CDB44L11 Cirrus Logic Inc, CDB44L11 Datasheet - Page 7

• Manufacturer Part Number: CDB44L11
• Description: EVALUATION BOARD FOR CS44L11
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r

Specifications of CDB44L11

• Amplifier Type: Class D
• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 23mW x 2 @ 16 Ohm
• Voltage - Supply: 1.8 V ~ 2.4 V
• Operating Temperature: -10°C ~ 70°C
• Board Type: Fully Populated
• Utilized Ic / Part: CS44L11
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS44L11
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

4. CONTROL FUNCTIONS
4.1
The function of the Control Buttons (Tables 1 and 2) is as follows:
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4.2
The CDB44L11 has 5 LEDs (D20 - D24) to indicate volume, tone and mute settings and 1 fault
LED (D25). The LED readout will normally indicate the volume level per Table 1. When one of the
Treble Up/Down or Bass Up/Down buttons is pressed, the LEDs will show the Treble Boost or
Bass Boost setting as depicted in Table 2. When the button is released the LEDs will continue to
show the Treble/Bass Boost setting for a period of 2 seconds and will then return to indicating the
volume setting. In Table 1 and Table 2, a “1” indicates that the LED is lit up.
The MUTE button toggles operation between mute and un-mute. When the amplifier is muted the
LEDs flash at a 0.5 Hz rate.
D25 (LED near the CS8420 Receiver) indicates when there is a loss of input signal or any other
problem in the receiver.
DS640DB1
Volume Up - Adds 1 dB to current volume setting.
Volume Dn - Subtracts 1 dB from current volume setting.
Treble Up - Adds 1 dB to current treble setting.
Treble Dn - Subtracts 1 dB from current treble setting.
Bass Up - Adds 1 dB to current bass setting.
Bass Dn - Subtracts 1 dB from current bass setting.
Mute - Mutes audio and sets PWM to modulated 50% duty cycle.
Reset - Upon release of the RESET Button, the microcontroller loads the default settings from the
flash memory into RAM. The RST line is pulled HI and these default settings are written to the
CS44L11 and the CS8420.
Control Buttons
LED Status
CDB44L11
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