MC68HC908LJ12CPB FREESCALE [Freescale Semiconductor, Inc], MC68HC908LJ12CPB Datasheet - Page 340

• Manufacturer Part Number: MC68HC908LJ12CPB
• Description: 8-bit microcontroller units
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

17.1 Contents
17.2 Introduction
MC68HC908LJ12
Freescale Semiconductor
Technical Data — MC68HC908LJ12
NOTE:
—
Rev. 2.1
17.2
17.3
17.3.1
17.3.2
17.4
17.4.1
17.4.2
17.4.3
17.5
17.5.1
17.5.2
17.6
17.6.1
17.6.2
Thirty-two (32) bidirectional input-output (I/O) pins form four 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
Port C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
Port D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
Port A Data Register (PTA) . . . . . . . . . . . . . . . . . . . . . . . . 344
Data Direction Register A (DDRA) . . . . . . . . . . . . . . . . . . . 345
Port B Data Register (PTB) . . . . . . . . . . . . . . . . . . . . . . . . 347
Data Direction Register B (DDRB) . . . . . . . . . . . . . . . . . . . 348
Port B LED Control Register (LEDB) . . . . . . . . . . . . . . . . . 350
Port C Data Register (PTC) . . . . . . . . . . . . . . . . . . . . . . . . 351
Data Direction Register C (DDRC). . . . . . . . . . . . . . . . . . . 352
Port D Data Register (PTD) . . . . . . . . . . . . . . . . . . . . . . . . 354
Data Direction Register D (DDRD). . . . . . . . . . . . . . . . . . . 355
Section 17. Input/Output (I/O) Ports
Input/Output (I/O) Ports
Technical Data
DD
341
or