IMX8ULPIEC datasheet(32/100 Pages) NXP

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4.2.1.2 32 kHz oscillator electrical specifications

4.2.1.2.1 32 kHz oscillator DC electrical specifications

Table 12. 32kHz oscillator DC electrical specifications

Symbol

Description

Min.

Typ.

Max.

Unit

Internal feedback resistor

—

100

—

MΩ

Cpara

Parasitical capacitance of EXTAL32 and XTAL32

—

1.5

2.0

Vpp1

Peak-to-peak amplitude of oscillation

—

0.6

—

1. When a crystal is being used with the 32 kHz oscillator, the EXTAL32 and XTAL32 pins should only be connected to

required oscillator components and must not be connected to any other devices.

4.2.1.2.2 32 kHz oscillator frequency specifications

Table 13. 32 kHz oscillator frequency specifications

Symbol

Description

Min.

Typ.

Max.

Unit

Notes

fosc_lo

Oscillator crystal

—

32.768

—

kHz

tstart

Crystal start-up time

—

500

—

vec_extal32 Externally provided input clock amplitude

700

—

VBAT

2, 3

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

2. This specification is for an externally supplied clock driven to EXTAL32 and does not apply to any other clock input. The

oscillator remains enabled and XTAL32 must be left unconnected.

3. The parameter specified is a peak-to-peak value and VIH and VIL specifications do not apply. The voltage of the applied

clock must be within the range of VSS to VBAT.

4.2.1.3 Free-running oscillator FRO-192M specifications

Table 14. FRO-192M specifications

Symbol

Characteristic

Min.

Typ.

Max.

Unit

ffro192m

FRO-192M frequency (nominal)

192

MHz

Δffro192m

Frequency deviation

• 1T trim (Open loop)

—

±1.5

tstartup

Start-up time

—

μs

jitcyc

Cycle to cycle jitter

—

105

—

Ifro192m

Current consumption

—

μA

Any divided versions of the FRO that are not being used anywhere should be turned off to save power.

NOTE

NXP Semiconductors

System specifications

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

Data Sheet: Technical Data

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