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CD00001237 Datasheet, PDF (82/105 Pages) STMicroelectronics – 8-bit MCUs with A/D converter
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ST6215C ST6225C
11.8 I/O PORT PIN CHARACTERISTICS
11.8.1 General Characteristics
Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ 1)
Max
Unit
VIL
Input low level voltage 2)
VIH Input high level voltage 2)
Vhys
Schmitt trigger voltage hysteresis 3) VDD=5V
VDD=3.3V
IL
Input leakage current
VSS≤VIN≤VDD
(no pull-up configured)
0.7xVDD
200
400
200
400
0.1
0.3xVDD
V
mV
1
μA
RPU
Weak pull-up equivalent resistor 4) VIN=VSS
VDD=5V
VDD=3.3V
40
80
110
230
350
700
kΩ
CIN I/O input pin capacitance
5
10
pF
COUT I/O output pin capacitance
5
10
pF
tf(IO)out Output high to low level fall time 5) CL=50pF
30
tr(IO)out Output low to high level rise time 5) Between 10% and 90%
35
ns
tw(IT)in External interrupt pulse time 6)
1
tCPU
Figure 61. Typical RPU vs. VDD with VIN = VSS
Rpu [Khom]
350
Ta=-40°C
300
Ta=25°C
250
Ta=95°C
Ta=125°C
200
150
100
50
3
4
5
6
VDD [V]
Notes:
1. Unless otherwise specified, typical data are based on TA=25°C and VDD=5V.
2. Data based on characterization results, not tested in production.
3. Hysteresis voltage between Schmitt trigger switching levels. Based on characterization results, not tested.
4. The RPU pull-up equivalent resistor is based on a resistive transistor. This data is based on characterization results,
not tested in production.
5. Data based on characterization results, not tested in production.
6. 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 62. Two typical Applications with unused I/O Pin
VDD
10kΩ
ST62XX
UNUSED I/O PORT
10kΩ
UNUSED I/O PORT
ST62XX
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