FEDL22530-01 Issue date: Apr 24, 2020 ML22530 4-Channel Mixing Speech Synthesis LSI for Automotive Overview ML22530 is a 4-channel mixing speech synthesis LSI with a serial audio interface and a serial flash memory interface for sound data. *1 It adopts a HQ-ADPCM , 16-bit D/A converter, and low-pass filter for high sound quality, and incorporates a 1.0W mono speaker amplifier for driving speakers directly. It is also equipped with a function to detect failure. The functions necessary for sound output are integrated into a single chip, so that sound functions can be realized simply by adding this LSI. *1 Memory capacity and maximum sound production time (HQ-ADPCM algorithm, registered phrase 1024) Product Name Flash memory capacity Maximum sound production time (sec) f =8.0kHz f =16.0kHz f =32.0kHz s s s 128Mbits ML22530 5240 2620 1310 (Serial Flash Memory) Analog Signal FLASH MEMORY 16bit Filter MIX Speaker Decode MIX DAC AMP Volume Host SAI MCU Line Speaker AMP AMP 2 I C Sound Check SPI Application Circuit *1 HQ-ADPCM isKy high-quality audio compression technique. Ky is a registered trademark of Kyushu Institute of Technology, a national university corporation. FEDL22530-01 ML22530 Feature Sound data Speech synthesis algorithm: The algorithm can be specified for each phrase. HQ-ADPCM/4bit ADPCM2/8bit non-linear PCM / 8bit Straight PCM/16bit Straight PCM Sampling frequency: The sampling frequency can be specified for each phrase. 10.7/21.3kHz, 6.4/12.8/25.6kHz, 8.0/16.0/32.0kHz, 11.025/22.05/44.1kHz, 12.0/24.0/48.0kHz Maximum number of phrases: 4096 Phrases Edit ROM function Playback function Repeat function: LOOP command *1 Mixing-function: Up to 4-channel Volume adjustment function: CVOL command 128 levels (including off-state) AVOL command 16 levels (including off-state) Serial audio interface (slave) PCM format: 8bit Straight PCM/16bit Straight PCM Sampling frequency: 8.0/16.0/32.0kHz, 11.025/22.05/44.1kHz, 12.0/24.0/48.0kHz Data length: 8bit/16bit BCLK frequency: 32fs to 64fs LRCLK transfer mode LRCLK forward/reverse selectable 1-bit delay ON/OFF selectable MSB first/LSB first selectable Low-pass filter 16-bit D/A converter O Speaker amplifier: Class AB 1. 0W 8 (SPV =5V, Ta=25 C) DD Line amplifier output: 10k driving (Exclusive operation from speaker amplifier output) External analog sound input (with analog mixing function) 2 MCU command interface: Clock Synchronous Serial Interface/I C Interface (Slaves) Failure detection function Playback sound error detection Speaker short detection: Speaker pin ground fault detection, speaker pin short detection Speaker disconnection detection Thermal detection Clock error detection Flash memory error detection Clock backup function Master clock frequency: 4.096MHz, 4.000MHz Power-supply voltage 2.7V to 5.5V O O *2 Operating temperature range: -40 C to +105 C Package: 48-pin TQFP (7mm x 7mm, 0.5mm pitch) Ordered Part Name: ML22530TB (48-pin TQFP) *1 Mixing with SAI is limited by the sampling frequency. Refer to theFunction descriptio. *2 The operating time of the speaker amplifier may be limited depending on the average ambient temperature (Ta) used. 2/176