mc68hc705v12 Freescale Semiconductor, Inc, mc68hc705v12 Datasheet - Page 81

• Manufacturer Part Number: mc68hc705v12
• Description: M68hc05-based Mcu Hc05 Freescale Semiconductor
• Manufacturer: Freescale Semiconductor, Inc

7.1 Contents
7.2 Introduction
MC68HC705V12
Advance Information — MC68HC705V12
—
Rev. 3.0
7.2
7.3
7.3.1
7.3.2
7.4
7.4.1
7.4.2
7.5
7.5.1
7.5.2
7.5.3
7.6
In single-chip mode, 23 bidirectional input/output (I/O) lines are arranged
as two 8-bit I/O ports (ports B and C), and one 7-bit I/O port (port A).
There is one 5-bit input port (port D). The individual bits in the I/O ports
are programmable as either inputs or outputs under software control by
the data direction registers (DDRs). The port C pins also have the
additional property of acting as IRQ interrupt input sources.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Port C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Port D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Port A Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Port A Data Direction Register . . . . . . . . . . . . . . . . . . . . . .82
Port B Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Port B Data Direction Register . . . . . . . . . . . . . . . . . . . . . .84
Port C Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Port C Data Direction Register . . . . . . . . . . . . . . . . . . . . . .85
Port C I/O Pin Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Section 7. Parallel Input/Output (I/O)
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Parallel Input/Output (I/O)
Advance Information