STV0674-100TQFP STMICROELECTRONICS [STMicroelectronics], STV0674-100TQFP Datasheet - Page 32

• Manufacturer Part Number: STV0674-100TQFP
• Description: Tri-mode CMOS digital camera co-processor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Pinout and Pin Description
5.4
5.4.1
Note:
5.4.2
5.4.3
32/35
External circuits
Crystal oscillator
There are 2 crystal oscillator pins XTAL_IN, XTAL_OUT, as shown in
architecture is a single stage oscillator with an inverter working as an amplifier. The oscillator stage
is biased by an internal resistor (>1M ). 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%.
Audio
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.
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.
10nF
10K
XTALI
Figure 16: Oscillator support circuit
Figure 17: Audio PLL filter and CBS
VC
15pF
680 pF
Crystal
XTALO
15pF
+
-
Figure 16
CBS
10µF
. The oscillator cell
STV0674