MC80F0424 Datasheet, PDF(112/135 Page) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

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MC80F0424 Datasheet, PDF (112/135 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

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MC80F0424/0432/0448

Preliminary

no current flow after considering its relationship with external

circuit. In input mode, the pin impedance viewing from external

MCU is very high that the current doesnât flow.

But input voltage level should be VSS or VDD. Be careful that if

unspecified voltage, i.e. if uncertain voltage level (not VSS or

VDD) is applied to input pin, there can be little current (max. 1mA

at around 2V) flow.

If it is not appropriate to set as an input mode, then set to output

mode considering there is no current flow. The port setting to

High or Low is decided by considering its relationship with exter-

nal circuit. For example, if there is external pull-up resistor then

it is set to output mode, i.e. to High, and if there is external pull-

down register, it is set to low.

108

MAR. 2005 Ver 0.2

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