Specifications

II-58 EPSON S1C62N82 TECHNICAL SOFTWARE

CHAPTER 3: PERIPHERAL CIRCUITS (Melody Generator)

(1) One shot

In this mode, only one melody is played.

The control procedure is as follow:

Play mode

Set melody address

Set MELD bit to "0"

Set MELC bit to "0"

Set melody interrupt

mask enable

Jump to

melody subroutine

Melody end

interrupt

10AH

Melody subroutine

Read interrupt flag

to clear

RET

Set MELC bit to "1"

Fig. 3.11.2

Control procedure of

one shot mode

When the MELC bit is set to "1", it makes the melody

play. The user's program should set this bit to "0" before

the end bit from the melody ROM. If not, the function will

be like the level hold mode (see next function).

MELC

MO Playing

Interrupt generate by END data setting