STM32F302RBT7TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F302RBT7TR

ARM Cortex-M4F 32b MCU+FPU, up to 256KB Flash+48KB SRAM 4 ADCs, 2 DAC ch., 7 comp, 4 PGA, timers, 2.0-3.6 V operation

STMicroelectronics 

Electrical characteristics

STM32F302xx/STM32F303xx

Figure 23. I/O AC characteristics definition

90%

50%

10%

10%

50%

90%

EXT ERNAL

O UTP UT

ON 50pF

tr(I O)out

tr(I O)out

T

Maximum fr equency is achieved if (tr + tf) ≤ 2/3) T and if the duty cycle is (45-55%)

when loaded by 50pF

ai14131

6.3.15

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 22.

Table 55. NRST pin characteristics

Symbol

Parameter

Conditions

Min

Typ

Max Unit

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

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

-

-

0.3VDD+

0.07(1)

V

0.445VDD+

0.398(1)

-

-

Vhys(NRST) NRST Schmitt trigger voltage hysteresis

RPU

Weak pull-up equivalent resistor(2)

VF(NRST)(1) NRST Input filtered pulse

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

VIN = VSS

-

200

-

mV

25

40

55

kΩ

-

-

100

ns

500

-

-

ns

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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Doc ID 023353 Rev 5

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