MC908QT1 FREESCALE [Freescale Semiconductor, Inc], MC908QT1 Datasheet - Page 157

• Manufacturer Part Number: MC908QT1
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

16.11 3-V Control Timing
Freescale Semiconductor
Internal operating frequency
Internal clock period (1/f
RST input pulse width low
IRQ interrupt pulse width low (edge-triggered)
IRQ interrupt pulse period
1. V
2. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 t
noted.
DD
= 2.7 to 3.3 Vdc, V
RST
IRQ
OP
Characteristic
SS
)
= 0 Vdc, T
MC68HC908QY/QT Family Data Sheet, Rev. 5
A
Figure 16-7. RST and IRQ Timing
(1)
= T
L
to T
H
t
t
ILIH
RL
; timing shown with respect to 20% V
t
ILIL
f
Symbol
OP
t
t
t
t
ILIH
ILIL
cyc
(f
RL
Bus
)
Note
DD
Min
250
200
200
—
and 70% V
(2)
cyc
DD
Max
—
—
—
—
4
3-V Control Timing
.
, unless otherwise
MHz
Unit
t
ns
ns
ns
cyc
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