MM32F103CET datasheet(63/89 Pages) MINDMOTION

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DS_MM32F103xx_o_Ver1.13

Electrical characteristics

868304

The external output

load is 50 pF

Maximum frequency is achieved if ((tr + tf) ≤ 2/3)T,

(45 ~ 55%)

tr (IO)out

10%

50%

90%

10%

50%

90%

and if the duty cycle is

when loaded by C (see the i/O AC characteristics definition)

Figure 18. I/O AC characteristics

5.3.13 NRST pin characteristics

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

pullup resistor, RPU.

Unless otherwise stated, the parameters listed in the table below are measured using the

ambient temperature and VDD supply voltage in accordance with the condition Table 7.

Table 33. NRST pin characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL(NRST)

(

NRST input low level voltage

-0.5

0.8

VIH(NRST)

(

NRST input high level

voltage

VDD

Vhys(NRST)

NRST Schmitt trigger voltage

hysteresis

0.2VDD

RPU

Weak pull-up equivalent

resistor(2)

VIN = VSS

kΩ

VF(NRST)

(

NRST input filtered pulse

100

VNF(NRST)

(

NRST input not filtered pulse

300

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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