msm9810 Oki Semiconductor, msm9810 Datasheet - Page 25

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

¡ Semiconductor
voltage follower. To change this setting, use the OPT command.
length of silence is according to the size of data stored in the TMP register.
length can be set for 255 steps, 4 ms to 1020 ms, in 4 ms intervals. Silence time can be set as follows.
¥ 4.096 ms
When the MUON command is input, “H” is set to the START register, and NCR and BUSY signals
becomes “L”.
voice synthesis ends.
synthesis is at “H”. When NCR is “L”, input is disabled.
3) Analog Output
When power is turned on, it has been set that the output of the D/A converter is output via the
The output impedance of analog signals being output via the voltage follower is about 500W.
The output impedance of analog signals directly output from the D/A converter is about 30kW.
9-5 MUON Command
The MUON command inserts silence into the specified channel at the rise of the WR pulse. The
The length of silence data is input in advance, before executing the MUON command. Silence
t
The operation of the MUON command is similar to the START command to start voice synthesis.
If the MUON command is input when voice synthesis is in execution, silence time is inserted after
Input the MUON command when the status signal (NCR or BUSY) of the channel to start voice
Figure 9-3 shows a flow chart example when the MUON command is input.
mu
= (2
7
¥ (D7) + 2
MUON command input
Subcommand input
6
RD pulse input
¥ (D6) + 2
NCRn="H"
Figure 9-3 MUON Command Input Flow
YES
5
¥ (D5) + 2
NO
4
¥ (D4) + 2
NCRn corresponding to each channel
is output to D7-D0.
Check that D7-D0 corresponding to the
channel to insert silence is "H".
After setting time of inserting silence from
the data bus, input WR pulse (set CMD to "H").
Specify channel by silence command.
3
¥ (D3) + 2
2
¥ (D2) + 2
1
¥ (D1) + 2
MSM9810
0
¥ (D0)
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