PI3WVR31313A Datasheet, PDF (17/27 Pages) Pericom Semiconductor Corporation – DP/HDMI 1:3 De-multiplexer switches

PI3W VR31313A
DP/HDMI 1:3 De-multiplexer switches
HPD auto selection timing waveform
HPD from selected-active port
Selected port is active
HPD_SRC
t1 is the IRQ-HPD (sink) from selected-active port
t1 (<2ms)
Selected port is active
Selected port is active
Fig 4. HPD timing t1. HPD_SRC low and the active of selected port will follow t1, if t1 further extended
less than t2 (125ms)
Priority Setting
Event of priority setting change
HPD_SRC
Selected port is active
t1 (<2ms)
t3 (250ms)
All Channels Hi-Z
New selected port is active
Fig 5. HPD timing t3. All channels include DP-HDMI data, AUX, DDC, HPD and CAB_DET
Low for HPDs other than HPDx. HPDx is the HPD of the only port with plugging-in
HPDx
HPD_SRC
All Channels Hi-Z
t3 (250ms)
All Channels Hi-Z
HPDx port is active
Fig 6. HPD timing t3
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www.pericom.com 12/03/15