MSM9811GA View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
Manufacturer
MSM9811GA Datasheet PDF : 44 Pages
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OKI Semiconductor
FEDL9811FULL-04
MSM9811
START Command
The START command starts voice synthesis of the channel corresponding to the data stored in the TMP register.
Table 1 shows the correspondence between data input (D7-D0) and channels. In the case of serial input, all 8 bits of
D7 to D0 should be input serially from MSB.
Table 1 Correspondence between D7-D0 and Channels
Data bus
Corresponding channel
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
CH4 CH3 CH2 CH1
When the START command is input, data stored in the TMP register is set at the start register, and voice synthesis
processing starts. For example, when all “1’s” are written from the data bus to the TMP register and the START
command is input, all channels start voice synthesis simultaneously.
Input the START command when the status signal (NCR or BUSY) of the channel to be started is at “H”. When
NCR is “L”, input is disabled. When the phrase control table is used, input the START command while BUSY is
“H”. Otherwise, the LSI may malfunction.
Figure 4 shows the flowchart when the START command is input.
RD pulse input
No
NCRn=“H”
Yes
Subcommand input
START command input
NCRn corresponding to each channel is output to D7-D0
Check that D7-D0 corresponding to the channel
to start voice synthesis is “H”.
(BUSYn is “H” when the phrase control table is used.)
After setting “L” to D7-D0 corresponding to the channel to start
voice synthesis from the data bus, input the WR pulse. (Set
CMD to “H”.)
Figure 4 START Command Input Flow
STOP Command
The STOP command stops voice synthesis processing of the channel corresponding to data stored in the TMP
register. Table 2 shows the correspondence between data input (D7-D0) and channels.
Table 2 Correspondence between D7-D0 and channels
Data bus
Corresponding channel
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
CH4 CH3 CH2 CH1
When the STOP command is input, the LSI stops processing of voice synthesis of the corresponding channel at the
rise of the WR pulse. When voice synthesis stops, the PCM value of that channel is cleared to 1/2 VDD, and the
NCR and BUSY channel status signals become “H”.
When “H” has been set at the START register, the START register is cleared to “L”.
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