FEDL2500BFULL-02
OKI Semiconductor
ML2500BTA
2. Control Commands-Playback
The following section describes commands used to control playback:
2.1. PLAY Command (2XH)
By using the first 4 bits of this command, you can initiate playback, starting at the specified Start Address and
playback lasts up to the specified Stop Address. When the specified Stop Address is reached, playback
automatically stops.
4-bit data preceded is to define a sampling frequency, same as with the REC command. When the sampling
frequency is not defined with this command, playback is made last defined sampling frequency.
When reset and powered up, playback is made at 6.4 kHz (default) sampling frequency.
You can specify the Start and Stop Addresses for a playback session by using the STADR and SPADR commands.
See 2.4 and 2.5 for further details on the STADR and SPADR commands. When the Start Address and the Stop
Address are not defined by STADR and SPADR commands, playback is taken place by using the Start and Stop
Addresses defined for the last playback session.
2.2. STOP Command (3H)
You can stop playback by using this command. The data following to this command is disregarded.
2.3. PAUSE Command (4H)
You can temporarily suspend playback by using this command. The data following to this command is
disregarded.
Re-inputting this command resumes the suspended operation. If the STOP command is input while playback is
suspended by the PAUSE command, the LSI stops playback.
2.4. STADR Command (5H)
You can specify the Start Address for playback with 13-bit data preceded by this command.
You need to run STADR command before you can use the PLAY command.
When this command is not executed prior to the PLAY command input, playback starts at the last defined Start
Address. After resetting or power-on, the Start Address is set to the memory’s starting address as default.
2.5. SPADR Command (6H)
You can specify the Stop Address for playback with 13-bit data preceded by this command.
You need to run the SPADR command before you can use the PLAY command.
When this command is not executed prior to the PLAY command input, playback ends at the last defined Stop
Address. After resetting or power-on, the Stop Address is set to the memory’s last address as default.
2.6. RDADR Command (7H)
By using this command you can read the address pointed by the current Memory Address Counter via serial
interface. In synchronization with SCK signal following to the RDADR command, 13-bit Memory Address
Counter’s value, starting with the MSB, is output to the DO pin. The DO pin’s output falls down to “L” level after
13th bit. This command can be input during playback and playback pausing.
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