Operations Of External Interrupt Circuit 1 - Fujitsu F2MC-8L F202RA Hardware Manual

10.6

Operations of External Interrupt Circuit 1

The external interrupt circuit 1 can detect a specified edge or edges of a signal input to
any of the external interrupt pins.
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Operation of External Interrupt Circuit 1
To operate external interrupt circuit 1, the bits of the registers must be set as shown in Figure 10.6-1 .
EIC1
EIC2
DDR3
TCR2
0
When the polarity of an edge or edges of a signal input from one of the external interrupt pins 1 (INT10 to
INT12) matches the selected edge polarity for the pin stored in the appropriate external interrupt control
register (EIC1, EIC2:SL00 to SL21), one of the external interrupt request flag bits (EIC1, EIC2:EIR0 to
EIR2) corresponding to the pin is set to "1".
Figure 10.6-1 Setting External Interrupt Circuit 1
bit7 bit6 bit5
EIR1 SL11 SL10
0 0
: Used bit
: Unused bit
: Set "0"
CHAPTER 10 EXTERNAL INTERRUPT CIRCUIT 1 (EDGE)
bit4 bit3 bit2
EIE1 EIR0 SL01
EIR2 SL21
0
bit1 bit0
SL00 EIE0
SL20 EIE2
PEN TSEL
0
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