Internal Flash Memory Type
Speech Synthesis LSI with
Internal Flash Memory Type：ML226xx series
Internal P2ROMTM Memory Type：ML227xx series,ML228xx series
Long playback speech synthesis LSIs, we have a lineup of products equipped with flash memory and products equipped with P2ROM that can be used with short TAT.
Products with a flash memory that can rewrite audio data have a ROM capacity of 4Mbit-32Mbit.
LAPIS Technology's proprietary memory with P2ROM has a ROM capacity of 4Mbit-16Mbit.
Large ROM capacity is ideal for long audio playback such as voice guidance.
Feature 1Voice data can be rewritten for products with flash
The ML22Q62x allows data to be rewritten to the internal Flash memory via the MCU’s SPI I/F. In addition, audio data can be rewritten in the field even after product shipment.
Features 2Products with P2ROM™ *1 achieve short TAT! Reduce inventory risk and delivery risk
The "ML228xx" and "ML227xx" integrate LAPIS Technology’s proprietary P2ROM memory technology for storing audio data.
This provides ROHM the capability to immediately ship prototype samples and shorten mass production TAT for customers by half.
Development TAT can be shortened to around one month, about a quarter that of Mask ROM.
P2ROM enables one-time writing in the customer’s environment, making it possible to verify the sound quality on the spot without taking additional time.
(Write shipment only from LAPIS Technology for mass production)
*1 : P2ROM™ is a registered trademark of LAPIS Technology.
Feature 3Built-in high output, high efficiency Class D amp
Built-in high output 1W class D amplifier.
Class D amplifiers are more efficient and generate less heat than conventional class AB amplifiers.
Feature 4Built-in speaker fault detection function
Both the ML22Q62x and ML22Q66x are equipped with failure detection functions for detecting speaker disconnections and short-circuits.
This allows for immediate notification of speaker failures. Speaker output is stopped when a short-circuit is detected to prevent overcurrent.
Applicable Models : ML22Q62x、ML22Q66x
Feature 5Integrated mixing function for 2 internal and 1 external channels. External input is also possible, allowing the speaker amp to be used independently
The ML228xx series includes a mixing function that provides simultaneous playback of 2 internal and 1 external channels while enabling the volume to be adjusted for each sound. It is also possible to prioritize each channel.
For example, users can mix and use external voice calls while generating voice guidance and sound effects using the speech synthesis LSI. In addition, since the speaker amp function can be used independently for external voice data, it can be shared within the system as an amp to reduce costs.
Applicable Models : ML22863、ML22864、ML22865、ML22823、ML22824、ML22825