User manual

ATHENA CPU User Manual V1.40 Page 18
4.13 VGA Connector – J25
GREEN 1 2 RED
BLUE 3 4 Ground
HSYNCH 5 6 DDC-Data
VSYNCH 7 8 DDC-Clock
Table 13: J25 – VGA Header Pinout
Signal Name Definition
RED RED signal (positive, 0.7Vpp into 75 Ohm load)
GREEN GREEN signal (positive, 0.7Vpp into 75 Ohm load)
BLUE BLUE signal (positive, 0.7Vpp into 75 Ohm load)
Ground Ground return
DDC-CLOCK/DATA Digital serial I/O signals used for monitor detection (DDC1 specification)
J25 provides a connection for VGA monitors. Note that while the DDC serial detection pins are
present, there is no 5V supply provided (nor are the old “Monitor ID” pins used). Diamond Cable
Assembly #698024 provides a female DB15 connection to interface with a standard RGB monitor.
Connector Part Numbers
J25 Connector on CPU board: Standard 2x5, 0.1” Box header
J25 Mating Cable Connector: Standard 2x5, 0.1” female ribbon cable connector