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MC68HC705P9 Datasheet, PDF (70/160 Pages) Motorola, Inc – HCMOS Microcontroller Unit　
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Freescale Semiconductor, Inc.
Resets and Interrupts
IRQ/VPP pin. An external interrupt request, shown in Figure 5-5, is
latched as long as any source is holding the IRQ/VPP pin low.
IRQ/VPP PIN
IRQ1
.
.
.
IRQn
IRQ (INTERNAL)
tILIL
tILIH
tILIH
Figure 5-5. External Interrupt Timing
Table 5-2. External Interrupt Timing (VDD = 5.0 Vdc)(1)
Characteristic
Symbol Min Max Unit
Interrupt Pulse Width Low (Edge-Triggered)
tILIH
125
— ns
Interrupt Pulse Period
tILIL
Note(2) — tCYC
1. VDD = 5.0 Vdc ±10%, VSS = 0 Vdc, TA = TL to TH
2. The minimum tILIL should not be less than the number of interrupt service routine cycles plus
19 tCYC.
Table 5-3. External Interrupt Timing (VDD = 3.3 Vdc)(1)
Characteristic
Symbol Min Max Unit
Interrupt Pulse Width Low (Edge-Triggered)
tILIH
250
— ns
Interrupt Pulse Period
tILIL
Note(2) — tCYC
1. VDD = 3.3 Vdc ±10%, VSS = 0 Vdc, TA = TL to TH
2. The minimum tILIL should not be less than the number of interrupt service routine cycles plus
19 tCYC.
Technical Data
70
Resets and Interrupts
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MC68HC705P9 — Rev. 4.0
MOTOROLA
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