MC68HC705C8ACB Freescale Semiconductor, MC68HC705C8ACB Datasheet - Page 63

• Manufacturer Part Number: MC68HC705C8ACB
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705C8ACB

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 2.1MHz
• Interface Type: SCI/SPI
• Program Memory Type: EPROM
• Program Memory Size: 8KB
• Total Internal Ram Size: 304Byte
• # I/os (max): 24
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 42
• Package Type: SPDIP
• Lead Free Status / Rohs Status: Not Compliant

5.3.3.1 Programmable COP Watchdog Reset
MC68HC705C8A — Rev. 3
MOTOROLA
INTERNAL
COPRST
CLOCK
(f
OP
)
PROGRAMMABLE COP WATCHDOG (MC68HC705C8 TYPE)
4
Figure 5-1. Programmable COP Watchdog Diagram
4
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
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.
2
1. $55
2. $AA
•
•
Freescale Semiconductor, Inc.
2
Figure
For More Information On This Product,
2
COP reset register (COPRST), $001D
COP control register (COPCR), $001E
2
2
2
5-2.
Go to: www.freescale.com
2
2
2
2
2
Resets
2
2
2
2
Figure 5-1
2
2
2
13
2
CM0
CM1
2
2
2
2
2
15
17
19
21
is a diagram of the
2
2
2
PCOPE
Reset Sources
Technical Data
RESET
Resets