mc68hc908gr16 Freescale Semiconductor, Inc, mc68hc908gr16 Datasheet - Page 259

• Manufacturer Part Number: mc68hc908gr16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

20.7 5.0-Volt Control Timing
20.8 3.3-Volt Control Timing
Freescale Semiconductor
Frequency of operation
Internal operating frequency
Internal clock period (1/f
RESET input pulse width low
IRQ interrupt pulse width low
IRQ interrupt pulse period
Frequency of operation
Internal operating frequency
Internal clock period (1/f
RESET input pulse width low
IRQ interrupt pulse width low
IRQ interrupt pulse period
1. V
2. No more than 10% duty cycle deviation from 50%.
3. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a reset.
4. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
1. V
2. No more than 10% duty cycle deviation from 50%.
3. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a reset.
4. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
Crystal option
External clock option
Crystal option
External clock option
SS
SS
= 0 Vdc; timing shown with respect to 20% V
= 0 Vdc; timing shown with respect to 20% V
RST
IRQ
(2)
(2)
OP
OP
Characteristic
Characteristic
)
)
(3)
(4)
(3)
(4)
(edge-triggered)
(edge-triggered)
Figure 20-1. RST and IRQ Timing
MC68HC908GR16 Data Sheet, Rev. 5.0
(1)
(1)
t
t
ILIH
RL
DD
DD
and 70% V
and 70% V
t
ILIL
DD
DD
unless otherwise noted.
unless otherwise noted.
f
f
Symbol
Symbol
OP
OP
f
t
f
t
t
t
t
t
t
t
OSC
CYC
OSC
CYC
ILIH
ILIH
ILIL
ILIL
IRL
IRL
(f
(f
Bus
Bus
)
)
Note 5
Note 5
Min
Min
122
244
125
125
32
dc
50
50
32
dc
—
—
5.0-Volt Control Timing
Max
32.8
Max
16.4
100
100
8.2
4.1
—
—
—
—
—
—
—
—
Unit
MHz
MHz
t
Unit
MHz
MHz
t
kHz
kHz
CYC
CYC
ns
ns
ns
ns
ns
ns
259