Datasheet

Electrical Characteristics
MC9S08QB8 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor 19
Figure 14. IRQ/KBIPx Timing
3.10.2 TPM 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.
Figure 15. Timer Input Capture Pulse
Table 13. TPM Input Timing
No. C Function Symbol Min Max Unit
1 D External clock frequency f
TEXT
DC 1/4 f
op
MHz
2 D External clock period t
TEXT
4—t
CYC
3 D External clock high time t
TCLKH
1.5 — t
CYC
4 D External clock low time t
TCLKL
1.5 — t
CYC
5 D Input capture pulse width f
ICPW
1.5 — t
CYC
t
IHIL
KBIPx
t
ILIH
IRQ/KBIPx
ipg_clk
t
CYC
EXTERNAL
CLOCK
INPUT
CAPTURE
t
TEXT
t
TCLKH
t
TCLKL
t
ICPW