ST7PLITE39F2U6TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7PLITE39F2U6TR

8-bit MCU with single voltage Flash, data EEPROM, ADC, timers, SPI, LINSCI™

STMicroelectronics 

ST7LITE3xF2

13.8 I/O PORT PIN CHARACTERISTICS

13.8.1 General Characteristics

Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

VIL Input low level voltage

VSS - 0.3

0.3xVDD

VIH Input high level voltage

0.7xVDD

VDD + 0.3

Vhys

Schmitt trigger voltage

hysteresis 1)

400

IL

Input leakage current

VSS≤VIN≤VDD

±1

IS

Static current consumption in-

duced by each floating input pin 2)

Floating input mode

400

RPU

Weak pull-up equivalent resistor3)

VIN=

VSS

VDD=5V

VDD=3V

TA≤125°C 50

100

200

170

CIO

tf(IO)out

tr(IO)out

tw(IT)in

I/O pin capacitance

Output high to low level fall time 1) CL=50pF

Output low to high level rise time 1) Between 10% and 90%

External interrupt pulse time 4)

5

25

25

1

Unit

V

mV

µA

kΩ

pF

ns

tCPU

Notes:

1. Data based on characterization results, not tested in production.

2. Configuration not recommended, all unused pins must be kept at a fixed voltage: using the output mode of the I/O for

example or an external pull-up or pull-down resistor (see Figure 84). Static peak current value taken at a fixed VIN value,

based on design simulation and technology characteristics, not tested in production. This value depends on VDD and tem-

perature values.

3. The RPU pull-up equivalent resistor is based on a resistive transistor (corresponding IPU current characteristics de-

scribed in Figure 85).

4. To generate an external interrupt, a minimum pulse width has to be applied on an I/O port pin configured as an external

interrupt source.

Figure 84. Two typical Applications with unused I/O Pin

VDD

10kΩ

ST7XXX

UNUSED I/O PORT

10kΩ

UNUSED I/O PORT

ST7XXX

Caution: During normal operation the ICCCLK pin must be pulled- up, internally or externally (external pull-up of 10k mandatory in

noisy environment). This is to avoid entering ICC mode unexpectedly during a reset.

Note: I/O can be left unconnected if it is configured as output (0 or 1) by the software. This has the advantage of greater EMC

robustness and lower cost.

148/173

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