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2 sdvo, Sdvo, Digital-logic ag – Compaq SmartCore Express SMA200 User Manual

Page 26

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DIGITAL-LOGIC AG

SMA200 Manual V1.0

26

5.4.2.

SDVO

Signal

BUS

Type

Description

On Module
Termination

Ext. Ter-
mination
Needed

Max.
Length
in mm

Ohm

Matched
Length
in mm

SDVO_CTRLCLK SDVO

DDC signal

PU 4.7k to
3.3V

55

SDVO_CTRLDAT SDVO

DDC signal

PU 4.7K to
3.3V

55

SDVO_CLK +/-

SDVO

Dif

Out

Needs a series 100nF
capacitor to connect to an
SDVO converter chip

-

-

100

100

0.5

SDVO_INIT +/-

SDVO

Dif

In

Needs a series 100nF
capacitor to connect to an
SDVO converter chip

-

-

100

100

0.5

SDVO_STALL +/- SDVO

Dif

In

Needs a series 100nF
capacitor to connect to an
SDVO converter chip

-

-

100

100

0.5

SDVO_TVCLKIN +/-

SDVO

Dif

In

Needs a series 100nF
capacitor to connect to an
SDVO converter chip

-

-

100

100

0.5

SDVO_Red +/-

SDVO

Dif

Out

Needs a series 100nF
capacitor to connect to an
SDVO converter chip

-

-

100

100

0.5

SDVO_Green +/- SDVO

Dif

Out

Needs a series 100nF
capacitor to connect to an
SDVO converter chip

-

-

100

100

0.5

SDVO_Blue +/-

SDVO

Dif

Out

Needs a series 100nF
capacitor to connect to an
SDVO converter chip

-

-

100

100

0.5


If the signals are not used:

All these SDVO signals may be left open.


Remarks:

For the DDC signals, a voltage translator to 3.3V or 5V is needed.

Pair to Pair spacing:

35mil = 0.9mm

Pair to Pair matching:

better than 25mm

BUS to BUS spacing:

20mil = 0.5mm

The AC coupling capacitors (100nF / 0402) must be placed near the device for the Tx signals only.
The maximum number of vias per signal is less than 4.


Supported devices:

SiliConImage SIL1362 / SIL1364 (DVI)
Chrontel CH7021 (SDTV / HDTV / CRT)


EMV/EMI filters:

Chokes are needed.