STM32F303XD datasheet(123/173 Pages) STMICROELECTRONICS

Part #	STM32F303XD

Description	ARM Cortex-M4 32b MCUFPU, up to 512KB Flash, 80KB SRAM, FSMC, 4 ADCs, 2 DAC ch., 7 comp, 4 Op-Amp, 2.0-3.6 V

PDF	173 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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STM32F303xD STM32F303xE

Electrical characteristics

151

Figure 40. I/O AC characteristics definition

1. See Table 68: I/O AC characteristics.

6.3.16

NRST pin characteristics

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

resistor, RPU (see Table 66).

Unless otherwise specified, the parameters given in Table 69 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 19.

Table 69. 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

500(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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