mc68hc908gr8vp Freescale Semiconductor, Inc, mc68hc908gr8vp Datasheet - Page 254

• Manufacturer Part Number: mc68hc908gr8vp
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Electrical Specifications
23.7 3.0 V Control Timing
254
Frequency of operation
Internal operating frequency
Internal clock period (1/f
RST input pulse width low
IRQ interrupt pulse width low
IRQ interrupt pulse period
16-bit timer
1. V
2. See
3. No more than 10% duty cycle deviation from 50%
4. Some modules may require a minimum frequency greater than dc for proper operation. See appropriate table for this in-
5. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a reset.
6. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
7. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
8. The minimum period, t
Input capture pulse width
Input capture period
Crystal option
External clock option
(edge-triggered)
formation.
routine plus t
SS
= 0 Vdc; timing shown with respect to 20% V
23.8 Clock Generation Module Characteristics
(7)
CYC
.
(2)
(3)
OP
ILIL
(5)
)
Characteristic
(6)
or t
TLTL
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
, should not be less than the number of cycles it takes to execute the interrupt service
(1)
DD
for more information.
and 70% V
SS
unless otherwise noted.
Symbol
t
TH,
t
f
t
t
t
t
TLTL
osc
f
ILIH
IRL
ILIL
op
cyc
t
TL
Note 8
Note 8
dc
Min
244
125
125
32
—
(4)
Freescale Semiconductor
Max
16.4
100
4.1
—
—
—
—
—
—
Unit
MHz
MHz
kHz
t
t
ns
ns
ns
ns
cyc
cyc