mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 75

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 6
Computer Operating Properly (COP)
6.1 Introduction
This section describes the computer operating properly module, a free-running counter that generates a
reset if allowed to overflow. The computer operating properly (COP) module helps software recover from
runaway code. Prevent a COP reset by periodically clearing the COP counter.
6.2 Functional Description
Figure 6-1
in
Freescale Semiconductor
Figure
Note 1. See
INTERNAL RESET SOURCES(1)
6-2.
shows the structure of the COP module. A summary of the input/output (I/O) register is shown
RESET VECTOR FETCH
COPD (FROM CONFIG)
14.3.2 Active Resets from Internal
COPCTL WRITE
COPCTL WRITE
CGMXCLK
RESET
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
COP MODULE
Figure 6-1. COP Block Diagram
13-BIT SIM COUNTER
COP COUNTER
CLEAR
6-BIT COP COUNTER
Sources.
SIM
SIM RESET STATUS REGISTER
SIM RESET CIRCUIT
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