MC68HC05P9ACDW FREESCALE [Freescale Semiconductor, Inc], MC68HC05P9ACDW Datasheet - Page 50

• Manufacturer Part Number: MC68HC05P9ACDW
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Resets and Interrupts
Resets
Power-On Reset
50
NOTE:
A reset immediately stops the operation of the instruction being
executed, initializes certain control bits, and loads the program counter
with a user-defined reset vector address. The following sources can
generate resets:
A positive transition on the V
The power-on reset is strictly for power-up conditions and cannot be
used to detect drops in power supply voltage.
A 4064 t
active allows the clock generator to stabilize. If the RESET pin is at logic
0 at the end of 4064 t
the signal on the RESET pin goes to logic 1.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Power-on reset (POR) circuit
RESET pin
COP watchdog
RESET
CYC
V
DD
(internal clock cycle) delay after the oscillator becomes
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Resets and Interrupts
POWER-ON RESET
COP WATCHDOG
(MASK OPTION)
CYC
Figure 17. Reset Sources
, the MCU remains in the reset condition until
DD
pin generates a power-on reset.
INTERNAL CLOCK
D
CK
RESET
LATCH
S
Q
RST
6-mc68hc05p9a
MOTOROLA
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