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MC68HC908GT16 Datasheet, PDF (388/412 Pages) Motorola, Inc – Microcontrollers
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Electrical Specifications
23.8 5.0-V Control Timing
Characteristic(1)
Symbol
Min
Max
Unit
Internal operating frequency
fOP (fBus)
—
8
MHz
Internal clock period (1/fOP)
tCYC
122
—
ns
RESET input pulse width low(2)
tIRL
50
—
ns
IRQ interrupt pulse width low(3) (edge-triggered)
tILIH
50
—
ns
IRQ interrupt pulse period
tILIL
Note 5
—
tCYC
16-bit timer(4)
Input capture pulse width
Input capture period
tTH,tTL
tTLTL
Note 5
—
ns
—
tCYC
1. VSS = 0 Vdc; timing shown with respect to 20% VDD and 70% VDD unless otherwise noted.
2. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a
reset.
3. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
4. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
5. The minimum period, tILIL or tTLTL, should not be less than the number of cycles it takes to execute the interrupt
service routine plus tCYC.
23.9 3.0-V Control Timing
Characteristic(1)
Symbol
Min
Max
Unit
Internal operating frequency
fOP (fBus)
—
4
MHz
Internal clock period (1/fOP)
tCYC
244
—
ns
RESET input pulse width low(2)
tIRL
125
—
ns
IRQ interrupt pulse width low(3) (edge-triggered)
tILIH
125
—
ns
IRQ interrupt pulse period
tILIL
Note 5
—
tCYC
16-bit timer(4)
Input capture pulse width
Input capture period
tTH,tTL
tTLTL
Note 5
—
ns
—
tCYC
1. VSS = 0 Vdc; timing shown with respect to 20% VDD and 70% VDD unless otherwise noted.
2. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a
reset.
3. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
4. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to be recognized.
5. The minimum period, tILIL or tTLTL, should not be less than the number of cycles it takes to execute the interrupt
service routine plus tCYC.
Technical Data
388
MC68HC908GT16 • MC68HC908GT8 — Rev. 2
Electrical Specifications
MOTOROLA
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