msm9831 Oki Semiconductor, msm9831 Datasheet - Page 10

• Manufacturer Part Number: msm9831
• Description: Voice Synthesis Lsi With On-chip 384kbit Mask Rom
• Manufacturer: Oki Semiconductor

FUNCTIONAL DESCRIPTION
Sampling Frequency
Sampling Frequency can be selected and setup on each phrase address. 7 sampling frequencies are available for
user's choice in preparing Voice Data File at the pre-production stage. Select sampling frequencies to satisfy f
= 3.9 to 28.0 kHz obtained by frequency dividing ratios in Table 1.
Recording/Playback Time
Figure 1 below shows memory allocation of on-chip 384K bit Mask ROM.
The Mask ROM is partitioned into 4 data areas: user's Area, Phrase Control Table Area, Phrase Control Area and
Test Data Area. Actual memory space is the total Mask ROM capacity (384K bit) indicated in this document
minus 6K bit.
1 Semiconductor
Figure 1 Memory Allocation of on-chip Mask ROM (384K bit)
Sampling Frequency
(f
OSC
Phrase Control Table Area
Phrase Data Control Area
Test Data Area
User's Area
10.6 kHz
12.8 kHz
16.0 kHz
=4.096 MHz)
4.0 kHz
5.3 kHz
6.4 kHz
8.0 kHz
Table 1 Sampling Frequency
Frequency diving ratio
f
OSC
f
f
f
f
f
f
OSC
OSC
OSC
OSC
OSC
OSC
2K bit
2K bit
2K bit
378K bit
/1024
/768
/640
/512
/384
/320
/256
MSM9831-xxx
FEDL9831-02
10/23
SAM