FEDL2250DIGEST-09

OKI Semiconductor

ML2250 family

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Table below summarizes the points of difference between the ML2250 family and currently manufactured

products with a ROM built in.

ML2250 family

MSM6650 family

MSM9800 family

ML2210 family

Interface

Parallel or serial

Parallel, serial or

stand-alone

Parallel or

stand-alone

Serial

Playback method

2-bit ADPCM2

4-bit ADPCM2

8-bit PCM

8-bit non-linear PCM

16-bit PCM

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

Max. number of

phrases

256

127

63

247

Sampling frequency

(kHz)

4.0/5.3/6.0/6.4/8.0/10.7

/12.0/12.8/16.0/21.3/

24.0/25.6/32.0/42.7/

48.0

4.0/5.3/6.4/8.0/

10.7/12.8/16.0/

32.0

4.0/5.3/6.4/8.0/10.7/

12.8/16.0

4.0/5.3/6.4/8.0/10.7/

12.8/16.0

Clock frequency

4.096 MHz

256 kHz (CR

oscillation)

4.096 MHz (XT)

256 kHz (CR

oscillation)

4.096 MHz (XT)

4.096 MHz

D/A converter

Voltage type: 14 bits

Voltage type: 12

bits

Current type: 10 bits

Current type: 12 bits

Low-pass filter

FIR type interpolation

filter

Secondary comb

filter

Primary comb filter

Secondary comb

filter

Number of channels

2 channels

2 channels

1 channel

1 channel

Phrase control table

Both 2 channels without

user definable phrase

restrictions

Can edit 8

phrases (1

channel only)

Can edit 8 phrases

None

Volume adjustment

29 steps

(

–2 dB/–5 dB steps)

4 steps

(

–6 dB steps)

Set at VREF.

Set at VREF.

Repeat function

No limit

4 types

None

None

STOP

Each channel

independent

Simultaneous

channels 1 and 2

Available

Available

Seam silence

interval in

continuous playback

0 (Note)

4 sampling cycles

3 sampling cycles

4 sampling cycles

Others

External data input

possible

—

—

—

Note: Continuous playback shown in the figure below is possible.

1 phrase

1 phrase

1 phrase

1 phrase

ML2250 family

Conventional

Silence interval

No silence interval