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MC68HC908QY2CDW Datasheet, PDF (153/184 Pages) Freescale Semiconductor, Inc – Microcontrollers
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5-V Control Timing
16.7 5-V Control Timing
Characteristic(1)
Symbol
Min
Max
Unit
Internal operating frequency
Internal clock period (1/fOP)
RST input pulse width low
IRQ interrupt pulse width low (edge-triggered)
IRQ interrupt pulse period
fOP (fBus)
—
8
MHz
tcyc
125
—
ns
tRL
100
—
ns
tILIH
100
—
ns
tILIL
Note(2)
—
tcyc
1. VDD = 4.5 to 5.5 Vdc, VSS = 0 Vdc, TA = TL to TH; timing shown with respect to 20% VDD and 70% VSS, unless otherwise
noted.
2. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 tcyc.
tRL
RST
tILIL
tILIH
IRQ
Figure 16-3. RST and IRQ Timing
MC68HC908QY/QT Family Data Sheet, Rev. 6
Freescale Semiconductor
153
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