Compaq SMA200 user manual HDA Audio Interface, If the signals are not used Remarks

DIGITAL-LOGIC AG SMA200 Manual V1.0

5.4.8.HDA Audio Interface

Signal BUS

		On Module	Ext. Ter-	Max.		Matched
Type	Description	Termination	mination	Length	Ohm	Length
			Needed	in mm		in mm

HDA_DOCKEN# CMOS

HAD_RST#	CMOS
HAD_SYNC	CMOS
HAD_BITCLK	CMOS
HAD_SDATAin [1..0]	CMOS
HAD_SDATAout	CMOS
HAD_DOCKRST#	CMOS

3.3V	HAD dock enable.	-
Out	This signal controls the
	external HD audio
	docking isolation logic.
	When de-asserted, the
	switch is in isolate
	mode.
3.3V	Reset signals for the	Series 33
Out	external codecs.
3.3V	Sample rate at 48kHz to	Series 33
Out	the codecs.
3.3V	24MHz signal for the	Series 33
Out	external codec.
3.3V	Data input from the	-
In	external codecs.
3.3V	Data output from the	Series 33
Out	ext. PC.
3.3V	Reset signal for the	-
	codecs.

- 200 55

-	200	55
	200	55
	200	55
Series	200	55

33Ohm

-200 55

-

-

-

-

-

-

If the signals are not used:

Remarks:

The 33 Ohm series termination should be placed directly next to the codecs.

Supported Codecs:

EMV/EMI filters:

Are not needed.

32