FEDL2280XFULL-04

ML22808/ML22804/Ml22802-XXX

5.

PLAY command

0

1

0

0

⎯

⎯

⎯

⎯

• command

F7

F6

F5

F4

F3

F2

F1

F0

1st byte

2nd byte

The PLAY command is a 2-byte command.

Set the playback phrase using the second byte of this command.

The PLAY command can be input when the NCR signal is at a “H” level.

Since it is possible to specify the playback phrase (F7 to F0) at the time of creating the ROM that stores voice

data, set the phrase that was set when the ROM was created.

Figure below shows the timing of phrase (F7 to F0 = 01H) playback.

CS

Status

Playing

SCK

DI

NCR

BUSY

AOUT

1V

PLAY command

1

PLAY command

2

Awaiting command

Command is being processed

Awaiting command

Address is being

controlled

Awaiting command

When the 1

input after the elapse of the command processing time.

When the 2

elapse of the 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 ends automatically.

The NCR1 signal is at a “L” level during address control, and goes “H” when the address control is finished and

playback is started.

When this NCR signal goes “H”, then it is possible to input the PLAY command for the

next playback phrase.

During address control, the

BUSY 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

BUSY signal.

Time Required for Address Control

The time required for controlling the address of the playback phrase after input of the PLAY command is the

time of 16 to 17 periods of the sampling frequency of the the phrase that was played last.

After power is turned

on or after

RESET is input, it is the time of 16 to 17 periods of 4 kHz sampling frequency.

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