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HC705RC17GRS/D Datasheet(PDF) 55 Page - NXP Semiconductors

Part # HC705RC17GRS/D
Description  The MC68HC705RC17 is a general-purpose, low-cost addition to the M68HC05 Family of microcontroller units (MCUs) and is suitable for remote control applications.
PDF  126 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

HC705RC17GRS/D Datasheet(HTML) 55 Page - NXP Semiconductors

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MC68HC705RC17 — Rev. 2.0
General Release Specification
Parallel Input/Output (I/O)
General Release Specification — MC68HC705RC17
Section 7. Parallel Input/Output (I/O)
7.1 Contents
7.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
7.3
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
7.4
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
7.5
Port C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
7.6
Input/Output (I/O) Programming . . . . . . . . . . . . . . . . . . . . . . . .57
7.2 Introduction
In user mode, 18 lines are arranged as one 2-bit and two 8-bit I/O ports.
These ports are programmable as either inputs or outputs under
software control of the data direction registers.
NOTE:
To avoid a glitch on the output pins, write data to the I/O port data
register before writing a 1 to the corresponding data direction register.
Four extra I/O ports are available on higher pin count packages. Consult
factory for availability.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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