PEDL2257XDIGEST-04
Issue Date: Sep. 30, 2009
ML22Q573-NNNMB/ML2257X-xxxMB Datasheet
Preliminary
4-Channel Mixing Speech Synthesis LSI with Built-in FLASH/MASK ROM
GENERAL DESCRIPTION
The ML22Q573-NNN and ML2257X-xxx are 4-channel mixing speech synthesis LSIs with built-in
FLASH/MASK ROM for voice data. These LSIs incorporate into them an HQ-ADPCM decoder that enables
high sound quality, 16-bit D/A converter, low-pass filter, and 1.0 W monaural speaker amplifier for driving
speakers. Since functions necessary for voice output are all integrated into a single chip, a system can be
upgraded with audio features by only using one of these LSIs.
• Capacity of internal memory and the maximum voice production time (when HQ-ADPCM method used)
Product name
ROM capacity
Maximum voice production time (sec)
fsam = 8.0 kHz
fsam = 16.0 kHz
fsam = 32.0 kHz
ML22Q573-NNN
ML22573-xxx
4 Mbits
161
80
40
ML22572-xxx
2 Mbits
79
39
19
FEATURES
• Speech synthesis method:
Can be specified for each phrase.
HQ-ADPCM / 8-bit non-linear PCM / 8-bit PCM / 16-bit PCM
• Sampling frequency:
Can be specified for each phrase.
12.0/24.0/48.0 kHz, 8.0 / 16.0/32.0 kHz, 6.4/12.8/25.6 kHz
• Built-in low-pass filter and 16-bit D/A converter
• Built-in speaker driver amplifier:
Target specifications: 1.0 W, 8Ω (at DVDD = 5 V and Ta = 85°C)
• External analog voice input (built-in analog mixing function)
• CPU command interface:
Clock synchronous serial interface
• Maximum number of phrases:
1024 phrases, from 000h to 3FFh
• Edit ROM
• Volume control:
CVOL command: Adjustable through 32 levels (including OFF)
AVOL command: Adjustable through 50 levels (including OFF)
• Repeat function:
LOOP command
• Channeｌ mixing function:
4 channels
• Power supply voltage detection function: Can be controlled at six levels from 2.7 to 4.0 V (including the
OFF setting)
• Source oscillation frequency:
4.096 MHz
• Power supply voltage:
2.7 to 5.5 V
• Operating temperature range:
–40°C to +105°C
• Package:
30-pin plastic SSOP(P-SSOP30-56-0.65-6K-MC)
•Product name:
ML22Q573-NNNMB
ML22573-xxxMB/ML22572-xxxMB
(“xxx” denotes ROM code number)
※
HQ-ADPCM is a high sound quality audio compression technology of "Ky's".
“Ｋｙ’ｓ” is a Registered trademark of National Universities corporate Kyushu
Institute of Technology
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