mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 178

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Electrical Specifications
17.6 Control Timing
Data Sheet
178
Low-voltage inhibit reset, trip falling voltage (LVR)
Low-voltage inhibit reset, trip rising voltage (LVR)
Low-voltage inhibit reset/recover hysteresis
Low-voltage detect, trip falling voltage (LVD)
Low-voltage detect, trip rising voltage (LVD)
Low-voltage detect reset/recover hysteresis
Internal operating frequency
Internal clock period (1/f
RST input pulse width low
IRQ interrupt pulse width low (edge-triggered)
IRQ interrupt pulse period
1. V
2. Typical values reflect average measurements at V
3. Maximum is highest voltage that POR is guaranteed.
4. If minimum V
5. R
1. V
2. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 t
V
DD
DD
PU
DD
is measured at V
= V
> 2.2 V, V
is reached.
DDMIN
DD
SS
to V
is not reached before the internal POR reset is released, the LVI will hold the part in reset until minimum
Characteristic
= 0 Vdc; timing shown with respect to 20% V
RST
DDMAX
IRQ
OP
DD
Characteristic
)
= 3.0 V.
, V
SS
= 0 Vdc, T
Freescale Semiconductor, Inc.
(1)
For More Information On This Product,
Figure 17-1. RST and IRQ Timing
(1)
A
= T
Go to: www.freescale.com
L
t
Electrical Specifications
t
ILIH
RL
to T
DD
H
, unless otherwise noted.
= 3.0 V, 25°C only.
t
ILIL
Symbol
V
V
V
V
V
V
DTRIPR
DTRIPF
TRIPF
TRIPR
DHYS
HYS
DD
and 70% V
f
Symbol
OP
t
t
t
t
ILIH
ILIL
cyc
RL
(f
2.00
2.04
2.20
2.21
Min
DD
—
—
Bus
unless otherwise noted.
)
Note
Typ
Min
500
400
400
2.12
2.18
2.32
2.33
—
60
10
(2)
MC68HC908QF4 — Rev. 1.0
(2)
cyc
.
Max
2.24
2.30
2.44
2.45
Max
—
—
—
—
—
—
2
MOTOROLA
MHz
Unit
Unit
mV
mV
t
ns
ns
ns
cyc
V
V
V
V