Sound playback, both sound effects and voice, are now built into a great many household products and industrial equipment. Sound playback has also gained popularity as an important feature for providing improved accessibility for visually impaired or elderly users. Providing sound playback in consumer products and compact industrial equipment requires very cost effective solutions giving the added functionality at minimum additional cost.
Renesas provides audio decompression software libraries that operate at high speed and with a small memory footprint. The compact and low-cost R8C Family microcontrollers, with the ability to easily generate PWM signals, without the need for special peripheral devices, allows easy addition of advanced flexible sound playback capabilities to products that previously had a simple buzzer as their only sound playback.
System Block Diagram
|Block||Semiconductor device||Recommended products||Features, etc.|
|Control MCU||MCU||H8/300H Tiny Series||Standard MCU|
|Signal amplifier||Op-amp.||HA1630xxx Series||For 32 W speaker/headphone output|
|Memory for |
large amount of
|EEPROM||R1EX24xxx Series||I2C bus interface *1|
|R1EX25xxx Series||SPI bus interface *2|
|General use, Surge absorption, Circuit protection, etc.||Zener diode||NNCDxxDA Series||High ESD tolerance optimal for use in surge absorption|
|RDxxS Series||2 terminals SMD|
|Audio||Digital amp. IC||R2A15120FA||15 W x 2 ch: BTL (built-in limiter)|
|R2A15123FP||4 W x 2 ch: Single end|
|Electronic Volume||M61545AFP/FP||2 channels, power supply: 4.5 to 15 V, 2-wire serial interface|
*1 I2C: Inter-Integrated Circuit
*2 SPI: Serial Peripheral Interface
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