mc9s08qb8 Freescale Semiconductor, Inc, mc9s08qb8 Datasheet - Page 19

• Manufacturer Part Number: mc9s08qb8
• Description: 8-bit Hcs08 Central Processor Unit
• Manufacturer: Freescale Semiconductor, Inc

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