MC68HC05K1 FREESCALE [Freescale Semiconductor, Inc], MC68HC05K1 Datasheet - Page 55

• Manufacturer Part Number: MC68HC05K1
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

5.3.2 External Reset
MC68HC05K0 • MC68HC05K1 — Rev. 2.0
INTERNAL ADDRESS BUS
RESET
V
DD
NOTE:
ILLEGAL ADDRESS RESET
An external reset is generated by applying a logic 0 for 1 1/2 t
RESET pin. A Schmitt trigger senses the logic level at the RESET pin.
A COP reset or an illegal address reset pulls the RESET pin low for one
internal clock cycle. A low-voltage reset pulls the RESET pin low for as
long as the low-voltage condition exists.
To avoid overloading some power supply designs, do not connect the
RESET pin directly to V
LOW-VOLTAGE RESET
POWER-ON RESET
COP WATCHDOG
(MASK OPTION)
(MASK OPTION)
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 5-1. Reset Sources
Go to: www.freescale.com
Resets
DD
. Use a pullup resistor of 10 k or more.
INTERNAL
CLOCK
D
RESET
LATCH
S
R
RST
SUBSYSTEMS
TO CPU AND
Technical Data
Reset Types
cyc
to the
Resets