MC68HC812A4 Datasheet, PDF (79/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Advance Information — MC68HC812A4
Section 5. Operating Modes and Resource Mapping
5.1 Contents
5.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
5.3 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
5.3.1 Normal Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . .81
5.3.1.1 Normal Expanded Wide Mode . . . . . . . . . . . . . . . . . . . . .81
5.3.1.2 Normal Expanded Narrow Mode . . . . . . . . . . . . . . . . . . .81
5.3.1.3 Normal Single-Chip Mode . . . . . . . . . . . . . . . . . . . . . . . .81
5.3.2 Special Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . .82
5.3.2.1 Special Expanded Wide Mode . . . . . . . . . . . . . . . . . . . . .82
5.3.2.2 Special Expanded Narrow Mode . . . . . . . . . . . . . . . . . . .82
5.3.2.3 Special Single-Chip Mode . . . . . . . . . . . . . . . . . . . . . . . .82
5.3.2.4 Special Peripheral Mode . . . . . . . . . . . . . . . . . . . . . . . . .82
5.3.3 Background Debug Mode. . . . . . . . . . . . . . . . . . . . . . . . . . .83
5.4 Internal Resource Mapping. . . . . . . . . . . . . . . . . . . . . . . . . . . .83
5.5 Mode and Resource Mapping Registers . . . . . . . . . . . . . . . . .85
5.5.1 Mode Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
5.5.2 Register Initialization Register . . . . . . . . . . . . . . . . . . . . . . .87
5.5.3 RAM Initialization Register . . . . . . . . . . . . . . . . . . . . . . . . . .88
5.5.4 EEPROM Initialization Register . . . . . . . . . . . . . . . . . . . . . .88
5.5.5 Miscellaneous Mapping Control Register . . . . . . . . . . . . . . .89
5.6 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
5.2 Introduction
The MCU can operate in eight different modes. Each mode has a
different default memory map and external bus configuration. After
reset, most system resources can be mapped to other addresses by
writing to the appropriate control registers.
Advance Information
MOTOROLA
Operating Modes and Resource Mapping
MC68HC812A4 — Rev. 3.0
79