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ST2100 датащи(PDF) 32 Page - STMicroelectronics

номер детали ST2100
подробное описание детали  Broadband powerline communication SoC optimized
PDF  39 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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ST2100 датащи(HTML) 32 Page - STMicroelectronics

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Clocking parameters
ST2100
32/39
DocID025777 Rev 1
6.2
Real-time clock (RTC)
The external circuit for generating the real-time clock from a crystal oscillator is shown in
Figure 5.
Figure 5. RTC crystal connection
1. CL1 and CL2 are the load capacitors.
The value of the capacitors depends on the type of the selected crystal. For example, using
a FOX Electronics®, P/N NC26LF-327 32.768 KHz oscillator, the value of the capacitors is
15 pF. The oscillator may not start if a crystal (FOX P/N FX325BS) is used.
If the shunt capacitance (Co) of the crystal is ~7.0 pF, then the maximum ESR of the crystal
must be less than 50
.
6.3
PCIe/SATA clock
For SATA operation, the PCIE_XTAL1/PCIE_XTAL2 clock inputs can be implemented by
a 30 MHz crystal oscillator as shown in Table 18.
For PCIe operation, a suitable clock driver such as IDT IDT_9FG104 can be used.
Table 18. EXPI clock characteristics
Symbol
Parameter
Min.
Typical
Max.
Unit
fOSC
PCIE_XTAL1/PCIE_XTAL2 clock input
frequency for SATA configuration
30
MHz
PCIE_XTAL1/PCIE_XTAL2 clock input
frequency for PCIe configuration
100



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