DMC73C168 Просмотр технического описания (PDF) - Daewoo Semiconductor

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производитель

DMC73C168

8Bit Single Chip Microcontroller

Daewoo Semiconductor 

8Bit Single Chip Microcontroller

35

DMC73C168

Read Data

Read

Direction Data

Strobe

AND

OR

AND

Direction Register

D

Q

D-Flip Flop

>

Q

Data

Strobe

Data Register

D

Q

D-Flip Flop

>

Q

Output

Buffer

Figure 5-1. Bidirectional I/O Logic

I/O Pin

Port A : Port A is an 8-bit bidirectional I/O port where any of its eight pins may be individually

programmed as an input or output under software control. Reading port A data register

(P32) returns either the current value at the pin (input mode) or the current value of

port A data register (output mode). And also port A can be used as A/D converter

AM and FM IF input.

Port B : Port B is an 8-bit bidirectional I/O port where any of its eight pins may be individually

programmed as an input or output under software control. Reading port A data register

(P34) returns either the current value at the pin (input mode) or the current value of

port B data register (output mode). And also port B can be used as Timer output ports.

Port C,D,F,G,H : Port C,D,F,G,H is an 8-bit bidirectional I/O port where any of its eight pins

may be individually programmed as an input or output under software control.

Reading port C,D,F,G,H data register (P36, P38, P42, P44, P46) returns either the

current value at the pin (input mode) or the current value of port C,D,F,G,H data

register (output mode).

Port E : Port E is an 8-bit bidirectional I/O port where any of its eight pins may be individually

programmed as an input or output under software control. Reading port E data register

(P40) returns either the current value at the pin (input mode) or the current value of

port E data register (output mode). And also port E can be used as SI/O data and

clock inputs or outputs and BEEP output port.

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