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Audio
The audio interface on the Hawk is implemented using an Integrated Device Technology, Inc.
audio codec. This interface is Intel High Definition Audio (HDA) compatible. Drivers are
available for most Windows-based and Linux operating systems. To obtain the most current
versions, consult the Hawk Product Support Page.
The J12 main I/O connector provides the line-level stereo input and line-level stereo output
connection points. The outputs will drive most amplified PC speaker sets. Audio line-in and line-
out connectors are provided on the VL-CBR-5016 paddleboard. Figure 19 on page 37 shows the
locations of the audio line-in and line-out connectors.
Integrator's Note:
In Windows, the rear line-in audio input is configured by default as a microphone input.
To configure it for audio input, disable the microphone boost to eliminate audio distortion.
Push-button Reset
Connector J12 includes an input for a push-button reset switch. Shorting J12 pin 40 to ground
causes the Hawk to reboot. This must be a mechanical switch or an open-collector or open-drain
active switch with less than a 0.5V low-level input when the current is 1 mA. There must be no
pull-up resistor on this signal. This connector uses IEC 61000-4-2-rated TVS components to help
protect against ESD damage.
A reset button is provided on the VL-CBR-5016 paddleboard. Refer to Chapter 6, VL-CBR-5016
Paddleboard, beginning on page 37 for more information.
Power Button
Connector J12 includes an input for a power button. A momentary short to ground or assertion of
J12 pin 41 will cause a power button ACPI event. The button event can be configured in
Windows to enter an S3 power state (Sleep, Standby, or Suspend-to-RAM), an S4 power state
(Hibernate or Suspend-to-Disk), or an S5 power state (Shutdown or Soft-Off). A short or
assertion with a duration of more than 4 seconds will cause an abrupt hardware power down to
S5. This connector uses IEC 61000-4-2-rated TVS components to help protect against ESD
damage.
A power button is provided on the VL-CBR-5016 paddleboard. Refer to Chapter 6, VL-CBR-
5016 Paddleboard, beginning on page 37 for more information.
Supported Power States
The Hawk supports the following power states:
S0 (G0): Working.
S1 (G1-S1): All processor caches are flushed and the CPU stops executing instructions.
Power to the CPU and RAM is maintained. Devices that do not indicate they must
remain on may be powered down.
VL-EPU-3310 Reference Manual
Interfaces and Connectors
35
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