ml2216 Oki Semiconductor, ml2216 Datasheet - Page 30

• Manufacturer Part Number: ml2216
• Description: Oki Adpcm2 Algorithm-based Speech Synthesis Lsi
• Manufacturer: Oki Semiconductor

5. PLAY Command
PLAY command is a 2-byte command. The command first sets the playback command, and next sets the playback
phrase. PLAY command should be input during the NCR signal of the playback is on the “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,
please set the phrase that was set when the ROM was created.
Figure below shows the timing of phrase (F7 to F0 = 01H) playback.
When the 1
after the elapse of the command processing time. When the 2
of the command processing time, the device starts reading from the address information ROM of phrase for
playback. Thereafter, the playback operation starts, the playback is performed up to the specified ROM address, and
then the playback ends automatically.
NCR signal remains “L” level during the address control, and returns to “H” level when the address control is
finished and the playback starts. When this NCR signal goes “H” level, then it is possible to input the PLAY
command of the next playback phrase.
BUSY signal remains “L” level during the address control and while playback is going on, and returns to “H” level
when the playback is finished. Whether the playback is going on can be known by the BUSY signal.
Address Management Time
The time required for managing the address of the playback phrase after the PLAY command is input depends on the
lowest sampling frequency that was used to playback the previous phrase. It is the time of 16 or 17 cycle of a
sampling frequency. After power is turned on or after RESET is input, a sampling frequency of 4 kHz is used.
OKI Semiconductor
• command
st
status
byte of the PLAY command is input, the device enters a state in which it waits for the 2
AOUT
BUSY
NCR
SPM
SCK
SPP
Processing command
CS
DI
F7
0
PLAY command
Command
1V
1/2VDD
1/2VDD
standby
F6
1
1
st
byte
F5
0
Command
PLAY command
F4
0
standby
2
nd
byte
F3
−
Processing
F2
address
−
nd
byte of PLAY command is input then, after an elapse
F1
−
F0
−
Playback
1 byte
2 bytes
Command
standby
ML2216/ML22P16
FEDL2216FULL-03
nd
byte to input
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