MC68HC05P18 Datasheet, PDF (63/144 Pages) Freescale Semiconductor, Inc – Advance Information

Freescale Semiconductor, Inc.
Advance Information — MC68HC05P18/MC68HC805P18
Section 7. Input/Output (I/O) Ports
7.1 Contents
7.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
7.3 Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
7.4 Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
7.5 Port C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
7.6 Port D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
7.7 I/O Port Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
7.2 Introduction
In user mode, 20 bidirectional input/output (I/O) lines are arranged as
two 8-bit I/O ports (ports A and C), one 3-bit I/O port (port B), and one
1-bit I/O port (port D). These ports are programmable as either inputs or
outputs under software control of the data direction registers (DDRs). An
input-only pin is associated with port D.
MC68HC(8)05P18 — Rev. 2.0
MOTOROLA
Input/Output (I/O) Ports
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Advance Information
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