FEDL2250DIGEST-09
OKI Semiconductor
ML2250 family
Table below summarizes the points of difference between the ML2250 family and currently manufactured
products with a ROM built in.
ML2250 family
Interface
Parallel or serial
2-bit ADPCM2
4-bit ADPCM2
8-bit PCM
8-bit non-linear PCM
16-bit PCM
256
MSM6650 family
MSM9800 family
Parallel, serial or Parallel or
stand-alone
stand-alone
4-bit ADPCM
8-bit PCM
ML2210 family
Serial
Playback method
4-bit ADPCM
8-bit PCM
8-bit PCM
8-bit non-linear PCM
8-bit non-linear PCM
63
4.0/5.3/6.4/8.0/10.7/
12.8/16.0
256 kHz (CR
oscillation)
4.096 MHz (XT)
Current type: 10 bits
Primary comb filter
1 channel
Can edit 8 phrases
Set at VREF.
None
Available
247
4.0/5.3/6.4/8.0/10.7/
12.8/16.0
Max. number of
phrases
127
4.0/5.3/6.4/8.0/
10.7/12.8/16.0/
32.0
4.0/5.3/6.0/6.4/8.0/10.7
Sampling frequency /12.0/12.8/16.0/21.3/
(kHz)
24.0/25.6/32.0/42.7/
48.0
Clock frequency
D/A converter
Low-pass filter
Number of channels
Phrase control table
Volume adjustment
Repeat function
STOP
Seam silence
interval in
continuous playback
Others
256 kHz (CR
4.096 MHz
oscillation)
4.096 MHz (XT)
Voltage type: 12
Voltage type: 14 bits
bits
FIR type interpolation
Secondary comb
filter
filter
2 channels
2 channels
Both 2 channels without Can edit 8
user definable phrase
phrases (1
restrictions
channel only)
29 steps
4 steps
(–2 dB/–5 dB steps)
(–6 dB steps)
No limit
4 types
Each channel
Simultaneous
independent
channels 1 and 2
0 (Note)
External data input
possible
4.096 MHz
Current type: 12 bits
Secondary comb
filter
1 channel
None
Set at VREF.
None
Available
4 sampling cycles
—
4 sampling cycles 3 sampling cycles
—
—
Note: Continuous playback shown in the figure below is possible.
1 phrase
1 phrase
1 phrase
1 phrase
Conventional
ML2250 family
Silence interval
No silence interval
2/36
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