mc9s08sf4 Freescale Semiconductor, Inc, mc9s08sf4 Datasheet - Page 18

• Manufacturer Part Number: mc9s08sf4
• Description: Mc9s08sf4 Series Freescale Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

AC Characteristics
3.9.1
18
1
2
3
4
5
Bus frequency (t
External reset pulse width
IRQ pulse width
KBIPx pulse width
Port rise and fall time (load = 50 pF)
BKGD/MS setup time after issuing background debug force
reset to enter user or BDM modes
BKGD/MS hold time after issuing background debug force
reset to enter user or BDM modes
Data in Typical column was characterized at 5.0 V, 25 °C.
This is the shortest pulse that is guaranteed to be recognized.
This is the minimum pulse width that is guaranteed to pass through the pin synchronization circuitry. Shorter pulses may or
may not be recognized. In stop mode, the synchronizer is bypassed so shorter pulses can be recognized in that case.
Timing is shown with respect to 20% V
To enter BDM mode following a POR, BKGD/MS should be held low during the power-up and for a hold time of t
rises above V
Slew rate control enabled (PTxSE = 1)
Slew rate control disabled (PTxSE = 0)
Asynchronous path
Synchronous path
Asynchronous path
Synchronous path
Control Timing
LVD
cyc
.
= 1/f
3
3
RESET PIN
2
2
Parameter
Bus
2
)
IRQ/KBIPx
IRQ/KBIPx
5
4
MC9S08SF4 Series MCU Data Sheet, Rev. 2
DD
and 80% V
Figure 15. IRQ/KBIPx Timing
Figure 14. Reset Timing
Table 9. Control Timing
DD
levels. Temperature range –40°C to 125°C.
t
t
t
t
t
IHIL
ILIH
Symbol
ILIH,
ILIH,
Rise
t
t
MSSU
t
f
extrst
MSH
t
Bus
extrst
, t
t
t
IHIL
IHIL
Fall
1.5 t
1.5 t
Min
100
100
100
500
100
—
—
1
cyc
cyc
Typical
30
—
—
—
—
—
—
3
1
Freescale Semiconductor
Max
20
—
—
—
—
—
—
—
MSH
after V
MHz
Unit
μs
ns
ns
ns
ns
ns
DD