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MC908QC8MDRER Datasheet(PDF) 63 Page - Freescale Semiconductor, Inc |
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MC908QC8MDRER Datasheet(HTML) 63 Page - Freescale Semiconductor, Inc |
63 / 274 page MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 2 Freescale Semiconductor 63 Chapter 5 Computer Operating Properly (COP) 5.1 Introduction 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 clearing the COP counter periodically. The COP module can be disabled through the COPD bit in the configuration 1 (CONFIG1) register. 5.2 Functional Description Figure 5-1. COP Block Diagram 1. See Chapter 14 System Integration Module (SIM) for more details. COPCTL WRITE BUSCLKX4 STOP INSTRUCTION SIM RESET CIRCUIT RESET STATUS REGISTER INTERNAL RESET SOURCES(1) SIM MODULE 12-BIT SIM COUNTER COPD (FROM CONFIG1) RESET COPCTL WRITE CLEAR COP MODULE COPEN (FROM SIM) COP CLOCK COP RATE SELECT (COPRS FROM CONFIG1) 6-BIT COP COUNTER COP COUNTER |
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