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MC68HC908QL4 Datasheet, PDF (207/226 Pages) Motorola, Inc – Microcontrollers
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17.7 5-V Control Timing
5-V Control Timing
Characteristic(1)
Symbol
Min
Max
Unit
Internal operating frequency
fOP
(fBUS)
—
8
MHz
Internal clock period (1/fOP)
RST input pulse width low(2)
IRQ interrupt pulse width low (edge-triggered)(2)
IRQ interrupt pulse period(2)
tcyc
125
—
ns
tRL
100
—
ns
tILIH
100
—
ns
tILIL
Note(3)
—
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. Values are based on characterization results, not tested in production.
3. 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 17-3. RST and IRQ Timing
17.8 3.3-V DC Electrical Characteristics
Characteristic(1)
Output high voltage
ILoad = –0.6 mA, all I/O pins
ILoad = –4.0 mA, all I/O pins
ILoad = –10.0 mA, PTA0, PTA1, PTA3–PTA5 only
Maximum combined IOH (all I/O pins)
Output low voltage
ILoad = 0.5 mA, all I/O pins
ILoad = 6.0 mA, all I/O pins
ILoad = 10.0 mA, PTA0, PTA1, PTA3–PTA5 only
Maximum combined IOL (all I/O pins)
Input high voltage
PTA0–PTA5, PTB0–PTB7
Input low voltage
PTA0–PTA5, PTB0–PTB7
Symbol
VOH
IOHT
VOL
IOHL
VIH
VIL
Min
VDD – 0.3
VDD – 1.0
VDD – 0.8
—
—
—
—
—
0.7 x VDD
VSS
Typ(2)
Max
—
—
—
—
—
—
—
50
—
0.3
—
1.0
—
0.8
—
50
—
VDD
—
0.3 x VDD
Unit
V
mA
V
mA
V
V
— Continued on next page
MC68HC908QL4 Data Sheet, Rev. 7
Freescale Semiconductor
207
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