FEDL2250DIGEST-01
OKI Semiconductor
ML2252/54-XXX, ML22Q54
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
Playback method
8-bit PCM
8-bit non-linear PCM
16-bit PCM
Max. number of
phrases
Sampling frequency
(kHz)
256
4.0/5.3/6.4/8.0/10.7/
12.8/16.0/21.3/25.6/
32.0/42.7/48.0
4.096 MHz
1-bit DAC PWM
Voltage type: 14 bits
FIR type
interpolation filter
2 channels
Both 2 channels
without user
definable phrase
restrictions
29 steps
(–2 dB/–5 dB steps)
No limit
Each channel
independent
0 (Note)
External data input
possible
127
4.0/5.3/6.4/8.0/10.7/
12.8/16.0/32.0
256 kHz (CR
oscillation)
4.096 MHz (XT)
D/A converter
Low-pass filter
Number of channels
Voltage type: 12 bits
Secondary comb
filter
2 channels
Can edit 8 phrases
(1 channel only)
4 steps
(–6 dB steps)
4 types
Simultaneous
channels 1 and 2
4 sampling cycles
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
Current type: 12 bits
Secondary comb
filter
1 channel
247
4.0/5.3/6.4/8.0/10.7/
12.8/16.0
4-bit ADPCM
8-bit PCM
8-bit PCM
8-bit non-linear PCM
4-bit ADPCM
8-bit PCM
8-bit non-linear PCM
MSM6650 family
Parallel, serial or
stand-alone
MSM9800 family
Parallel or
stand-alone
ML2210 family
Serial
Clock frequency
4.096 MHz
Phrase control table
Can edit 8 phrases
None
Volume adjustment
Repeat function
STOP
Seam silence
interval in
continuous playback
Others
Set at VREF.
None
Available
Set at VREF.
None
Available
3 sampling cycles
4 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
2/31
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