VS1033 Datasheet, PDF (16/70 Pages) List of Unclassifed Manufacturers – MP3/AAC/WMA/MIDI AUDIO CODEC

VLSI
Solution ^y
VS1033A
VS1033a PRELIMINARY
6. CONNECTION DIAGRAM, LQFP-48
6 Connection Diagram, LQFP-48
Figure 3: Typical Connection Diagram Using LQFP-48.
The ground buffer GBUF can be used for common voltage (1.24 V) for earphones. This will eliminate
the need for large isolation capacitors on line outputs, and thus the audio output pins from VS1033 may
be connected directly to the earphone connector.
Unused GPIO pins should have a pull-down resistor.
If GBUF is not used, LEFT and RIGHT must be provided with 100 µF capacitors.
If UART is not used, RX should be connected to IOVDD and TX be unconnected.
Do not connect any external load to XTALO.
Note: This connection assumes SM SDINEW is active (see Chapter 8.6.1). If also SM SDISHARE is
used, xDCS should be tied low or high (see Chapter 7.2.1).
Version 0.6, 2005-01-05
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