IMX7DCEC datasheet(54/161 Pages) NXP

54 / 161 page

Electrical characteristics

i.MX 7Dual Family of Applications Processors Datasheet, Rev. 7, 09/2023

NXP Semiconductors

4.8.1

Reset timings parameters

Figure 10 shows the reset timing and Table 42 lists the timing parameters.

Figure 10. Reset timing diagram

4.8.2

WDOG Reset timing parameters

Figure 11 shows the WDOG reset timing and Table 43 lists the timing parameters.

Figure 11. WDOGx_B timing diagram

NOTE

RTC_XTALI is approximately 32 kHz. RTC_XTALI cycle is one period or

approximately 30 s.

NOTE

WDOGx_B output signals (for each one of the Watchdog modules) do not

have dedicated pins, but are muxed out through the IOMUX. See the

IOMUXC chapter of the i.MX 7Dual Application Processor Reference

Manual (IMX7DRM) for detailed information.

4.8.3

External interface module (EIM)

The following subsections provide information on the EIM.

Table 42. Reset timing parameters

Parameter

Min Max

Unit

CC1

Duration of POR_B to be qualified as valid.

Note: POR_B rise/fall times must be 5 ns or less.

—

RTC_XTALI cycle

Table 43. WDOGx_B timing parameters

Parameter

Min

Max

Unit

CC3

Duration of WDOG1_B Assertion

—

RTC_XTALI cycle

POR_B

CC1

(Input)

WDOGx_B

CC3

(Output)

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