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S32K311NHT0MPAST bảng dữ liệu(PDF) 96 Page - NXP Semiconductors

tên linh kiện S32K311NHT0MPAST
Giải thích chi tiết về linh kiện  Supports S32K344, S32K324, S32K314, S32K312, S32K341 and S32K342. Data is preliminary for S32K311, S32K310, S32K328, S32K338, S32K348, S32K358 and S32K388
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nhà sản xuất  NXP [NXP Semiconductors]
Trang chủ  http://www.nxp.com
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S32K311NHT0MPAST bảng dữ liệu(HTML) 96 Page - NXP Semiconductors

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Crystal oscillator circuit provides stable oscillations when gmXOSC > 5 * gm_crit. The gm_crit is defined as:
gm_crit = 4 * (ESR + RS) * (2πF)2 * (C0 + CL)2
where:
• gmXOSC is the transconductance of the internal oscillator circuit
• ESR is the equivalent series resistance of the external crystal
• RS is the series resistance connected between XTAL pin and external crystal for current limitation
• F is the external crystal oscillation frequency
• C0 is the shunt capacitance of the external crystal
• CL is the external crystal total load capacitance. CL = Cs+ [C1*C2/(C1+C2)]
• Cs is stray or parasitic capacitance on the pin due to any PCB traces
• C1, C2 external load capacitances on EXTAL and XTAL pins
See manufacture datasheet for external crystal component values
Figure 38. Oscillation build-up equation
To improve the FXOSC jitter & duty cycle performance, the functionality of the pin next to the Oscillator (namely,
PTE14 in HDQFP172 and PTE3 in HDQFP100 package) must be limited to static GPIO operation.
NOTE
Figure 39. Block diagram
NXP Semiconductors
Clocking modules
S32K3xx Data Sheet, Rev. 7, 04/2023
Data Sheet: Technical Data
Preliminary Information
96 / 146



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