Epson S1C31D51 Arm Cortex-M0+ microcontroller for audio

In the S1C31D51 single chip microcontroller, an additional hardware processor ensures that voice output and audio playback work simultaneously via two separate channels. Audio output like e.g. signal sounds can also be realised via a buzzer. In order to optimise the output quality sustainably, Epson relies on a specially developed combination of software and hardware.

Thanks to the HW processor, no CPU resources are required, so that these are also available for other tasks without restriction during the playback processes. In addition, security functions, such as the self-check for faulty data in the integrated RAM and flash memory or in the peripheral QSPI flash memory, perform without any loss of CPU performance.

Epson‘s own codec format EOV (Epson Own Voice) compresses voice and audio data at a sampling rate of 15,635kHz and 16kbps to such an extent that the memory has significantly more capacity for audio data. The associated development software ESPER2 Voice Data Creation PC Tool enables the uncomplicated and fast generation of voice and audio data in up to twelve languages. Cost- and time-intensive studio recordings are thus obsolete, and the integration of already existing WAV files is possible without any problems, too.