
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 (tcyc = 1/fBus)fBus
0—
10
MHz
2
D
Real time interrupt internal oscillator period
tRTI
700
1000
1300
μs
3
D
External RESET pulse width1
1 This is the shortest pulse guaranteed to pass through the pin input filter circuitry. Shorter pulses may or may not be recognized.
textrst
150
—
ns
4
D
KBI pulse width2
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.
tKBIPW
1.5 tcyc
——
ns
5
D
KBI pulse width in stop1
tKBIPWS
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% VDD levels. Temperature range –40 °C to 85 °C.
tRise, tFall
—
11
35
—
ns
textrst
RESET
tKBIPW
KBI Pin
tKBIPW
KBI Pin
(rising or high level)
(falling or low level)
tKBIPWS