22

µPD780921, 780922, 780923, 780924

6. INTERRUPT FUNCTIONS

There are 18 interrupt functions of three different kinds as shown below.

• Non-maskable interrupt

:

1

• Maskable interrupts

: 16

• Software interrupt

:

1

Default

Interrupt Source

Internal/

Vector Table

Basic

Interrupt Type

Priority Note 1

Name

Trigger

External

Address

Configuratin

Type Note 2

Non-maskable

—

INTWDT

Watchdog timer overflow

Internal

0004H

(A)

(when non-maskable interrupt is selected)

Maskable

0

INTWDT Watchdog timer overflow

(B)

(when interval timer is selected)

1

INTP0

Pin input edge detection

External

0006H

(C)

2

INTP1

0008H

3

INTP2

000AH

4

INTP3

000CH

5

INTTM7

TM7 under flow

Internal

000EH

(B)

6

INTSER0 UART00 receive error generation

0010H

7

INTSR0

UART00 receive termination

0012H

8

INTST0

UART00 transmit termination

0014H

9

INTSER1 UART01 receive error generation

0016H

10

INTSR1

UART01 receive termination

0018H

11

INTST1

UART01 transmit termination

001AH

12

INTTM50 TM50 and CR50 match signal generation

001CH

13

INTTM51 TM51 and CR51 match signal generation

001EH

14

INTTM52 TM52 and CR52 match signal generation

0020H

15

INTAD0

A/D conversion termination

0022H

Software

—

BRK

BRK instruction execution

—

003EH

(D)

Table 6-1. Interrupt Source List

Notes 1. The default priority is the priority applicable when more than one maskable interrupt is generated. 0 is the highest

priority and 15, the lowest.

2. Basic configuration types (A) to (D) correspond to (A) to (D) on the next page.