
Interrupts ST72321xx-Auto
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Table 22. Interrupt sensitivity - ei2 (port B3..0)
IS11 IS10
External interrupt sensitivity
IPB bit = 0 IPB bit = 1
0 0 Falling edge and low level Rising edge and high level
0 1 Rising edge only Falling edge only
1 0 Falling edge only Rising edge only
1 1 Rising and falling edge
Table 23. Interrupt sensitivity - ei3 (port B7..4)
IS11 IS10 External interrupt sensitivity
0 0 Falling edge and low level
0 1 Rising edge only
1 0 Falling edge only
1 1 Rising and falling edge
Table 24. Interrupt sensitivity - ei0 (port A3..0)
IS21 IS20
External interrupt sensitivity
IPA bit = 0 IPA bit = 1
0 0 Falling edge and low level Rising edge and high level
0 1 Rising edge only Falling edge only
1 0 Falling edge only Rising edge only
1 1 Rising and falling edge
Table 25. Interrupt sensitivity - ei1 (port F2..0)
IS21 IS20 External interrupt sensitivity
0 0 Falling edge and low level
0 1 Rising edge only
1 0 Falling edge only
1 1 Rising and falling edge
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