GENERAL DESCRIPTION

The ML2250 family is a 2-channel mixing speech synthesis device with an on-chip voice data (i.e., phrases) storing mask ROM and a flash memory. Besides playing the built-in voice data, this device can output voice data that is input from outside the device. This ML2250 family allows selecting the playback method from the 8-bit PCM, non-linear 8-bit PCM, 16-bit PCM, 2-bit ADPCM2, and 4-bit ADPCM2 algorithms. Andthe sound volume is adjustable as well.

FEATURES

Non-linear 8-bit PCM, 8-bit PCM, 16-bit PCM, 2-bit ADPCM2, and 4-bit ADPCM2 algorithms

Serial input/parallel input selectable

Phrase controltablefunctioni.e., user definable phrase control table function

2 channels mixingfunction

Master clock frequency: 4.096 MHz

Sampling frequency: 4.0 kHz, 5.3 kHz, 6.0kHz, 6.4 kHz, 8.0 kHz, 10.7 kHz, 12.0kHz, 12.8 kHz, 16.0 kHz, 21.3 kHz, 24.0kHz, 25.6 kHz, 32.0 kHz, 42.7 kHz, 48 kHz

Maximum number of phrases: 256 phrases

Sound volume adjustment function built in(2 soundsindependently adjustable in 29 steps)

External voice data can be input

14-bit D/A converter built in

Built-in low-pass filter: Digital filter

Package: 44-pin plastic QFP (QFP44-P-910-0.80-2K)

(ML2251-XXXGA/ ML2252-XXXGA/ ML2253-XXXGA/

ML2254-XXXGA /ML2256-XXXGA / ML22Q54GA/ML22Q58GA)

33-pin W-CSP (P-VFLGA33-5.03X5.78-0.80-W)

(ML2253-XXXHB/ ML2254-XXXHB)

(ML2256-XXXHB)