3819 datasheet(79/218 Pages) RENESAS

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3819 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

FFFD16

FFFB16

FFF916

FFF716

FFF516

FFF316

FFF116

FFEF16

FFED16

FFEB16

FFE916

FFE716

FFE516

FFE316

FFE116

FFDF16

FFDD16

Priority

Remarks

Non-maskable

External interrupt

(active edge selectable)

External interrupt

(active edge selectable)

External interrupt

(active edge selectable)

Valid when interrupt interval determination

operates

Valid when serial I/O ordinary mode is

selected

Valid when serial I/O automatic transfer

mode is selected

Valid when serial I/O 2 is selected

Valid when serial I/O 3 is selected

STP release timer underflow

External interrupt

(active edge selectable)

Valid when INT4 interrupt is selected

External interrupt

(active edge selectable)

Valid when A-D converter interrupt is selected

Valid when FLD blanking interrupt is

selected

Valid when FLD digit interrupt is selected

Non-maskable software interrupt

Functional description supplement

Interrupt

3819 group permits interrupts on the basis of 20 sources. It is vector interrupts with a fixed priority system. Accordingly,

when two or more interrupt requests occur during the same sampling, the higher-priority interrupt is accepted first. This

priority is determined by hardware, but variety of priority processing can be performed by software, using an interrupt

enable bit and an interrupt disable flag.

For interrupt sources, vector addresses and interrupt priority, refer to “Table 5.”

Table 5. Interrupt sources, vector addresses and interrupt priority

FFFC16

FFFA16

FFF816

FFF616

FFF416

FFF216

FFF016

FFEE16

FFEC16

FFEA16

FFE816

FFE616

FFE416

FFE216

FFE016

FFDE16

FFDC16

Interrupt sources

Reset (Note)

INT0 interrupt

INT1/ZCR interrupt

INT2 interrupt

Remote control/counter overflow

interrupt

Serial I/O 1 interrupt

Serial I/O 1 automatic transfer interrupt

Serial I/O 2 interrupt

Serial I/O 3 interrupt

Timer 1 interrupt

Timer 2 interrupt

Timer 3 interrupt

Timer 4 interrupt

Timer 5 interrupt

Timer 6 interrupt

INT3 interrupt

INT4 interrupt

A-D conversion interrupt

FLD blanking interrupt

FLD digit interrupt

BRK instruction interrupt

High-order Low-order

Vector addresses

Note : Reset functions in the same way as an interrupt with the highest priority.

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