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MC68HC908QC16_07 Datasheet, PDF (240/274 Pages) Freescale Semiconductor, Inc – Microcontrollers
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Electrical Specifications
19.7 5-V Control Timing
Characteristic(1)
Symbol
Min
Max
Unit
Internal operating frequency
Internal clock period (1/fOP)
RST input pulse width low(2)
IRQ interrupt pulse width low (edge-triggered)(2)
IRQ interrupt pulse period(2)
fOP
(fBUS)
—
8
MHz
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 19-3. RST and IRQ Timing
19.8 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, PTC3–PTC0, PTD7–PTD0
Input low voltage
PTA0–PTA5, PTB0–PTB7, PTC3–PTC0, PTD7–PTD0
Symbol
VOH
IOHT
VOL
IOHL
VIH
VIL
Min
Typ(2)
Max
VDD – 0.3
—
—
VDD – 1.0
—
—
VDD – 0.8
—
—
—
—
50
—
—
—
—
0.7 x VDD
VSS
—
0.3
—
1.0
—
0.8
—
50
—
VDD
—
0.3 x VDD
Unit
V
mA
V
mA
V
V
— Continued on next page
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 3
240
Freescale Semiconductor
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