Figure 12.3.1 External Interrupt 1 Control Register (Eic1) - Fujitsu F2MC-8L MB89620 Series Hardware Manual

12.3 Structure of External Interrupt Circuit
12.3.1 External Interrupt 1 Control Register (EIC1)
The external interrupt 1 control register (EIC1) is used to select the edge polarity and
to control interrupts for external interrupt pins (INT0, INT1).
n External Interrupt 1 Control Register (EIC1)
Address
0024
H
R/W : Readable and writable
—
X
236
CHAPTER 12 EXTERNAL INTERRUPT CIRCUIT (EDGE)
Bit 7 Bit 6 Bit 5 Bit 4
EIR1 — SEL1 EIE1
R/W R/W R/W
INT0 (IRQ0)
INT1 (IRQ1)
: Unused
: Indeterminate
: Initial value

Figure 12.3.1 External Interrupt 1 Control Register (EIC1)

Bit 3 Bit 2 Bit 1
EIR0 — SEL0
R/W R/W
EIE0 Interrupt request enable bit 0
0 Disables interrupt request output.
1 Enables interrupt request output.
SEL0 Edge polarity selection bit 0
0 Rising edge
1 Falling edge
External interrupt request flag bit 0
EIR0
Read
0
The specified edge has not been input. Clears this bit.
1
The specified edge has been input.
EIE1 Interrupt request enable bit 1
0 Disables interrupt request output.
1 Enables interrupt request output.
SEL1 Edge polarity selection bit 1
0 Rising edge
1 Falling edge
External interrupt request flag bit 1
EIR1
Read
0 The specified edge has not been input. Clears this bit.
1
The specified edge has been input.
Bit 0 Initial value
EIE0 0X000X00
B
R/W
Write
No effect. The bit does not change.
Write
No effect. The bit does not change.
MB89620 series