ML22Q563 datasheet(38/66 Pages) ETC2

38 / 66 page

FEDL2257X-05

ML22Q573/ML2257X

7. PLAY command

command

1st byte

2nd byte

The PLAY command is used to start playback with phrase specified.

This command can be input when the

NCR signal on the target channel is at a “H” level.

Since it is possible to specify a playback phrase (F9–F0) at the time of creating a ROM that stores voice data,

specify the phrase that was specified when the ROM was created.

The figure below shows the timing of phrase (F9–F0 = 01H) playback.

CSB

SCK

NCR

BUSYB

SPM

1/2VDD

SPP

1/2VDD

CBUSYB

(internal)

PLAY command

1st byte

PLAY command

2nd byte

Status

Command is being processed

Playing

Awaiting command

Address is being

controlled

Awaiting command

When the 1

st byte of the PLAY command is input, the device enters a state awaiting input of the 2nd byte of the

PLAY command after a lapse of command processing time.

When the 2

nd byte of PLAY command is input,

after a lapse of command processing time, the device starts reading from the ROM the address information of the

phrase to be played.

Thereafter, playback operation starts, the playback is performed up to the specified ROM

address, and then the playback terminates automatically.

The NCR signal is at a “L” level during address control, and goes “H” when the address control is finished and

playback starts.

When the NCR signal on the target channel goes “H”, it is possible to input the PLAY

command for the next playback phrase.

During address control, the BUSYB signal is at a “L” level during playback and goes “H” when playback is

finished.

Whether the playback is going on can be known by the BUSYB signal.

Channel settings

Channel

Channel 0

Channel 1

Channel 2

Channel 3

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