Built-in communication interface, logic, memory, and amplifier
Onboard lighting and main MCU refresh function
Voice data can be changed and updated even after shipment


Recently, the function of notifying pedestrians and passengers of the vehicle's status or presence has become increasingly important.

ROHM Group LAPIS Semiconductor announced on the 27th that it has developed the "ML2253x series," an automotive voice synthesis LSI suitable for voice output systems of advanced driver assistance systems (ADAS) and vehicle approach warning systems (AVAS).

The ML2253x voice synthesis LSI integrates communication interfaces, logic, memory, and amplifiers, enabling the construction of a voice output system that does not rely on an MCU.

Lapis' new automotive voice synthesis LSI features a playback anomaly detection function that outputs an error signal to the MCU and other devices. This capability improves the quality of automotive voice output systems by detecting playback anomalies such as audio interruptions.

Additionally, in addition to the onboard lighting function using the existing ROM writer, the main MCU's update function has been added. Data can be written to the built-in flash memory (ML22Q53x series) or external flash memory (ML22530 series) via the SPI I/F from the main MCU, allowing voice data to be changed and updated even after shipment.

The ML2253x series, which achieves both high sound quality and memory savings by adopting HQ-ADPCM as a compression method, began sample shipments in April at 1,300 yen per unit, excluding tax.

Development kits and reference boards for the ML2253x series, scheduled for mass production starting in July, are currently available from Chip 1 Stop and Corestaff.