ST92195B データシートの表示（PDF） - STMicroelectronics

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ST92195B

32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER

STMicroelectronics 

ST92195B - GENERAL DESCRIPTION

PIN DESCRIPTION (Cont’d)

AF Outputs or Bidirectional Lines:

– In the case of Outputs or I/Os, AF is selected

explicitly by software.

Example 1: ADC trigger digital input

AF: EXTRG, Port: P4.7, Port Style: Standard I/O.

Write the port configuration bits (for TTL level):

P4C2.7=1

P4C1.7=0

P4C0.7=1

Enable the ADC trigger by software as described

in the ADC chapter.

Example 2: PWM 0 output

AF: PWM0, Port: P4.0

Write the port configuration bits (for output push-

pull):

P4C2.0=0

P4C1.0=1

P4C0.0=1

Example 3: ADC analog input

AF: AIN1, Port : P2.1, Port style: does not apply to

analog inputs

Write the port configuration bits:

P2C2.1=1

P2C1.1=1

P2C0.1=1

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