mc68hc705k1 Freescale Semiconductor, Inc, mc68hc705k1 Datasheet - Page 63

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mc68hc705k1

Manufacturer Part Number
mc68hc705k1
Description
Hcmos Microcontroller Unit
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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7.1 Contents
7.2 Introduction
MC68HC705K1 — Rev. 2.0
Technical Data — MC68HC705K1
7.2
7.3
7.4
7.4.1
7.4.2
7.4.3
7.4.4
7.4.5
7.5
7.5.1
7.5.2
7.5.3
7.5.4
This section describes the two bidirectional input/output (I/O) ports:
Freescale Semiconductor, Inc.
For More Information On This Product,
Port A
Port B
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
I/O Port Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Port A Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Data Direction Register A. . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Pulldown Register A (PDRA) . . . . . . . . . . . . . . . . . . . . . . . . .3
Port A External Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Port A Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Port B Data Register (PORTB). . . . . . . . . . . . . . . . . . . . . . . .6
Data Direction Register B (DDRB) . . . . . . . . . . . . . . . . . . . . .8
Pulldown Register B (PDRB) . . . . . . . . . . . . . . . . . . . . . . . . .8
Port B Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Section 7. Parallel Input/Output (I/O)
Go to: www.freescale.com
Parallel Input/Output (I/O)
Technical Data

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