Compaq SmartCore Express SMA200 - Manual (Page 32)

DIGITAL-LOGIC AG SMA200 Manual V1.0
32
5.4.8. HDA Audio Interface
Signal BUS Type Description
On Module
Termination Ext. Ter-
mination
Needed Max.
Length
in mm
Ohm
Matched
Length
in mm
HDA_DOCKEN# CMOS 3.3V
Out
HAD dock enable.
This signal controls the
external HD audio
docking isolation logic.
When de-asserted, the
switch is in isolate
mode. - - 200 55 -
HAD_RST# CMOS 3.3V
Out
Reset signals for the
external codecs. Series 33 - 200 55 -
HAD_SYNC CMOS 3.3V
Out
Sample rate at 48kHz to
the codecs. Series 33 200 55 -
HAD_BITCLK CMOS 3.3V
Out
24MHz signal for the
external codec. Series 33 200 55 -
HAD_SDATAin [1..0] CMOS 3.3V
In
Data input from the
external codecs. - Series
33 Ohm 200 55 -
HAD_SDATAout CMOS 3.3V
Out
Data output from the
ext. PC. Series 33
HAD_DOCKRST# CMOS 3.3V Reset signal for the
codecs.
- - 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.