Renesas PCA4738L-64A Información técnica descargar pdf (Pagina 26)

23

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3822 Group

MITSUBISHI MICROCOMPUTERS

Fig. 18 Interrupt control

Fig. 19 Structure of interrupt-related registers

Interrupt request bit

Interrupt enable bit

Interrupt disable flag (I)

BRK instruction

Reset

Interrupt request

b7 b0

Interrupt edge selection register

INT

0

interrupt edge selection bit

INT

1

interrupt edge selection bit

INT

2

interrupt edge selection bit

INT

3

interrupt edge selection bit

Not used (return “0” when read)

(INTEDGE : address 003A

16

)

Interrupt request register 1

INT

0

interrupt request bit

INT

1

interrupt request bit

Serial I/O receive interrupt request bit

Serial I/O transmit interrupt request bit

Timer X interrupt request bit

Timer Y interrupt request bit

Timer 2 interrupt request bit

Timer 3 interrupt request bit

Interrupt control register 1

INT

0

interrupt enable bit

INT

1

interrupt enable bit

Serial I/O receive interrupt enable bit

Serial I/O transmit interrupt enable bit

Timer X interrupt enable bit

Timer Y interrupt enable bit

Timer 2 interrupt enable bit

Timer 3 interrupt enable bit

0 : No interrupt request issued

1 : Interrupt request issued

(IREQ1 : address 003C

16

)

(ICON1 : address 003E

16

)

Interrupt request register 2

CNTR

0

interrupt request bit

CNTR

1

interrupt request bit

Timer 1 interrupt request bit

INT

2

interrupt request bit

INT

3

interrupt request bit

Key input interrupt request bit

ADT/AD conversion interrupt request bit

Not used (returns “0” when read)

(IREQ2 : address 003D

16

)

Interrupt control register 2

CNTR

0

interrupt enable bit

CNTR

1

interrupt enable bit

Timer 1 interrupt enable bit

INT

2

interrupt enable bit

INT

3

interrupt enable bit

Key input interrupt enable bit

ADT/AD conversion interrupt enable bit

Not used (returns “0” when read)

(Do not write “1” to this bit.)

0 : Interrupts disabled

1 : Interrupts enabled

(ICON2 : address 003F

16

)

0 : Falling edge active

1 : Rising edge active

b7 b0

b7 b0

b7 b0

b7 b0

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