed by the VESA trade association.
Note: The shaded area denotes power or ground.