Table 6-138 Timing Requirements for External Interrupts(1) (see Figure 6-87)
NO. |
|
1.3V, 1.2V, 1.1V, 1.0V |
UNIT |
MIN |
MAX |
1 |
tw(ILOW)
|
Width of the external interrupt pulse low |
2C(1)(2)
|
|
ns |
2 |
tw(IHIGH)
|
Width of the external interrupt pulse high |
2C(1)(2)
|
|
ns |
(1) The pulse width given is sufficient to generate an interrupt or an EDMA event. However, if a user wants to have the device recognize the GPIO changes through software polling of the GPIO register, the GPIO duration must be extended to allow the device enough time to access the GPIO register through the internal bus.
Figure 6-87 GPIO External Interrupt Timing