Voice MCU

Epson offers simplest speech IC without traditional studio recording by a person. Our sophisticated codec engine eliminates such studio recording and generates neutral human sound quality as well as high compression rate. The Epson Voice/Audio IC enables a seamless IC platform to transform almost any applications into user-friendly voice prompted devices.

Characteristics
Examples of applications
Product lineup
Customer comments
Information downloads

Characteristics

Feature1. Sound Processing without CPU resource

Dedicated HW processor achieves all sound processing

Like Software Sound operation.

No Stop by a lack of software resource
No limitation for other operation
No need to evaluate many condition for Sound play
(e.g. Sound Play x software condition)

Feature2. Providing ease of listening to individual end users

Realtime Voice Speed/Pitch Conversion
Providing ease of listening to individual end users
Voice play with background music.

Feature3. Easy to prepare Voice Data

Epson Voice Data Creation PC Tool
Easy to change/add (Suitable for Frequently/Emergency)
No cost to create Voice data(No need studio, narrator fee)
Existing wav files can be imported to the tool easily

Feature4. Easy to implement Sound Play

Just set "Sentence Number" on Epson Voice Creation PC Tool to the specific register by Cortex
Sentence Information(phrase structure, connection, delay etc) is including in Sound ROM
Even if there is a change in the content of the voice data, if there is no change in the number, there is no need to change the SW

Feature 5. Easy to expand Language support

Voice Data Creation PC Tool supports 12 language
Multi-SoundROM

12 languages voice samples

Feature 6. Achieve small memory size

High Quality & High Compression Sound Algorithm
1/4 size comparison with same sampling frequency(16kHz)
Small size(2/3) comparison with even low sampling frequency(8kHz)
Many sound data, long music can be stored.
Multiple language can be integrated.

Feature 7. Play melody/voice on Buzzer

Select Sound Output mode by a product requirement
Speaker
Buzzer(Electromagnetic Buzzer, Piezoelectric Buzzer)

Feature 8. Achieve Long Battery Life

Low Sleep current
Low Standby current
Quick clock wake-up
Low RUN current

Products lineup

	S1C31D50	S1C31D51	S1C31D41
Flash	192 KB (both program and voice)		96KB(both program and voice)
RAM	8KB(HW Processor is not active:+14KB)	10KB(HW Processor is not active:+12KB)	8KB(HW Processor is not active:+18KB)
Internal Oscillator	16/8/4MHz 1% with 32kHz external-OSC		16/8/4MHz ±1%@Ta=0~85℃
HW Processor	ver1.00	ver2.00	ver3.00
Sound Play Algorithm	EOV(EPSON Original High Compress & High Quality Format) / 16bit PCM
Sound Play channels	2ch Mixing Play(e.g. Ch.0:Voice, Ch.1:BGM)
Sampling Frequency	15.625kHz, (Suitable for Back Ground Music)
Bitrate	EOV:16/24/32/40 kbps		EOV:16/24 kbps
Multi-SoundROM	Multiple independent Sound ROM data can be stored for multilingual support, etc.
Gapless Sound Play	-	supported	-
Volume Setting	supported(0db to -63.0db:0.5db step, silence)
Repeat Setting	supported(1 to 254times, repeat until stop command)
Voice Speed Conversion	75% - 125% (5% step) Ver1.00	75% - 125% (5% step) Ver2.00
Voice Pitch Conversion	-		75% - 125% (5% step)
Tone Generation	-		supported
Buzzer Voice/Melody	-	supported	-
Serial Interface	SPI(3ch), UART(3ch), I2C(3ch), QSPI(1ch)
ADC	12bit(max 8 port)		12bit(max 8port,1port for temperature sensor)
SVD	VDD: 28 levels(1.8 to 5.0 V) / external voltage: 32 levels(1.2 to 5.0 V)
DMA	4ch (Memory ⇔ Memory, Memory ⇔ Peripheral)
RFC	CR oscillation type 24-bit counters
Timers	16bit Timer(8ch), 16bit PWM(2ch), WDT, RTC
Power Supply	1.8V～5.5V VDD / 3.3v SPI-Flash interface power supply
Flash Programming	2.4 ～ 5.5 V		2.2 ～ 5.5 V
Power Consumption - Standard Mode - Low Power Mode - SLEEP, RTC	RUN:250uA/MHz (internal:1.8v) max 16MHz RUN:150uA/MHz (internal:1.2v) max 1.8MHz SLEEP:0.46uA, RTC mode:0.95uA		RUN:215uA/MHz(internal:1.8v) max 16MHz RUN:130uA/MHz(internal:1.2v) max 1.8MHz SLEEP:0.34uA, RTC mode:0.90uA
Package	P-TQFP048-0707-0.50(0.5mm pitch) P-LQFP064-1010-0.50(0.5mm pitch) P-TQFP080-1212-0.50(0.5mm pitch) P-LQFP100-1414-0.50(0.5mm pitch)		P-TQFP032-0707-0.80(0.8mm pitch) P-TQFP048-0707-0.50(0.5mm pitch) P-LQFP064-1010-0.50(0.5mm pitch)
IEC-60730	Supported by Sample SW