yonfan
Newbie level 2
Hi,
I am designing a system whereby due to thermal constraints, I need to hold off the power to a ASIC Graphics processor whilst the rest of the system is powered.
I have a PCI interface (3V3) to the unpowered ASIC which appears to be driving a voltage of about 0.5V onto the 1V8 rail of the unpowered device. If I ground the PCI interface, the 1V8 rail drops to 0V. It is however impractical to ground the PCI interface in the real system prior to the ASIC being powered. My question is, should I worry about this or should I look at some way of isolating the unpowered device prior to power being applied?
Many thanks for your thoughts,
Jon
I am designing a system whereby due to thermal constraints, I need to hold off the power to a ASIC Graphics processor whilst the rest of the system is powered.
I have a PCI interface (3V3) to the unpowered ASIC which appears to be driving a voltage of about 0.5V onto the 1V8 rail of the unpowered device. If I ground the PCI interface, the 1V8 rail drops to 0V. It is however impractical to ground the PCI interface in the real system prior to the ASIC being powered. My question is, should I worry about this or should I look at some way of isolating the unpowered device prior to power being applied?
Many thanks for your thoughts,
Jon