STM32L010R8 datasheet(71/92 Pages) STMICROELECTRONICS

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DS12325 Rev 3

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STM32L010K8 STM32L010R8

Electrical characteristics

Figure 21. I/O AC characteristics definition

6.3.14

NRST pin characteristics

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

resistor, RPU , except when it is internally driven low (see Table 51).

Unless otherwise specified, the parameters given in Table 51 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 15.

Fmax(IO)out Maximum frequency(4)

CL = 30 pF,

VDD = 2.7 V to 3.6 V

-35

MHz

CL = 50 pF,

VDD = 1.8 V to 2.7 V

-10

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 30 pF,

VDD = 2.7 V to 3.6 V

-6

CL = 50 pF,

VDD = 1.8 V to 2.7 V

-17

-tEXTIpw

Pulse width of external

signals detected by the

EXTI controller

-8

1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the line reference manual for a

description of GPIO Port configuration register.

2. BOOT0/PB9 maximum input frequency is 10 KHz (1.8 V < VDD < 2.7 V) and 5 MHz (2.7 V < VDD <3.6 V).

3. Guaranteed by design. Not tested in production.

4. The maximum frequency is defined in Figure 21.

Table 50. I/O AC characteristics(1)(2) (continued)

OSPEEDRx

[1:0] bit

value(1)

Symbol

Parameter

Conditions

Min Max(3) Unit

ai14131d

10%

90%

50%

tr(IO)out

OUTPUT

EXTERNAL

ON CL

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

when loaded by CL specified in the table “

I/O AC characteristics”.

10%

50%

90%

tf(IO)out

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