VGAX49
Revision as of 17:57, 13 February 2020 by Blwikiadmin (talk | contribs) (→2:2:2 Resistor Simulation)
Contents
Features
- Digital VGA adapter
- 16-bit digital video
- 5:6:5 (R:G:B) mapping (maximum)
- 2:2:2 (R:G:B) mapping (option)
- Uses summing resistors
- DB-15F connector
- 49x49mm ODAS form factor
- Mounting holes
Connectors
J1 - Digital Connections
P1 - VGA connector
Simulation
2:2:2 Resistor Simulation
- 3.3V Drive out of FPGA
- 1V is drive level for VGA specification
- 8 mA max drive current
- VGA presents a 75 Ohm load
- Series resistors present a voltage divider between the resistors on the card and the VGA load
- 1V at 75 Ohms is 13.3 mA
5:6:5 Resistor Simulation
- 3.3V Drive out of FPGA
- 1V is drive level for VGA specification
- 8 mA max drive current
- VGA presents a 75 Ohm load
- Series resistors present a voltage divider between the resistors on the card and the VGA load
