STM32WLE4JC datasheet(112/146 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32WLE5/E4xx

112/146

DS13105 Rev 9

5.3.17

NRST pin characteristics

The NRST pin input driver uses the CMOS technology. It is connected to a permanent

pull-up resistor, RPU.

Unless otherwise specified, the parameters given in the table below are derived from tests

performed under the ambient temperature and supply voltage conditions summarized in

Table 25: General operating conditions.

0b01

Fmax

Maximum

frequency

C = 50 pF, 2.7 V ≤ VDD ≤ 3.6 V

MHz

C = 50 pF, 1.8 V ≤ VDD ≤ 2.7 V

C = 10 pF, 2.7 V ≤ VDD ≤ 3.6 V

C = 10 pF, 1.8 V ≤ VDD ≤ 2.7 V

Tr/Tf

Output rise and

fall time

C = 50 pF, 2.7 V ≤ VDD ≤ 3.6 V

C = 50 pF, 1.8 V ≤ VDD ≤ 2.7 V

C = 10 pF, 2.7 V ≤ VDD ≤ 3.6 V

4.5

C = 10 pF, 1.8 V ≤ VDD ≤ 2.7 V

0b10

Fmax

Maximum

frequency

C = 50 pF, 2.7 V ≤ VDD ≤ 3.6 V

MHz

C = 50 pF, 1.8 V ≤ VDD ≤ 2.7 V

C = 10 pF, 2.7 V ≤ VDD ≤ 3.6 V

100(4)

C = 10 pF, 1.8 V ≤ VDD ≤ 2.7 V

37.5

Tr/Tf

Output rise and

fall time

C = 50 pF, 2.7 V ≤ VDD ≤ 3.6 V

5.8

C = 50 pF, 1.8 V ≤ VDD ≤ 2.7 V

C = 10 pF, 2.7 V ≤ VDD ≤ 3.6 V

2.5

C = 10 pF, 1.8 V ≤ VDD ≤ 2.7 V

0b11

Fmax

Maximum

frequency

C = 30 pF, 2.7 V ≤ VDD ≤ 3.6 V

120(4)

MHz

C = 30 pF, 1.8 V ≤ VDD ≤ 2.7 V

C = 10 pF, 2.7 V ≤ VDD ≤ 3.6 V

180(4)

C = 10 pF, 1.8 V ≤ VDD ≤ 2.7 V

75(4)

Tr/Tf

Output rise and

fall time

C = 30 pF, 2.7 V ≤ VDD ≤ 3.6 V

3.3

C = 30 pF, 1.8 V ≤ VDD ≤ 2.7 V

C = 10 pF, 2.7 V ≤ VDD ≤ 3.6 V

1.7

C = 10 pF, 1.8 V ≤ VDD ≤ 2.7 V

3.3

1. The maximum frequency is defined with (Tr+ Tf) ≤ 2/3 T, and duty cycle comprised between 45 and 55 %.

2. The fall and rise time are defined, respectively, between 90 and 10 %, and between 10 and 90 % of the output waveform.

3. OSPEED0[1:0] in GPIOA_OSPEEDR, GPIOB_OSPEEDR and GPIOC_OSPEEDR. OSPEED3[1:0] in GPIOH_OSPEEDR

4. This value represents the I/O capability but the maximum system frequency is limited to 48 MHz.

Table 74. I/O AC characteristics(1)(2) (continued)

OSPEEDx[1:0](3)

Symbol

Parameter

Conditions

Min

Max

Unit

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