STM32F358XC datasheet(87/134 Pages) STMICROELECTRONICS

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STM32F358xC

Electrical characteristics

118

Figure 20. I/O AC characteristics definition

6.3.14

NRST pin characteristics

The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up

resistor, RPU (see Table 52).

Unless otherwise specified, the parameters given in Table 55 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 24.

Table 55. NRST pin characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL(NRST)(1) NRST Input low level voltage

0.3VDD+

0.07(1)

VIH(NRST)(1) NRST Input high level voltage

0.445VDD+

0.398(1)

Vhys(NRST) NRST Schmitt trigger voltage hysteresis

200

RPU

Weak pull-up equivalent resistor(2)

VIN = VSS

VF(NRST)(1) NRST Input filtered pulse

100(1)

VNF(NRST)(1) NRST Input not filtered pulse

700(1)

1. Guaranteed by design, not tested in production.

2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to the series

resistance must be minimum

(~10% order)

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