STM32F373RBT7(2013) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F373RBT7
(Rev.:2013)

ARM Cortex-M4 32b MCU+FPU, up to 256KB Flash+32KB SRAM timers, 4 ADCs (12/16-bit), 3 DACs, 2 comp., 2.0-3.6 V operation

STMicroelectronics 

STM32F37xxx

Electrical characteristics

Figure 21. I/O AC characteristics definition

90%

50%

10%

10%

50%

90%

EXTERNAL tr(IO)out

OUTPUT

ON 50 pF

t f(IO)out

T

Maximum frequency is achieved if (t r + tf (≤ 2/3)T and if the duty cycle is (45-55%)

when loaded by 50 pF

MS32132V1

6.3.15 NRST characteristics

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)(1)

NRST Schmitt trigger voltage

hysteresis

-

200

-

mV

RPU

Weak pull-up equivalent resistor(2)

VF(NRST)(1) NRST Input filtered pulse

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

VIN = VSS

25

40

55

kΩ

-

-

100

ns

500

-

-

ns

1. Data based on design simulation only, 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 is minimal (~10% order).

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