MC9RS08LA8 Datasheet, PDF (18/34 Pages) Freescale Semiconductor, Inc – MCU Block Diagram

Electrical Characteristics
RESET
t_extrst
Figure 10. Reset Timing
KBI Pin
(rising or high level)
t_KBIPWS
t_KBIPW
KBI Pin
(falling or low level)
tt_KKBBIIPPWWS
Figure 11. KBI Pulse Width
3.8.2 TPM/MTIM Module Timing
Synchronizer circuits determine the shortest input pulses that can be recognized or the fastest clock that
can be used as the optional external source to the timer counter. These synchronizers operate from the
current bus rate clock.
Table 11. TPM/MTIM Input Timing
Function
External clock frequency
External clock period
External clock high time
External clock low time
Input capture pulse width
Symbol
Min
f_TCLK
0
t_TCLK
4
t_clkh
1.5
t_clkl
1.5
f_ICPW
1.5
Max
f_Bus1/4
—
—
—
—
Unit
MHz
t_CYC
t_CYC
t_CYC
t_CYC
t_clkh
t_TCLK
TCLK
t_clkl
Figure 12. Timer External Clock
MC9RS08LA8 Series MCU Data Sheet, Rev. 1
18
Freescale Semiconductor