PI3HDMI336 Datasheet, PDF (12/22 Pages) Pericom Semiconductor Corporation – 3:1 ActiveEye HDMI Switch with I2C Control & ARC Transmitter

HPD[A:C] Output Diagram
PI3HDMI336
3:1 ActiveEye™ HDMI™ Switch with
I²C Control & ARC Transmitter
300K Ohm
Weak
Pull-down
No
HPD
Output
Buffer
From HPD_sink
or I²C byte0[2:0]
Note:
1. HPD output block support by SV_DD power.
2. During normal or standby mode, the HPD block is active. HPD signal output is programmed by the control register.
3. Open drain buffer is recommended with a 1Kohm pull-up resistor to 5V. If HPD output buffer is selected, external buffer transistor is required to avoid 5V to
3.3V leakage.
HPD[A:C] truth table:
B0b[4]=0, HPD_Sink input; B0b[3]=0, HPDx open drain output
Port selection
Port A
Port B
Port C
No port active
HPD input select
B0b[4]=0
HPD_Sink
HPD_Sink
HPD_Sink
HPD_Sink
HPD output select
B0b[3]=0
HPDA
Open drain
HPD_Sink
Open drain
L
Open drain
L
Open drain
L
HPDB
L
HPD_sink
L
L
HPDC
L
L
HPD_sink
L
B0b[4]=0, HPD_Sink input; B0b[3]=1, HPDx inverter output
Port selection
Port A
Port B
Port C
No port active
HPD input select
B0b[4]=0
HPD_Sink
HPD_Sink
HPD_Sink
HPD_Sink
HPD output select
B0b[3]=1
HPDA
Buffer
Buffer
Buffer
Open drain
/HPD_Sink
H
H
H
HPDB
H
/HPD_sink
H
H
HPDC
H
H
/HPD_sink
H
B0b[4]=1, I²C register input; B0b[3]=0, HPDx open drain output
Port selection
B0b[3]=0
Port [A:C]
No port active
HPD input select
B0b[4]=1
HPDA
B0b[2:0]
B0b[2:0]
HPD output select
B0b[3]=0
HPDB
Open drain
Open drain
HPDA
HPDC
B0b[0]
B0b[0]
HPDB
B0b[1]
B0b[1]
HPDC
B0b[2]
B0b[2]
12-0237
12
www.pericom.com 07/28/2012