Analog Comparator - Freescale
Analog Comparator - Freescale
Analog Comparator - Freescale
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OSC2/<br />
XTAL<br />
OSC1/<br />
EXTAL<br />
MCU<br />
10MΩ<br />
330kΩ<br />
32.768kHz<br />
<strong>Freescale</strong> and the <strong>Freescale</strong> logo are trademarks of <strong>Freescale</strong> Semiconductor, Inc. All other product or service names are<br />
the property of their respective owners. © <strong>Freescale</strong> Semiconductor, Inc. 2007-2008. 37<br />
Load Capacitance – Pierce Example 1<br />
Y1 = 32.768kHz, CL = 12.5pF<br />
CL1<br />
CL2<br />
For best results pick CL1 ≤ CL2, within 1 or 2 std values<br />
Internal Parasitic Capacitance<br />
9pF 8pF 7pF 6pF<br />
CL1 CL2 CS CL CL CL CL<br />
10 15 1 12.11 11.60 11.10 10.59<br />
10 18 1 12.67 12.15 11.64 11.12<br />
12 15 1 12.70 12.20 11.70 11.20<br />
10 22 1 13.31 12.78 12.25 11.72<br />
12 18 1 13.32 12.81 12.30 11.80<br />
15 15 1 13.50 13.00 12.50 12.00<br />
10 27 1 13.98 13.44 12.89 12.33<br />
12 22 1 14.04 13.52 13.00 12.48<br />
15 18 1 14.21 13.71 13.20 12.70<br />
10 33 1 14.65 14.08 13.51 12.93<br />
12 27 1 14.80 14.26 13.73 13.19<br />
18 18 1 15.00 14.50 14.00 13.50<br />
TM
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