CRD-42L51 Cirrus Logic Inc, CRD-42L51 Datasheet - Page 3

• Manufacturer Part Number: CRD-42L51
• Description: Audio Modules & Development Tools Ref Bd Low-volt Stereo CODEC
• Manufacturer: Cirrus Logic Inc

Specifications of CRD-42L51

• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS679RD1
1. QUICK-START GUIDE
3. Switch the power
switch to the ON po-
sition.
battery, installed on the
back side, is required.)
The Reset Function will
activate. No selections or
adjustments
made while Reset is on.
4. Push both SELECT buttons simulta-
neously to turn off the Reset function.
The board will enter Standby for a moment and
then automatically activate the Line function.
Pushbutton
7
ADJUST
SELECT
Control
(NOTE: 1 AAA
7. Speak into the microphone or activate the exter-
nal S/PDIF or Line player to begin evaluation.
3
can
(simultaneously)
(simultaneously)
Key Press
be
< AND >
- AND +
(only)
(only)
(only)
(only)
1. Begin by connecting 16 Ω
or 32 Ω headphones.
<
>
+
-
Left/Up Navigation - Shifts the focus between functions. A blinking LED indicates which func-
tion has received focus.
Right/Down Navigation - Shifts the focus between functions. A blinking LED indicates which
function has received focus.
Enables/Disables the function that is in-focus. When the selected function is enabled AND
in-focus, the associated LED blinks ON, periodically, with a longer duty cycle.
Decreases the volume level of the function that is in-focus.
Increases the threshold level of the ALC/Limiter when either is in-focus.
Increases the volume level of the function that is in-focus.
Decreases the threshold level of the ALC/Limiter when either is in-focus.
Enables/Disables confirmation/error beeps.
4
1
5
5. Use any one of the SELECT buttons to navigate
between and shift the focus to select functions.
To turn selected functions on or off, push both SELECT but-
tons simultaneously. The assocated LED will turn on or off.
Description
2
2. Connect the desired inter-
face.
Input. For smaller signals, enable the
ALC function for automatic level con-
trol (up to +12 dB analog gain). For dig-
ital source, connect optical cable to
S/PDIF Input
Apply up to 2 Vrms to the Line
6. Use any one of the AD-
JUST buttons to control
the volume/ threshold
level of each Source/Ef-
fects that receives focus.
The Level Meter will briefly
display a pre-defined gradient
that represents the volume/
threshold level in dBs. The op-
timal/default level flashes for a
few seconds.
6
CRD42L51
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