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ML22Q573/ML2257x series

4-Channel Mixing Speech Synthesis LSI with Built-in Flash/Mask ROM for Automotive

チップ写真 The ML22Q573/ML2257x series is a high-quality speech synthesis LSI with built-in Mask ROM/Flash memory suitable for automotive applications. The LSI, which includes a high-quality (HQ-ADPCM) decoder, a 16-bit DAC, a low-pass filter, and a monaural speaker amplifier, incorporates the peripheral components necessary for speech and sound output in a single chip. The LSI contains a variety of functions including 4-channel simultaneous playback, volume control and edit ROM function for efficient memory usage.

Built-in high-quality decoder (HQ-ADPCM)
Built-in speaker amplifier (1.0W/5V using 8Ω speaker)
Built-in external analog mixing function
Power-supply-voltage detection
Development is supported with an evaluation board and an exclusive programmer for ML22Q573
4-channel mixing function enabling simultaneous playback
CPU I/F: Clock synchronous serial interface

Parameter	Specification
Part number	ML22Q573/ML2257x series datasheet[pdf]
Speech synthesis method	HQ-ADPCM 8-bit nonlinear PCM 8-bit PCM, 16-bit PCM (Can be specified for each phrase)
Sampling frequency Fosc=4.096MHz	6.4k, 8.0k, 12.0k, 12.8k, 16.0k, 24.0k, 25.6k, 32.0k, 48.0kHz (Can be specified for each phrase)
Speaker amplifier output	1.0W (8Ω, 5V)
Number of playback phrases	Max. 1,024 phrases
Other functions	Volume control function, Repeat function
Operating power supply voltage	+2.7V to +5.5V
Operating temperature	-40°C to +105°C
Package	30pin plastic SSOP

*HQ-ADPCM is a high sound quality audio compression technology of "Ky's".
"Ky's" is a registered trademark of National University Corporate Kyushu Institute of Technology.
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