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MC68HC908QL4 Datasheet, PDF (210/226 Pages) Motorola, Inc – Microcontrollers
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Electrical Specifications
17.10 3.3-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)
—
4
MHz
tcyc
250
—
ns
tRL
200
—
ns
tILIH
200
—
ns
tILIL
Note(3)
—
tcyc
1. VDD = 3.0 to 3.6 Vdc, VSS = 0 Vdc, TA = TL to TH; timing shown with respect to 20% VDD and 70% VDD, 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 17-6. RST and IRQ Timing
17.11 Oscillator Characteristics
Characteristic
Internal oscillator frequency(1)
ICFS1:ICFS0 = 00
ICFS1:ICFS0 = 01
ICFS1:ICFS0 = 10 (not allowed if VDD <3.0V)
ICFS1:ICFS0 = 11 (not allowed if VDD < 4.5V)
Deviation from trimmed Internal oscillator (2)(3)
4, 8, 12.8, 25.6MHz, fixed voltage, fixed temp
Symbol
Min
—
fINTCLK
—
—
—
—
4, 8, 12.8MHz, VDD ± 10%, 0 to 70°C
4, 8, 12.8MHz, VDD ± 10%, –40 to 85°C
4, 8, 12.8MHz, VDD ± 10%, –40 to 105°C
4, 8, 12.8MHz, VDD ± 10%, –40 to 125°C
25.6MHz, VDD ± 10%, 0 to 70°C
25.6MHz, VDD ± 10%, –40 to 85°C
25.6MHz, VDD ± 10%, –40 to 105°C
25.6MHz, VDD ± 10%, –40 to 125°C
—
—
ACCINT
—
—
—
—
—
—
Typ
4
8
12.8
25.6
± 0.4
±2
—
—
—
±5
—
—
—
Max
Unit
—
—
MHz
—
—
—
—
±5
±5
±5
%
—
± 10
± 10
± 10
— Continued on next page
MC68HC908QL4 Data Sheet, Rev. 7
210
Freescale Semiconductor
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