Assertion of INT0# pin on FX does not trigger an Interrupt | Cypress Semiconductor
Support & Community
Assertion of INT0# pin on FX does not trigger an Interrupt
For how long the INT0# pin should be asserted for an interrupt event to be detected?
The INT0# pulse needs to be at least 4 CLKOUT cycles long in order for the interrupt to be detected by the 8051 core. Check that this is being satisfied as a minimum requirement.