Operation Of External Interrupt Circuit 1; Figure 10.6-1 External Interrupt Circuit 1 Settings - Fujitsu F2MC-8L Series Hardware Manual

10.6 Operation of External Interrupt Circuit 1

The external interrupt circuit 1 can detect a specified edge on a signal input to an
external interrupt pin.
Operation of External Interrupt Circuit 1
Figure 10.6-1 shows the settings required to operate the external interrupt circuit.
EIC1
EIC2
DDR3
: Used bit
* : Set the bit corresponding to the pin to be used to "0"
x : Unused bit
If the edge polarity on the input signal from the external interrupt pins (INT0 to INT2) matches
the edge polarity selected by the external interrupt 1 control register (EIC1, EIC2: SL00 to
SL21), the corresponding external interrupt request flag bit (EIC1, EIC2: EIR0 to EIR2) is set to
"1".
Figure 10.6-2 shows the operation when an external interrupt is input to the INT0 pin.

Figure 10.6-1 External Interrupt Circuit 1 Settings

Bit 7 Bit 6 Bit 5
EIR1 SL11 SL10
— — —
× * *
10.6 Operation of External Interrupt Circuit 1
Bit 4 Bit 3 Bit 2 Bit 1
EIE1 EIR0 SL01 SL00
— EIR2 SL21 SL20
* × ×
Bit 0
EIE0
EIE2
× ×
241