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MC68HC05P18A

HCMOS Microcontroller Unit

Freescale Semiconductor 

Freescale Semiconductor, Inc.

General Description

1.2 Introduction

The Motorola MC68HC05P18A is a low-cost microcontroller with:

• 4-channel, 8-bit analog-to-digital (A/D) converter

• 16-bit timer with output compare and input capture

• Serial communications port (SIOP)

• Computer operating properly (COP) watchdog timer

The HC05 central processor unit (CPU) core contains:

• 192 bytes of random-access memory (RAM)

• 8064 bytes of user read-only memory (ROM)

• 128 bytes of electrically erasable programmable read-only

memory (EEPROM)

• 21 input/output (I/O) pins (20 bidirectional, 1 input-only)

This device is available in:

• 28-pin plastic dual in-line package (PDIP)

• 28 pin small-outline integrated circuit package (SOIC)

A functional block diagram of the MC68HC05P18A is shown in

Figure 1-1.

Technical Data

General Description

For More Information On This Product,

Go to: www.freescale.com

MC68HC05P18A

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