STV-674-100T-E01 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STV-674-100T-E01 Datasheet PDF : 35 Pages
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Pinout and Pin Description
5.4 External circuits
STV0674
5.4.1
Note:
Crystal oscillator
There are 2 crystal oscillator pins XTAL_IN, XTAL_OUT, as shown in Figure 16. The oscillator cell
architecture is a single stage oscillator with an inverter working as an amplifier. The oscillator stage
is biased by an internal resistor (>1MΩ). It also requires an external PI network consisting of a
crystal and two capacitors.
The clock accuracy of the oscillator circuit must be within the USB compliance data signaling rate
tolerance of 12.000Mb/s ± 0.25%.
Figure 16: Oscillator support circuit
XTALI
XTALO
Crystal
15pF
15pF
5.4.2 Audio
10K
10nF
Figure 17: Audio PLL filter and CBS
VC
CBS
680 pF
+
10µF
-
If the record audio section of the STV0674 is not required, AP, CBS, VC and AN can be left
unconnected. VDDA must however be connected to a 3V3 supply.
5.4.3
Recommended power supply decoupling
A 0.1µF bypass capacitor located as close as possible to the chip package connecting between all
VDD pins and GND and at least one bulk decoupling capacitor on each of the supply rails VDDA,
VDDC, VDDI and VDDP.
32/35
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