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MSM9836-XXX

Voice Synthesis IC with Built-in Mask ROM

Oki Electric Industry 

¡ Semiconductor

MSM9836-xxx

1. Sampling Frequency

As shown in Table 1.1, 7 sampling frequencies are available.

A sampling frequency can be selected and assigned to each phrase in ROM data.

Table 1.1 Sampling Frequency

Sampling Frequency

At standard

oscillation frequency

4.0 kHz

5.3 kHz

6.4 kHz

8.0 kHz

10.6 kHz

12.8 kHz

16.0 kHz

Frequency diving ratio

fOSC1/1024

fOSC1/768

fOSC1/640

fOSC1/512

fOSC1/384

fOSC1/320

fOSC1/256

2. Recording/Playback Time

Figure 2.1 below shows memory allocation of the on-chip Mask ROM. About 17 Kbits of data area

is allocated for the Phrase Control Table, Phrase Data Control and Test Data.

Therefore, actual data area for storing sound data equals the total Mask ROM capacity minus 17

Kbits.

Phrase Control Table Area 8K bit

Pharase Data Control Area

Test Data Area

8K bit

1K bit

On-chip Mask ROM Capacity

3072K bit

User's Area

3055K bit

Figure 2.1 Memory Allocation of On-chip Mask ROM

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