STM32F412RG datasheet(122/193 Pages) STMICROELECTRONICS

部件名	STM32F412RG

功能描述	ARM-Cortex-M4 32b MCUFPU, 125 DMIPS, 1MB Flash, 256KB RAM, USB OTG FS, 17 TIMs, 1 ADC, 17 comm. interfaces

PDF	193 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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Electrical characteristics

STM32F412xE/G

122/193

DocID028087 Rev 4

Figure 36. I/O AC characteristics definition

6.3.17

NRST pin characteristics

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

resistor, RPU (see Table 56).

Unless otherwise specified, the parameters given in Table 59 are derived from tests

performed under the ambient temperature and VDD supply voltage conditions summarized

in Table 15. Refer to Table 56: I/O static characteristics for the values of VIH and VIL for

NRST pin.

Table 59. NRST pin characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

RPU

Weak pull-up equivalent

resistor(1)

VIN = VSS

VF(NRST)(2) NRST Input filtered pulse

100

VNF(NRST)(2) NRST Input not filtered pulse

VDD > 2.7 V

300

TNRST_OUT Generated reset pulse duration

Internal Reset

source

µs

1. 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)

2. Guaranteed by design, not tested in production.

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