MC68HC05P9ACDW FREESCALE [Freescale Semiconductor, Inc], MC68HC05P9ACDW Datasheet - Page 51

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

External Reset
7-mc68hc05p9a
MOTOROLA
A logic 0 applied to the RESET pin for one and one-half t
an external reset. A Schmitt trigger senses the logic level at the RESET
pin.
NOTES:
ADDRESS BUS
ADDRESS BUS
NOTES:
RESET Pulse Width
2. The next rising edge of the internal clock after the rising edge of RESET initiates the reset sequence.
1. Internal clock, internal address bus, and internal data bus are not available externally.
1. Power-on reset threshold is typically between 1 V and 2 V.
2. Internal clock, internal address bus, and internal data bus are not available externally.
Freescale Semiconductor, Inc.
INTERNAL
INTERNAL
INTERNAL
INTERNAL
INTERNAL
INTERNAL
DATA BUS
OSC1 PIN
DATA BUS
For More Information On This Product,
CLOCK
RESET
CLOCK
V
DD
(NOTE 1)
Go to: www.freescale.com
Characteristic
Resets and Interrupts
Figure 18. Power-On Reset Timing
Figure 19. External Reset Timing
Table 11. External Reset Timing
1FFE
t
RL
1FFE
1FFE
1FFE
1FFE
4064 t
1FFE
Symbol
CYC
1FFE
t
RL
NEW
PCH
1FFE
1FFF
NEW
PCL
Min
1.5
1FFE
Resets and Interrupts
NEW PC
DUMMY
CYC
Max
1FFE
NEW
—
PCH
NEW PC
generates
CODE
OP
1FFF
NEW
PCL
Resets
Unit
t
CYC
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