MSM9811GA View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

Manufacturer

MSM9811GA

4-Channel Mixing OKI ADPCM Type Voice Synthesis LSI

Oki Electric Industry 

OKI Semiconductor

FEDL9811FULL-04

MSM9811

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.

Table 3 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 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.

Channel 1

Phrase 1 Phrase 1 Phrase 1 Phrase 1 Phrase 2

Phrase 1 LOOP start

start

LOOP end Phrase 2

start

Figure 5 LOOP Command Execution Example

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