MC68HC912B32 Datasheet, PDF (3/128 Pages) Motorola, Inc – 16-Bit Microcontroller

TABLE OF CONTENTS
Section
Page
1
1.1
1.2
1.3
2
2.1
2.2
2.3
2.4
2.5
3
3.1
3.2
3.3
3.4
3.5
4
5
5.1
5.2
5.3
5.4
6
6.1
6.2
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
8
8.1
8.2
9
9.1
9.2
9.3
9.4
9.5
9.6
10
10.1
10.2
10.3
10.4
10.5
10.6
Introduction
1
Features ......................................................................................................................................1
Ordering Information ...................................................................................................................2
MC68HC912B32 Block Diagram .................................................................................................5
Central Processing Unit
6
Programming Model ....................................................................................................................6
Data Types ..................................................................................................................................7
Addressing Modes .......................................................................................................................7
Indexed Addressing Modes .........................................................................................................8
Opcodes and Operands ..............................................................................................................8
Pinout and Signal Descriptions
9
MC68HC912B32 Pin Assignments .............................................................................................9
Power Supply Pins ....................................................................................................................10
Signal Descriptions ....................................................................................................................11
Port Signals ...............................................................................................................................15
Port Pull-Up, Pull-Down and Reduced Drive .............................................................................19
Register Block
20
Operating Modes and Resource Mapping
25
Operating Modes .......................................................................................................................25
Background Debug Mode ..........................................................................................................26
Internal Resource Mapping .......................................................................................................28
Memory Maps ............................................................................................................................31
Bus Control and Input/Output
32
Detecting Access Type from External Signals ..........................................................................32
Registers ...................................................................................................................................32
Flash EEPROM
37
Overview ...................................................................................................................................37
Flash EEPROM Control Block ...................................................................................................37
Flash EEPROM Array ...............................................................................................................37
Flash EEPROM Registers .........................................................................................................37
Operation ...................................................................................................................................40
Programming the Flash EEPROM ............................................................................................42
Erasing the Flash EEPROM ......................................................................................................44
Program/Erase Protection Interlocks .........................................................................................46
Stop or Wait Mode .....................................................................................................................46
Test Mode .................................................................................................................................46
EEPROM
47
EEPROM Programmer’s Model ................................................................................................47
EEPROM Control Registers ......................................................................................................48
Resets and Interrupts
52
Exception Priority ......................................................................................................................52
Maskable Interrupts ...................................................................................................................52
Interrupt Control and Priority Registers .....................................................................................53
Resets .......................................................................................................................................54
Effects of Reset .........................................................................................................................54
Register Stacking ......................................................................................................................55
Clock Functions
57
Clock Sources ...........................................................................................................................57
Computer Operating Properly (COP) ........................................................................................57
Real-Time Interrupt ...................................................................................................................57
Clock Monitor ............................................................................................................................57
Clock Function Registers ..........................................................................................................58
Clock Divider Chains .................................................................................................................60
MC68HC912B32
MC68HC912B32TS/D
MOTOROLA
3