MC68HC705C8ACS

Manufacturer Part NumberMC68HC705C8ACS
ManufacturerFreescale Semiconductor, Inc
MC68HC705C8ACS datasheet
 
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Freescale Semiconductor, Inc.
5.3.3.1 Programmable COP Watchdog Reset
A timeout of the 18-stage ripple counter in the programmable COP
watchdog generates a reset.
programmable COP watchdog. Two registers control and monitor
operation of the programmable COP watchdog:
To clear the programmable COP watchdog and begin a new timeout
period, write these values to the COP reset register (COPRST).
See
Figure
1. $55
2. $AA
The $55 write must precede the $AA write. Instructions may be executed
between the write operations provided that the COP watchdog does not
time out before the second write.
PROGRAMMABLE COP WATCHDOG (MC68HC705C8 TYPE)
INTERNAL
CLOCK
4
2
2
(f
)
OP
4
2
COPRST
Figure 5-1. Programmable COP Watchdog Diagram
MC68HC705C8A — Rev. 3
MOTOROLA
For More Information On This Product,
Figure 5-1
COP reset register (COPRST), $001D
COP control register (COPCR), $001E
5-2.
2
2
2
2
2
2
2
2
2
13
2
2
2
2
2
2
Resets
Go to: www.freescale.com
Reset Sources
is a diagram of the
2
2
2
2
2
CM0
CM1
15
2
17
2
RESET
19
2
21
2
PCOPE
Technical Data
Resets