STM32F334X4 datasheet(50/115 Pages) STMICROELECTRONICS

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Electrical characteristics

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6.3.2

Operating conditions at power-up / power-down

The parameters given in Table 20 are derived from tests performed under the ambient

temperature condition summarized in Table 19.

6.3.3

Characteristics of the embedded reset and power-control block

The parameters given in Table 21 are derived from tests performed under ambient

temperature and VDD supply voltage conditions summarized in Table 19.

Table 20. Operating conditions at power-up / power-down

Symbol

Parameter

Conditions

Min.

Max.

Unit

tVDD

VDD rise time rate

∞

µs/V

VDD fall time rate

∞

tVDDA

VDDA rise time rate

∞

VDDA fall time rate

∞

Table 21. Embedded reset and power control block characteristics

Symbol

Parameter

Conditions

Min.

Typ. Max. Unit

VPOR/PDR(1)

1. The PDR detector monitors VDD and also VDDA (if kept enabled in the option bytes). The POR detector

monitors only VDD.

Power on/power down

reset threshold

Falling edge

1.8(2)

2. The product behavior is guaranteed by design down to the minimum VPOR/PDR value.

1.88

1.96

Rising edge

1.84

1.92

2.0

VPDRhyst(1) PDR hysteresis

tRSTTEMPO(3)

3. Guaranteed by design, not tested in production.

POR reset

temporization

1.5

2.5

4.5

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