7477 datasheet(77/354 Pages) RENESAS

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HARDWARE

1.11 Interrupts

7470/7471/7477/7478 GROUP USER’S MANUAL

1-60

(2) Interrupt request register 1 (IR1: Address 00FC16)

Interrupt request register 2 (IR2: Address 00FD16)

The Interrupt request register 1 and the Interrupt request register 2 consist of bits that indicate

whether an interrupt request exists or not.

Figure 1.11.9 shows a structure of the Interrupt request register 1 and Figure 1.11.10 shows a

structure of the Interrupt request register 2.

Fig. 1.11.9 Structure of Interrupt request register 1

Fig. 1.11.10 Structure of Interrupt request register 2

b7 b6 b5 b4 b3 b2 b1 b0

Interrupt request register 1 (IR1) [Address

Name

Function

At reset RW

Interrupt request register 1

0 : No interrupt request

1 : Interrupt requested

Timer 1 interrupt

request bit

Timer 2 interrupt

request bit

Timer 3 interrupt

request bit

Timer 4 interrupt

request bit

Serial I/O receive interrupt

request bit

(7477/7478 group)(Note)

0 : No interrupt request

1 : Interrupt requested

0 : No interrupt request

1 : Interrupt requested

0 : No interrupt request

1 : Interrupt requested

0 : No interrupt request

1 : Interrupt requested

Nothing is allocated for this bit. This is write

disabled bit and is undefined at reading.

Note:

A-D conversion completion

interrupt request bit

0 : No interrupt request

1 : Interrupt requested

0 : No interrupt request

1 : Interrupt requested

Serial I/O transmit

interrupt request bit

(7477/7478 group)

In the 7470/7471group, nothing is allocated for bit 5. This is write

disabled bit and is undefined at reading.

“0” is set by software, but not “1.”

Serial I/O interrupt request

bit (7470/7471group)

00FC16]

b7 b6 b5 b4 b3 b2 b1 b0

Interrupt request register 2 (IR2) [Address

Name

Function

At reset RW

Interrupt request register 2

0 : No interrupt request

1 : Interrupt requested

INT0 interrupt request

bit

INT1 interrupt request

bit

CNTR0 or CNTR1

interrupt request bit

0 : No interrupt request

1 : Interrupt requested

0 : No interrupt request

1 : Interrupt requested

Nothing is allocated for these bits. There are write

disabled bits and are undefined at reading.

“0” is set by software, but not “1.”

00FD16]

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