MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 160

• Manufacturer Part Number: MC68HC908KX2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Computer Operating Properly Module (COP)
11.2 Introduction
11.3 Block Diagram
Technical Data
160
INTERNAL RESET SOURCES
RESET VECTOR FETCH
STOP INSTRUCTION
COPEN (FROM SIM)
(FROM CONFIG)
COP RATE SEL
(FROM CONFIG)
COPCTL WRITE
COPCTL WRITE
COP DISABLE
CGMXCLK
RESET
The computer operating properly (COP) module contains a free-running
counter that generates a reset if allowed to overflow. The COP module
helps software to recover from a runaway code. Periodically clearing the
COP counter will prevent a COP reset from occurring. The COP module
can be disabled through the COPD bit in the configuration (CONFIG)
register.
Computer Operating Properly Module (COP)
Figure 11-1. COP Block Diagram
COP MODULE
COP CLOCK
12-BIT COP PRESCALER
COP COUNTER
CLEAR
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
6-BIT COP COUNTER
SIM MODULE
RESET STATUS REGISTER
RESET CIRCUIT
MOTOROLA