Data Sheet

PRELIMINARY
VS1063a Datasheet
6 CONNECTION DIAGRAM, LQFP-48
The common buffer GBUF can be used for common voltage (1.23 V) for earphones. This will
eliminate the need for large isolation capacitors on line outputs, and thus the audio output pins
from VS1063a may be connected directly to the earphone connector.
GBUF must NOT be connected to ground under any circumstances. If GBUF is not used,
LEFT and RIGHT must be provided with coupling capacitors. To keep GBUF stable, you should
always have the resistor and capacitor even when GBUF is not used.
Unused GPIO pins should have a pull-down resistor. Unused line and microphone inputs should
not be connected.
If UART is not used, RX should be connected to IOVDD and TX be unconnected.
Do not connect any external load to XTALO.
Version: 0.42, 2011-11-24 16