mc9s08qd4 Freescale Semiconductor, Inc, mc9s08qd4 Datasheet - Page 188

• Manufacturer Part Number: mc9s08qd4
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Appendix A Electrical Characteristics
A.8
This section describes AC timing characteristics for each peripheral system.
A.8.1
1
2
3
4
5
188
Bus frequency (t
Real-time interrupt internal oscillator period
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 3.0 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 must 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
AC Characteristics
Control Timing
LVD
cyc
.
= 1/f
3
3
2
2
RESET PIN
Bus
Parameter
2
)
5
4
MC9S08QD4 Series MCU Data Sheet, Rev. 3
DD
and 80% V
Figure A-12. Reset Timing
Table A-8. Control Timing
DD
levels. Temperature range –40°C to 125°C.
t
t
t
Symbol
ILIH,
ILIH,
Rise
t
t
MSSU
t
t
f
extrst
t
MSH
extrst
Bus
RTI
, t
t
t
IHIL
IHIL
Fall
1.5 t
1.5 t
Min
700
100
100
100
500
100
—
—
1
cyc
cyc
Typical
30
—
—
—
—
—
—
—
3
1
Freescale Semiconductor
1300
Max
—
—
—
—
—
—
—
8
MSH
after V
MHz
Unit
μs
ns
ns
ns
ns
ns
μs
DD