MC68HC05L28 Datasheet, PDF (9/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

TABLE OF CONTENTS
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TITLE
Page
Number
1
INTRODUCTION
1.1 Features.................................................................................................................1-1
1.2 Mask options on the MC68HC05L28.....................................................................1-3
1.2.1 Option register (OPT).......................................................................................1-3
2
MODES OF OPERATION AND PIN DESCRIPTIONS
2.1 Modes of operation ................................................................................................2-1
2.1.1 MC68HC05L28 modes of operation ................................................................2-2
2.1.1.1
Single chip mode........................................................................................2-2
2.1.1.2
RAM bootloader mode ...............................................................................2-2
2.1.2 MC68HC705L28 modes of operation ..............................................................2-4
2.1.2.1
EPROM bootloader mode ..........................................................................2-4
2.1.2.2
RAM bootloader mode ...............................................................................2-4
2.2 Pin descriptions .....................................................................................................2-6
2.2.1 VDD and VSS ..................................................................................................2-6
2.2.2 IRQ0 ................................................................................................................2-6
2.2.3 IRQ1.................................................................................................................2-6
2.2.4 IRQ2.................................................................................................................2-6
2.2.5 OSC1, OSC2 ...................................................................................................2-7
2.2.5.1
Crystal ........................................................................................................2-8
2.2.5.2
External clock .............................................................................................2-8
2.2.6 RESET.............................................................................................................2-8
2.2.7 PA0 – PA7, PB0 – PB7.....................................................................................2-9
2.2.8 PD0 – PD5 .......................................................................................................2-9
2.2.9 BP0 – BP3, FP0 – FP17 ..................................................................................2-9
2.2.10 AD0 – AD1, VREFH/VREFL ............................................................................2-9
2.3 Low power modes..................................................................................................2-10
2.3.1 STOP ...............................................................................................................2-10
2.3.2 WAIT ................................................................................................................2-12
2.3.3 Data retention ..................................................................................................2-12
MC68HC05L28
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