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MC68HC05P18A

HCMOS Microcontroller Unit

Freescale Semiconductor 

Freescale Semiconductor, Inc.

General Description

Introduction

RESET

IRQ

PB5/SDO

PB6/SDI

PB7/SCK

COP

CPU CONTROL

ALU

68HC05 CPU

CPU REGISTERS

ACCUMULATOR

INDEX REGISTER

0 0 0 0 0 0 0 0 1 1 STK PNTR

PROGRAM COUNTER

CONDITION CODE

REGISTER

1

1

1

H

I

N

Z

C

SRAM — 192 BYTES

USER ROM — 8064 BYTES

PH2

÷2

OSC

÷4

16-BIT TIMER

1 INPUT CAPTURE

1 OUTPUT COMPARE

PORT D LOGIC

EEPROM — 128 BYTES

PORT B AND

SIOP

REGISTERS

AND LOGIC

Figure 1-1. MC68HC05P18A Block Diagram

OSC1

OSC2

PD7/TCAP

TCMP

PD5/CKOUT

PC7/VREFH

PC6/AD0

PC5/AD1

PC4/AD2

PC3/AD3

PC2

PC1

PC0

PA7

PA6

PA5

PA4

PA3

PA2

PA1

PA0

VDD

VSS

NOTE: A line over a signal name indicates an active low signal. For example,

RESET is active high and RESET is active low.

MC68HC05P18A

General Description

For More Information On This Product,

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Technical Data

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