Fujitsu MB89202, F202RA manual External Interrupt Control Register 1 EIC1

CHAPTER 10 EXTERNAL INTERRUPT CIRCUIT 1 (EDGE)

10.4.1External Interrupt Control Register 1 (EIC1)

External interrupt control register 1 (EIC1) comprises bits for edge polarity selection and interrupt control for the INT10 and INT11 external interrupt pins.

■External Interrupt Control Register 1 (EIC1)

Figure 10.4-2 External Interrupt Control Register 1 (EIC1)

Address

0024H

bit7

EIR1

R/W

bit6

SL11

R/W

bit5

SL10

R/W

bit4

EIE1

R/W

bit3

EIR0

R/W

bit2

SL01

R/W

bit1

SL00

R/W

bit0

EIE0

R/W

Initial value 00000000 B

EIE0 Interrupt request enable bit 0

0Disables interrupt request outputs

1Enables interrupt request outputs

SL01	SL00	Edge polarity selection bits 0
0	0	Edge detection OFF
0	1	Rising edge
1	0	Falling edge
1	1	Both edges

EIR0	External interrupt request flag bit 0
	When being read	When being written
0	Signal input with specified edge	This bit is cleared
	or edges not detected
1	Signal input with specified edge	No change, does not affect other
	or edges detected	operations
EIE1	Interrupt request enable bit 1

0Disables interrupt request outputs

1Enables interrupt request outputs

SL11

0

0

1

1

EIR1

0

1

SL10 Edge polarity selection bits 1

0Edge detection OFF

1Rising edge

0Falling edge

1Both edges

External interrupt request flag bit 1

When being read	When being written
Signal input with specified edge	This bit is cleared
or edges not detected
Signal input with specified edge	No change, does not affect other
or edges detected	operations

R/W : Readable/Writable : Initial value

232