mc68hc908rk2 Freescale Semiconductor, Inc, mc68hc908rk2 Datasheet - Page 162

• Manufacturer Part Number: mc68hc908rk2
• Description: Hcmos Microcontroller Unit
• Manufacturer: Freescale Semiconductor, Inc

Computer Operating Properly Module (COP)
11.2 Introduction
11.3 Functional Description
Advance Information
162
The computer operating properly (COP) module contains a free-running
counter that generates a reset if allowed to overflow. The COP module
helps software recover from runaway code. Prevent a COP reset by
periodically clearing the COP counter.
INTERNAL RESET SOURCES
RESET VECTOR FETCH
COPRS FROM CONFIG
COPD FROM CONFIG
STOP INSTRUCTION
Computer Operating Properly Module (COP)
COPCTL WRITE
COPCTL WRITE
CGMXCLK
RESET
Figure 11-1. COP Block Diagram
12-BIT COP PRESCALER
CLEAR COP
COUNTER
6-BIT COP COUNTER
MC68HC908RK2
RESET
RESET STATUS
REGISTER
MOTOROLA
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Rev. 4.0