CD00001237 datasheet(82/105 Pages) STMICROELECTRONICS

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ST6215C ST6225C

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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.

Figure 61. Typical RPU vs. VDD with VIN = VSS

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

Symbol

Parameter

Conditions

Min

Typ 1)

Max

Unit

VIL

Input low level voltage 2)

0.3xVDD

VIH

Input high level voltage 2)

0.7xVDD

Vhys

Schmitt trigger voltage hysteresis 3)

VDD=5V

200

400

VDD=3.3V

200

400

Input leakage current

VSS≤VIN≤VDD

(no pull-up configured)

0.1

μA

RPU

Weak pull-up equivalent resistor 4)

VIN=VSS

VDD=5V

110

350

VDD=3.3V

230

700

CIN

I/O input pin capacitance

COUT

I/O output pin capacitance

tf(IO)out

Output high to low level fall time 5)

CL=50pF

Between 10% and 90%

tr(IO)out

Output low to high level rise time 5)

tw(IT)in

External interrupt pulse time 6)

1tCPU

VDD [V]

100

150

200

250

300

350

Rpu [Khom]

Ta=-40°C

Ta=25°C

Ta=95°C

Ta=125°C

10k

UNUSED I/O PORT

ST62XX

10k

UNUSED I/O PORT

ST62XX

VDD

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