MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 147

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MC68HC908JK3

Manufacturer Part Number
MC68HC908JK3
Description
MC68HC908JK1
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet

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12.1 Contents
12.2 Introduction
MC68H(R)C908JL3
MOTOROLA
Technical Data — MC68H(R)C908JL3
NOTE:
Rev. 1.0
12.2
12.3
12.4
12.4.1
12.4.2
12.5
12.5.1
12.5.2
12.6
12.6.1
12.6.2
12.6.3
Twenty three bidirectional input-output (I/O) pins form three parallel
ports. All I/O pins are programmable as inputs or outputs.
Connect any unused I/O pins to an appropriate logic level, either V
V
operation, termination reduces excess current consumption and the
possibility of electrostatic damage.
SS
. Although the I/O ports do not require termination for proper
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Port A Data Register (PTA) . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Port D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Data Direction Register A (DDRA) . . . . . . . . . . . . . . . . . . . 150
Port A Input Pull-up Enable Register (PTAPUE) . . . . . . . . 151
Port B Data Register (PTB) . . . . . . . . . . . . . . . . . . . . . . . . 153
Data Direction Register B (DDRB) . . . . . . . . . . . . . . . . . . . 153
Port D Data Register (PTD) . . . . . . . . . . . . . . . . . . . . . . . . 155
Data Direction Register D (DDRD). . . . . . . . . . . . . . . . . . . 156
Port D Control Register (PDCR). . . . . . . . . . . . . . . . . . . . . 157
I/O Ports
Section 12. I/O Ports
Technical Data
DD
147
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