3

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P-0.2

07/10/12

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PI3HDMI511

Description of Operation

Squelch function:

Squelch control is using low frequency signal detection. When TMDS input clock frequency is less than 10MHz, it will show no

input signal. When input signal is not present, IC will enter power-down mode.

Rx-sense detector:

no valid HDMI Rx is connected.

is detected in the HDMI Receiver, the IC will enter to the power-down mode.

Block diagram:

/OE Truth Table

/OE

Operation

0

Normal Operation Mode

1

Power Down Mode

TMDS Input Equalization Setting

EQ_S0

Equalization

(dB)

0

9dB

1

15dB

Note

For CLK channel, the EQ value is fixed to

3dB.

OC_S0 Truth Table

TMDS Output Pre-emphasis Setting

OC_S0

(internal

pull-up)

Single-end

Vswing (mV)

Pre-emphasis

(dB)

0

500

0 (open drain)

1

500

2.5 (open drain)

Note

For clock channel, pre-emphesis value is fixed to 0 dB.

HPD_SINK

IN_CLK+/-

IN_Dx+/-

120K ohm

RX_SENSE

LDO

VDD

RX_CTRL

VDD

Control Logic

SDA_SINK

SCL_SINK

SCL_SRC

SDA_SRC

CEXT

/OE

RXSEN

HPD_SRC

OC_S0

EQ_S0

TX

OUT_CLK+/-

OUT_Dx+/-

Clock Detection

300K ohm

100K ohm

100K ohm

12-0185