msm9810b Oki Semiconductor, msm9810b Datasheet - Page 31

• Manufacturer Part Number: msm9810b
• Description: 8-channel Mixing Oki Adpcm Type Voice Synthesis Lsi
• Manufacturer: Oki Semiconductor

LOOP Command
The LOOP command repeats a playback of voice synthesis of the channel corresponding to data stored in the TMP
registers. Table 3 shows the correspondence between data input (D7-D0) and channels.
When the LOOP command is input, the LSI writes data of the TMP register to the LOOP register at rise of WR
pulse, and repeats a playback of the channel where “H” is set. Once “H” is set at the LOOP register, playback
continues until “L” is set from the outside. If the phrase control table function has been used for a phrase address,
the edited voice is repeatedly played back.
To end a repeating playback, set the register of the channel to end the repeat to “L” using the LOOP command
again. When the register is set to “L”, repeating ends with the phrase next to the current playback phrase. If the
START register has been set to continue the playback of another phrase, another phrase is played back
continuously after repeating ends.
Figure 5 shows an example.
OKI Semiconductor
Data bus
Corresponding channel
Channel 1
Table 3 Correspondence between D7-D0 and Channels
Phrase 1
start
Figure 5 LOOP Command Execution Example
LOOP start
Phrase 1
CH8
D7
CH7
D6
Phrase 1
CH6
D5
LOOP end
Phrase 1
CH5
D4
Phrase 2
Phrase 1
CH4
D3
start
CH3
D2
Phrase 2
FEDL9810BFULL-03
CH2
D1
MSM9810B
CH1
D0
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