IMX8ULPCEC datasheet(32/105 Pages) NXP

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4.2.1.1.1 Oscillator DC electrical specifications

Table 10. Oscillator DC electrical specifications

Symbol

Description

Min.

Typ.

Max.

Unit

Notes

VEXTAL EXTAL input voltage — external clock mode

—

VDD

VIH

Input high voltage — EXTAL pin in external

clock mode

0.7 x VDD

—

VDD

VIL

Input low voltage — EXTAL pin in external

clock mode

VSS

—

0.35 x VDD

IDD

Current consumption (high-gain mode)

—

Current consumption (low-power mode)

—

EXTAL load capacitance

—

XTAL load capacitance

—

Feedback resistor — low-power

mode (HGO=0)

—

MΩ

1 2

Feedback resistor — high-gain mode (HGO=1)

—

MΩ

Series resistor — low-power mode (HGO=0)

—

Series resistor — high-gain mode (HGO=1)

Vpp3

Peak-to-peak amplitude of oscillation

(oscillator mode) — high-frequency, low-power

mode (HGO=0)

—

0.8

—

Peak-to-peak amplitude of oscillation

(oscillator mode) — high-frequency, high-gain

mode (HGO=1)

0.75 x

VDD_PMC18

0.8 x

VDD_PMC18

—

1. See crystal or resonator manufacturer's recommendation

2. When low power mode is selected, RF is integrated and must not be attached externally.

3. The EXTAL and XTAL pins should only be connected to required oscillator components and must not be connected to any

other devices.

4.2.1.1.2 System oscillator frequency specifications

Table 11. System oscillator frequency specifications

Symbol

Description

Min.

Typ.

Max.

Unit

fosc_lo

Oscillator crystal or resonator frequency — low-

frequency mode

MHz

tdc_extal

Input clock duty cycle (external clock mode)

tstart

Start-up time (if 24MHz used only, high gainand low

power mode

—

0.2

—

NXP Semiconductors

System specifications

i.MX 8ULP Applications Processor—Commercial Products, Rev. 1, 09/2023

Data Sheet: Technical Data

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