7540 datasheet(21/88 Pages) RENESAS

21 / 88 page

7540 Group

Rev.4.00

Jun 21, 2004

page 21 of 82

REJ03B0011-0400Z

Fig. 19 Interrupt control

Fig. 20 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 interrupt edge selection bit

0 : Falling edge active

1 : Rising edge active

INT1 interrupt edge selection bit

0 : Falling edge active

1 : Rising edge active

Not used (returns “0” when read)

P00 key-on wakeup enable bit

0 : Key-on wakeup enabled

1 : Key-on wakeup disabled

(INTEDGE : address 003A16, initial value : 0016)

Interrupt request register 1

Serial I/O1 receive interrupt request bit

Serial I/O1 transmit interrupt request bit

INT0 interrupt request bit

INT1 interrupt request bit

Key-on wake up interrupt request bit

CNTR0 interrupt request bit

CNTR1 interrupt request bit

Timer X interrupt request bit

0 : No interrupt request issued

1 : Interrupt request issued

(IREQ1 : address 003C16, initial value : 0016)

b0 Interrupt control register 1

Serial I/O1 receive interrupt enable bit

Serial I/O1 transmit interrupt enable bit

INT0 interrupt enable bit

INT1 interrupt enable bit (Do not write “1” to this bit for 32-pin version)

Key-on wake up interrupt enable bit

CNTR0 interrupt enable bit

CNTR1 interrupt enable bit

Timer X interrupt enable bit

0 : Interrupts disabled

1 : Interrupts enabled

(ICON1 : address 003E16, initial value : 0016)

Interrupt request register 2

Timer Y interrupt request bit

Timer Z interrupt request bit

Timer A interrupt request bit

Serial I/O2 interrupt request bit

A/D conversion interrupt request bit

Timer 1 interrupt request bit

Not used (returns “0” when read)

0 : No interrupt request issued

1 : Interrupt request issued

(IREQ2 : address 003D16, initial value : 0016)

b0 Interrupt control register 2

Timer Y interrupt enable bit

Timer Z interrupt enable bit

Timer A interrupt enable bit

Serial I/O2 interrupt enable bit

A/D conversion interrupt enable bit

Timer 1 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, initial value : 0016)

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