FS32K112BFT0M datasheet(31/85 Pages) NXP

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Table 18. External System Oscillator frequency specifications

Symbol

Description

Min.

Typ.

Max.

Unit

Notes

S32K14x

S32K11x

S32K14x

S32K11x

S32K14x

S32K11x

fosc_hi

Oscillator crystal or resonator

frequency

—

40 1

MHz

fec_extal

Input clock frequency (external clock

mode)

—

MHz

tdc_extal

Input clock duty cycle (external clock

mode)

tcst

Crystal Start-up Time

8 MHz low-gain mode (HGO=0)

—

1.5

—

8 MHz high-gain mode (HGO=1)

—

2.5

—

40 MHz low-gain mode (HGO=0)

—

40 MHz high-gain mode (HGO=1)

—

For an ideal clock of 40 MHz, if permitted by application requirements, an error of +/- 5% is supported with 50% duty cycle

Frequencies below 40 MHz can be used for degraded duty cycle upto 40-60%

Proper PC board layout procedures must be followed to achieve specifications.

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