APM32F103CBT6-R datasheet(43/78 Pages) GEEHY

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w w w. g e e h y. c o m

P a g e 42

Symbo

Parameter

Condition

Minimum

value

Typical

Maximum

value

Unit

VIL

Low-level input voltage

CMOS port

-0.5

0.3VDD

VIH

High-level input voltage

0.7VDD

VDD+0.5

Vhys

Standard I/O pin Schmitt trigger voltage

hysteresis (2)

150

5V FT I/O pin Schmitt trigger voltage

hysteresis (2)

5%VDD

Ilkg

Input leakage current (3)

VSS

≤ VIN ≤ VDD

Standard I/O port

±1

μA

VIN = 5V，

FT port,

TA=25℃,VDD=5V

RPU

Weak pull-up equivalent resistance (4)

VIN = VSS

kΩ

RPD

Weak pull-down equivalent resistance

(4)

VIN = VDD

kΩ

CIO

Capacitance of I/O pin

FT=5V tolerant. To withstand the voltage higher than VDD+0.3, the internal pull-up or pull-down

resistance must be turned off.

The hysteresis voltage of Schmitt trigger switch level is obtained from a comprehensive

evaluation and is not tested in production.

If there is reverse current flow-backwards at adjacent pins, the leakage current may be higher

than the maximum value.

The pull-up and pull-down resistor is designed as a real resistor connected in series with a

controllable PMOS/NMOS switch.

Output drive current test

GPIO (general-purpose input/output port) normally supports ±8mA current, up to ±20mA

current (VOL/VOH reduction standard). In application, the number of I/O that can drive the

current shall be restricted to ensure that the consumed current cannot exceed the absolute

maximum rated value:

 The total current outputted by all I/O, plus the maximum operating current of MCU, cannot

exceed the absolute maximum rated value IVDD.

 The total current absorbed by all I/O, plus the maximum operating current of MCU, cannot

exceed the absolute maximum rated value IVSS.

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