mc9s08qa4 Freescale Semiconductor, Inc, mc9s08qa4 Datasheet - Page 13

• Manufacturer Part Number: mc9s08qa4
• Description: Mc9s08qa4 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

3.8.1
1
2
3
4
5
Freescale Semiconductor
Bus frequency (t
Real-time interrupt internal oscillator period (see
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 should be held low during the power-up and for a hold time of t
rises above V
Period (μs)
Control Timing
LVD
cyc
.
1600
1400
1200
1000
= 1/f
800
600
400
200
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
0
–40
Bus
Parameter
2
)
Figure 9. Typical RTI Clock Period vs. Temperature
–40
5
4
DD
Asynchronous path
Asynchronous path
Synchronous path
Synchronous path
and 80% V
0
MC9S08QA4 Series, Rev. 2
Table 9. Control Timing
Table
Temperature (°C)
DD
20
9)
levels. Temperature range –40°C to 85°C.
2
3
2
3
t
t
40
Symbol
ILIH,
Rise
t
t
MSSU
t
t
f
extrst
t
MSH
ILIH
Bus
RTI
, t
t
IHIL
Fall
60
1.5 t
1.5 t
Min
700
100
100
100
500
100
—
—
0
cyc
cyc
80
Typical
100
1000
30
—
—
—
—
—
—
3
Electrical Characteristics
1
= +3 σ
= Mean
= –3 σ
1300
Max
10
—
—
—
—
—
—
—
MSH
after V
MHz
Unit
μs
ns
ns
ns
ns
ns
μs
DD
13