Datasheet

Electrical Characteristics
MC9RS08KB12 Series MCU Data Sheet, Rev. 5
Freescale Semiconductor 27
3.9.1 Control Timing
Figure 30. Reset Timing
Figure 31. KBI Pulse Width
Table 10. Control Timing
Num C Parameter Symbol Min Typical Max Unit
1 D Bus frequency (t
cyc
= 1/f
Bus
)f
Bus
0—10MHz
2 D Real time interrupt internal oscillator period t
RTI
700 1000 1300 μs
3 D External RESET pulse width
1
1
This is the shortest pulse guaranteed to pass through the pin input filter circuitry. Shorter pulses may or may not be recognized.
t
extrst
150 — — ns
4 D KBI pulse width
2
2
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.
t
KBIPW
1.5 t
cyc
——ns
5 D KBI pulse width in stop
1
t
KBIPWS
100 — — ns
6D
Port rise and fall time (load = 50 pF)
3
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
3
Timing is shown with respect to 20% V
DD
and 80% V
DD
levels. Temperature range –40 °C to 85 °C.
t
Rise
, t
Fall
—
—
11
35
—
—
ns
t
extrst
RESET
t
KBIPW
KBI Pin
t
KBIPW
KBI Pin
(rising or high level)
(falling or low level)
t
KBIPWS
t
KBIPWS