MC68HC812A4 Datasheet, PDF (153/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Advance Information — MC68HC812A4
Section 10. Clock Module
10.1 Contents
10.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
10.3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
10.3.1 Clock Generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155
10.4 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156
10.5 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156
10.5.1 Computer Operating Properly (COP) . . . . . . . . . . . . . . . . .156
10.5.2 Real-Time Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
10.5.3 Clock Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
10.5.4 Peripheral Clock Divider Chains. . . . . . . . . . . . . . . . . . . . .158
10.6 Registers and Reset Initialization . . . . . . . . . . . . . . . . . . . . . .161
10.6.1 Real-Time Interrupt Control Register . . . . . . . . . . . . . . . . .161
10.6.2 Real-Time Interrupt Flag Register . . . . . . . . . . . . . . . . . . .163
10.6.3 COP Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . .163
10.6.4 Arm/Reset COP Timer Register . . . . . . . . . . . . . . . . . . . . .166
Advance Information
MOTOROLA
Clock Module
MC68HC812A4 — Rev. 3.0
153