mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 377

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

24.8 5.0V Control Timing
24.9 3.0V Control Timing
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
Notes:
Notes:
Notes:
Low-voltage inhibit, trip voltage
(No hysteresis implemented for 3V LVI)
Schmitt trigger input low level trip voltage
RST, IRQ1, IRQ2, KBI[0:7]
Schmitt trigger input high level trip voltage
RST, IRQ1, IRQ2, KBI[0:7]
Internal operating frequency
RST input pulse width low
Internal operating frequency
RST input pulse width low
1. V
2. Typical values reflect average measurements at midpoint of voltage range, 25 °C only.
3. Run (operating) I
4. Wait I
5. STOP I
6. Maximum is highest voltage that POR is guaranteed.
7. If minimum V
8. R
1. V
2. Some modules may require a minimum frequency greater than dc for proper operation; see appropriate table for this
3. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a reset.
1. V
2. Some modules may require a minimum frequency greater than dc for proper operation; see appropriate table for this
3. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a reset.
100 pF on all outputs. C
Measured with all modules enabled.
all outputs. C
V
information.
information.
DD
SS
SS
DD
PU1
= 0 Vdc; timing shown with respect to 20% V
= 0 Vdc; timing shown with respect to 20% V
= 2.7 to 3.3 Vdc, V
is reached.
and R
DD
DD
measured using external square wave clock source. All inputs 0.2 V from rail. No dc loads. Less than 100 pF on
measured with OSC1 grounded, no port pins sourcing current.
PU2
DD
L
= 20 pF on OSC2. All ports configured as inputs. OSC2 capacitance linearly affects wait I
are measured at V
is not reached before the internal POR reset is released,
DD
Characteristic
measured using external square wave clock source. All inputs 0.2 V from rail. No dc loads. Less than
Characteristic
Characteristic
SS
L
(3)
(3)
= 0 Vdc, T
= 20 pF on OSC2. All ports configured as inputs. OSC2 capacitance linearly affects run I
Table 24-5. 3V DC Electrical Characteristics
(2)
(2)
DD
(1)
A
= 5.0V.
Table 24-6. 5V Control Timing
Table 24-7. 3V Control Timing
= T
(1)
(1)
L
to T
Electrical Specifications
H
, unless otherwise noted.
DD
DD
and 70% V
and 70% V
Symbol
V
V
V
SCMTH
SCMTL
LVI3
DD
DD
, unless otherwise noted.
, unless otherwise noted.
Symbol
Symbol
RST
t
t
f
f
IRL
IRL
OP
OP
Min
2.32
must be driven low externally until minimum
—
—
Min
750
Min
1.5
—
—
Typ
2.49
0.8
1.2
(2)
Electrical Specifications
Max
Max
5.0V Control Timing
8.0
4.0
—
—
Max
2.68
DD
—
—
.
Data Sheet
MHz
MHz
Unit
Unit
µs
ns
Unit
V
V
V
DD
377
.