ml2215 Oki Semiconductor, ml2215 Datasheet - Page 14

• Manufacturer Part Number: ml2215
• Description: Speech Synthesizer Plus Music Lsi With On-chip 3 Mbit Mask Rom
• Manufacturer: Oki Semiconductor

5. External Clock Input
Mask option allows a user to choose an external clock frequency, as shown in Table 5.1.
When an external clock frequency were chosen as Mask option and a different frequency input were made, the
sampling frequency changes in proportion to the actual input frequency. For example, while 4.096 MHz external
clock frequency option was selected as Mask option, and when 6.144 MHz external clock is actually input, then
the sampling frequency changes accordingly, e.g. sampling frequency at 1.5 times of those shown in Table 5.1.
6. Stop Code
The Stop code input (Table 1.1) to the SD pin during playback let the LSI stop playback on the SI’s falling edge
following to the LSB input, and the AOUT fall down to 1/2 V
stops as well.
Timings for the Stop code input are shown below, for 2-pin interfacing in Figure 6.1 and for 3-pin interfacing in
Figure 6.2 respectively.
1 Semiconductor
External Clock Frequency
16.384 MHz
4.096 MHz
8.192 MHz
Table 5.1 External Clock Frequency and Sampling Frequency
Figure 6.1 Timing for Stop Code Input - 2-pin Interfacing
Figure 6.2 Timing for Stop Code Input - 3-pin Interfacing
BUSY
BUSY
SD
SI
SD
ST
SI
4.0 kHz, 5.3 kHz, 6.4 kHz, 8.0 kHz, 10.7 kHz, 12.8 kHz, 16.0 kHz
4.0 kHz, 5.3 kHz, 6.4 kHz, 8.0 kHz, 10.7 kHz, 12.8 kHz, 16.0 kHz
4.0 kHz, 5.3 kHz, 6.4 kHz, 8.0 kHz, 10.7 kHz, 12.8 kHz, 16.0 kHz
Internal Sampling Frequency
DD
level. If the LSI playbacks a music phrase, music
STOP
STOP
FEDL2215-01
ML2215
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