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CDB43L22
necting headphones to either output jack, the on-board resistive load should be disconnected by removing
the jumpers on each stake header(J3 and J9).
The CDB43L22 also has A/B speaker output banana jacks (2 per A or B channel) and 1/8“ jack outputs (1
per A or B channel). Stake headers J15 and J19 allow one to short the differential outputs of Channel A and
B together, in order to monitor MONO PWM output from the CS43L22. The red banana jacks designate the
positive speaker terminal connection and the black jacks designate the negative terminal connection.
1.10
1.11
6
Control Port Connectors
The graphical user interface for the CDB43L22 (Cirrus Logic Flex GUI) allows the user to configure the
CS43L22 registers and other component registers via the on-board I2C control bus. The GUI interfaces with
the CDB via the USB connection to a PC. Section 4 “Software Mode Control” on page 11 provides a de-
scription of the Graphical User Interface (GUI).
USB Connector
Connecting a USB port cable from a PC to the USB connector on the board and launching the Cirrus
FlexGUI software enables one to use the CDB43L22. Note: The USB port connection also provides DC
power to the board (except for VP). The minimum current required is approximately 300 mA. It may, there-
fore, be necessary to connect the CDB43L22 directly to the USB port on the PC as opposed to a hub or
keyboard port where current may be limited.
DS792DB1
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