7477 datasheet(14/48 Pages) RENESAS

14 / 48 page

MITSUBISHI MICROCOMPUTERS

7477/ 7478 GROUP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Fig. 5 Interrupt control

Fig. 4 Structure of registers related to interrupt

Interrupt request bit

Interrupt enable bit

Interrupt disable flag I

BRK instruction

Reset

Interrupt request

Edge polarity selection register (EG)

(Address 00D416)

INT0 edge selection bit

INT1 edge selection bit

CNTR0 edge selection bit

CNTR1 edge selection bit

0 : Falling edge

1 : Rising edge

CNTR0/CNTR1 interrupt selection bit

0 : CNTR0

1 : CNTR1

INT1 source selection bit (at power-down state)

0 : P31/INT1

1 : P00 – P07 “L” level (for key-on wake-up)

Nothing is allocated (The value is undefined at reading)

Interrupt request register 1

(Address 00FC16)

Timer 1 interrupt request bit

Timer 2 interrupt request bit

Timer 3 interrupt request bit

Timer 4 interrupt request bit

Nothing is allocated

(The value is undefined at reading)

Serial I/O receive interrupt request bit

Serial I/O transmit interrupt request bit

A-D conversion completion interrupt request bit

Interrupt control register 1

(Address 00FE16)

Timer 1 interrupt enable bit

Timer 2 interrupt enable bit

Timer 3 interrupt enable bit

Timer 4 interrupt enable bit

Nothing is allocated

(The value is undefined at reading)

Serial I/O receive interrupt enable bit

Serial I/O transmit interrupt enable bit

A-D conversion completion interrupt enable bit

Interrupt request register 2

(Address 00FD16)

INT0 interrupt request bit

INT1 interrupt request bit

Nothing is allocated

(The value is undefined at reading)

CNTR0 or CNTR1 interrupt request bit

0 : No interrupt request

1 : Interrupt requested

Interrupt control register 2

(Address 00FF16)

INT0 interrupt enable bit

INT1 interrupt enable bit

Nothing is allocated

(The value is undefined at reading)

CNTR0 or CNTR1 interrupt enable bit

0 : Interrupt disable

1 : Interrupt enabled

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