MC68HC908JK3EMP MOTOROLA [Motorola, Inc], MC68HC908JK3EMP Datasheet - Page 153

• Manufacturer Part Number: MC68HC908JK3EMP
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

12.1 Contents
12.2 Introduction
MC68H(R)C908JL3E/JK3E/JK1E
MOTOROLA
Technical Data – MC68H(R)C908JL3E/JK3E/JK1E
NOTE:
12.2
12.3
12.3.1
12.3.2
12.3.3
12.4
12.4.1
12.4.2
12.5
12.5.1
12.5.2
12.5.3
Twenty three (23) 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
—
Rev. 2.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Port D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Port A Data Register (PTA) . . . . . . . . . . . . . . . . . . . . . . . . 156
Data Direction Register A (DDRA) . . . . . . . . . . . . . . . . . . . 157
Port A Input Pull-up Enable Register (PTAPUE) . . . . . . . . 158
Port B Data Register (PTB) . . . . . . . . . . . . . . . . . . . . . . . . 159
Data Direction Register B (DDRB) . . . . . . . . . . . . . . . . . . . 160
Port D Data Register (PTD) . . . . . . . . . . . . . . . . . . . . . . . . 162
Data Direction Register D (DDRD). . . . . . . . . . . . . . . . . . . 163
Port D Control Register (PDCR). . . . . . . . . . . . . . . . . . . . . 164
Section 12. Input/Output (I/O) Ports
Input/Output (I/O) Ports
Technical Data
DD
153
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