MC9RS08KB12 Datasheet, PDF (26/48 Pages) Freescale Semiconductor, Inc – MCU Block Diagram

Electrical Characteristics
3.9.1 Control Timing
Table 10. Control Timing
Num C
Parameter
Symbol
Min
Typical
Max
Unit
1
D Bus frequency (t_cyc = 1/f_Bus)
f_Bus
0
—
10
MHz
2
D Real time interrupt internal oscillator period
3
D External RESET pulse width¹
4
D KBI pulse width²
5
D KBI pulse width in stop¹
Port rise and fall time (load = 50 pF)³
6
D
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
t_RTI
t_extrst
t_KBIPW
t_KBIPWS
t_Rise, t_Fall
700
150
1.5 t_cyc
100
—
—
1000
—
—
—
11
35
1300
μs
—
ns
—
ns
—
ns
—
ns
—
1 _{This is the shortest pulse guaranteed to pass through the pin input filter circuitry. Shorter pulses may or may not be recognized.}
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.
3 _{Timing is shown with respect to 20% VDD and 80% VDD levels. Temperature range –40 °C to 85 °C.}
RESET
t_extrst
Figure 29. Reset Timing
KBI Pin
(rising or high level)
t_KBIPWS
t_KBIPW
KBI Pin
(falling or low level)
t_KBIPW
t_KBIPWS
Figure 30. KBI Pulse Width
MC9RS08KB12 Series MCU Data Sheet, Rev. 3
26
Freescale Semiconductor