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1 / 66 page FEDL2257-05 Issue Date: Apr. 25, 2013 ML22Q573-NNNMB/ML22Q573-xxxMB/ML2257X-xxxMB 4-Channel Mixing Speech Synthesis LSI with Built-in FLASH/MASK ROM for Automotive 1/66 GENERAL DESCRIPTION The ML22Q573-NNN, ML22Q573-xxx 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※1 method used) Maximum voice production time (sec) Product name ROM capacity fsam = 8.0 kHz fsam = 16.0 kHz fsam = 32.0 kHz ML22Q573-NNN/-xxx 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: 1.0 W, 8 Ω (at DV DD = 5 V) • 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※2 • Package: heat sink type 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 ※ 1 The limitation on the operation time changes by the using condition. (Refer to Page62) ※ 2 |
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