HC705MC4GRSSLASHD datasheet(67/180 Pages) NXP

номер детали	HC705MC4GRS/D

подробное описание детали	General Release Specification

PDF	180 Pages

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производитель	NXP [NXP Semiconductors]

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Input/Output Ports

Port C

General Release Specification

Input/Output Ports

7.6 Port C

Port C is an 8-bit bidirectional port that has shared pins with the

analog-to-digital (A/D) subsystem. The port C data register is located at

address $0002 and its data direction register (DDR) is located at

address $0006. Reset does not affect the data registers, but clears the

DDRs, thereby setting all of the port pins to input mode. Writing a 1 to a

DDR bit sets the corresponding port pin to output mode. (See Figure

7-4.)

The ADON bit in register ADSC is used to enable/disable the A/D

subsystem. Port C may be used for general I/O applications when the

A/D subsystem is disabled or when all A/D input channels are not

required. Unselected channels revert to general-purpose I/O. See

Section 8. Analog Subsystem.

Figure 7-4. Port C I/O Circuitry

READ $0002

WRITE $0002

READ $0006

DATA

I/O

OUTPUT

INTERNAL HC05

DATA BUS

RESET

(RST)

WRITE $0006

DATA DIRECTION

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC705MC4GRS/D датащи(PDF) 67 Page - NXP Semiconductors