Product data

15
Classification—H8/300H
Software
Registers
Bus controller
o
Interrupts
Resets
Power-down mode
Instructions
Miscellaneous
DMA controller
ITU
Watchdog timer
SCI
A/D converter
I/O ports
Related Manuals
Manual Title
Other Technical
Documentation
Document Name
Related Microcomputer
Technical Q&A
Title
Question
References
Answer
Product H8/300H Q&A No. QA300H-014A
Topic Edge Rise and Fall Times for Interrupt Pins
When an edge trigger is used for an external interrupt, what are the
longest allowed rise and fall times of the edge?
Make it no more than 2 states. More than this will produce the following
effects:
1. Interrupts will not be accepted because the edge change is not
detected.
2. More than one edge will be detected internally for each change in
the external pin signal, so multiple interrupts will be requested.
Technical Questions and Answers