3850 datasheet(29/101 Pages) RENESAS

29 / 101 page

Rev.3.01

2003.06.20

page 29 of 97

3850 Group (Spec.H/A)

Fig. 21 Interrupt control

Fig. 22 Structure of interrupt-related registers

Interrupt disable flag (I)

Interrupt request

Interrupt request bit

Interrupt enable bit

BRK instruction

Reset

Interrupt edge selection register

INT0 active edge selection bit

INT1 active edge selection bit

INT2 active edge selection bit

INT3 active edge selection bit

Serial I/O2 / INT3 interrupt source bit

0 : INT3 interrupt selected

1 : Serial I/O2 interrupt selected

Not used (returns “0” when read)

(INTEDGE : address 003A16)

0 : Falling edge active

1 : Rising edge active

Interrupt request register 1

INT0 interrupt request bit

Reserved

INT1 interrupt request bit

INT2 interrupt request bit

INT3 / Serial I/O2 interrupt request bit

Reserved

Timer X interrupt request bit

Timer Y interrupt request bit

0 : No interrupt request issued

1 : Interrupt request issued

(IREQ1 : address 003C16)

Interrupt request register 2

Timer 1 interrupt request bit

Timer 2 interrupt request bit

Serial I/O1 reception interrupt request bit

Serial I/O1 transmit interrupt request bit

CNTR0 interrupt request bit

CNTR1 interrupt request bit

AD converter interrupt request bit

Not used (returns “0” when read)

(IREQ2 : address 003D16)

0 : No interrupt request issued

1 : Interrupt request issued

Interrupt control register 1

INT0 interrupt enable bit

Reserved(Do not write “1” to this bit.)

INT1 interrupt enable bit

INT2 interrupt enable bit

INT3 / Serial I/O2 interrupt enable bit

Reserved(Do not write “1” to this bit.)

Timer X interrupt enable bit

Timer Y interrupt enable bit

(ICON1 : address 003E16)

Interrupt control register 2

Timer 1 interrupt enable bit

Timer 2 interrupt enable bit

Serial I/O1 reception interrupt enable bit

Serial I/O1 transmit interrupt enable bit

CNTR0 interrupt enable bit

CNTR1 interrupt enable bit

AD converter interrupt enable bit

Not used (returns “0” when read)

(Do not write “1” to this bit.)

0 : Interrupts disabled

1 : Interrupts enabled

(ICON2 : address 003F16)

0 : Interrupts disabled

1 : Interrupts enabled

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