Technical information

Technical Information • SCS-TRUMPET • CPU Expansion Side Card

Specified by the VESA DisplayPort connector standard is a dedicated power pin 20 (+3.3V 0.5A). Both

the SCS-TRUMPET (source side) and a DP monitor (sink side) must provide power via this pin. A VESA

specified standard DisplayPort cable however must not connect the pins 20 of both cable ends, in

order to avoid a back driving conflict. Unfortunately there are cable assemblies available with pin 20

passed through, with unpredictable results on the system behaviour, e.g. for CPU sleep states.

Therefore the SCS-TRUMPET is equipped with a power switch in order to protect the CPU and side

card assembly from back driving effects caused by non VESA style cables.

Sample VESA Compliant DisplayPort Cable Assemblies

2.0m Plug to Plug, w. Latches • EKF Part. #270.66.1.02.0

Manhattan 307116, 391931

Molex 68783-0007

TE (Tyco) 2040687-2, 2040638-2