mc68hc05p18a Freescale Semiconductor, Inc, mc68hc05p18a Datasheet - Page 55

• Manufacturer Part Number: mc68hc05p18a
• Description: Mc68hc05p18a Hcmos Microcontroller Unit
• Manufacturer: Freescale Semiconductor, Inc

Technical Data — MC68HC05P18A
7.1 Contents
7.2 Introduction
MC68HC05P18A
7.2
7.3
7.4
7.5
7.6
7.7
In user mode, 20 bidirectional input/output (I/O) lines are arranged as:
These ports are programmable as either inputs or outputs under
software control of the data direction registers (DDRs). There is also an
input-only pin associated with port D.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Two 8-bit I/O ports, port A and port C
One 3-bit I/O port, port B
One 1-bit I/O port, port D
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Port C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Port D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
I/O Port Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
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Input/Output (I/O) Ports
Section 7. Input/Output (I/O) Ports
Technical Data