MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 59

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MC68HC708XL36

Manufacturer Part Number
MC68HC708XL36
Description
HCMOS Microcontroller Unit
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
Power-On Reset
3-ri24_e
MOTOROLA
A power-on reset (POR) is an internal reset caused by a positive
transition on the V
1. PORRST is an internally generated power-on reset pulse.
CGMXCLK
INTERNAL
PORRST
CGMXCLK
INTERNAL
CGMOUT
RST PIN
RST PIN
Freescale Semiconductor, Inc.
RESET
RESET
OSC1
For More Information On This Product,
Holds the clocks to the CPU and modules inactive for an oscillator
stabilization delay of 4096 CGMXCLK cycles.
Drives the RST pin low during the oscillator stabilization delay.
Releases the RST pin 32 CGMXCLK cycles after the oscillator
stabilization delay.
Releases the CPU to begin the reset vector sequence 64
CGMXCLK cycles after the oscillator stabilization delay.
Sets the POR bit in the reset status register and clears all other
bits in the register.
(1)
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Resets and Interrupts
Figure 2. Power-On Reset Recovery
DD
Figure 1. Internal Reset Timing
CYCLES
PULLED LOW BY MCU
4096
pin. A power-on reset:
32 CYCLES
CYCLES
32
CYCLES
32
32 CYCLES
Resets and Interrupts
MC68HC708XL36
Resets
59

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