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Audio
The audio interface on the EPM-5 is implemented using the Analog Devices AD1981B Audio
Codec. This interface is AC '97 2.3 compatible. Drivers are available for most Windows-based
operating systems. To obtain the most current versions, consult the EPM-5 product support page
at http://www.VersaLogic.com/private/pumasupport.asp.
J13 provides the line-level stereo input and line-level stereo output connection points. The
outputs will drive any standard-powered PC speaker set.
These connectors use IEC 61000-4-2-rated TVS components to help protect against ESD damage.
S
C
OFTWARE
ONFIGURATION
The audio interface uses PCI interrupt "INTB#". CMOS Setup is used to select the IRQ line
routed to INTB#.
The audio controller can be disabled within CMOS Setup.
CPU Temperature Monitor
A thermometer circuit constantly monitors the die temperature of the CPU. This circuit can be
used to detect over-temperature conditions, which can result from fan or heat sink failure or
excessive ambient temperatures, and under-temperature conditions.
The CMOS setup is used to set the temperature detection threshold. A status bit in the Special
Control Register bit D5 of I/O port 1D0h, can be read to determine if the die temperature is above
or below the threshold.
Contact the factory for information on clearing the status bit or reading and writing to the
thermometer circuit. See page 41 for additional information.
EPM-5 Reference Manual
Table 11: J13 Audio Connector
Signal
Name
Function
Pin
1
LINE_OUTR
Line-Out Right
2
Ground
Ground
3
LINE_OUTL
Line-Out Left
4
Ground
Ground
5
LINE_INR
Line-In Right
6
Ground
Ground
7
LINE_INL
Line-In Left
8
Ground
Ground
Interfaces and Connectors
37
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