msm9810 Oki Semiconductor, msm9810 Datasheet - Page 23

• Manufacturer Part Number: msm9810
• Description: 8-channel Mixing Oki Adpcm Type Voice Synthesis Lsi
• Manufacturer: Oki Semiconductor

¡ Semiconductor
channel at the rise of the WR pulse. When voice synthesis stops, the PCM value of that channel
is cleared to 1/2 V
stored in the TMP registers. Table 9-6 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 controll 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 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 9-2 shows an example.
When the STOP command is input, the LSI stops processing of voice synthesis of the corresponding
When “H” has been set at the START register, the START register is cleared to “L”.
9-3
The LOOP command repeats a playback of voice synthesis of the channel corresponding to data
LOOP Command
Table 9-6 Correspondence between D7-D0 and channels
Channel 1
Data bus
Corresponding channel
DD
Figure 9-2 LOOP Command Execution Example
, and the NCR and BUSY channel status signals become “H”.
LOOP start
1 phrase
CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1
D7
D6
1 phrase
D5
LOOP end
D4
1 phrase
D3
D2
2 phrase
D1
D0
MSM9810
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