Freescale Semiconductor, Inc.
Computer Operating Properly (COP) Module
I/O Signals
14.4 I/O Signals
This subsection describes the signals shown in Figure 14-1.
12-BIT COP PRESCALER
CGMXCLK
S
2
E
–
4
G
S
S
L
T
A
A
STOP INSTRUCTION
INTERNAL RESET SOURCES
RESET VECTOR FETCH
COPCTL WRITE
RESET
RESET STATUS
REGISTER
6-BIT COP COUNTER
COPD FROM CONFIG-1
RESET
CLEAR COP
COUNTER
COPCTL WRITE
COPL FROM CONFIG-1
Figure 14-1. COP Block Diagram
14.4.1 CGMXCLK
CGMXCLK is the crystal oscillator output signal. CGMXCLK frequency
is equal to the crystal frequency.
14.4.2 STOP Instruction
The STOP instruction clears the COP prescaler.
MC68HC908AS60 — Rev. 1.0
Technical Data
Computer Operating Properly (COP) Module
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