MC68HC705C8ACFN Freescale Semiconductor, MC68HC705C8ACFN Datasheet - Page 63

• Manufacturer Part Number: MC68HC705C8ACFN
• Description: IC MCU 4MHZ 8K OTP 44-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705C8ACFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 304 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

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
63