ST3014 Datasheet, PDF (1/14 Pages) Sitronix Technology Co., Ltd. – Audio Decoder/Encoder

ST
ST3014
Audio Decoder/Encoder
Notice: Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice. This is not a final specification.
Some parameters are subject to change.
1. FEATURES
24-bit DSP based voice/audio processor
Operation voltage
– Core logic: 2.25V~2.7V
– I/O pads: 3.0V~3.6V
Voltage regulator for core logic
Low Voltage Reset (LVR)
_ 2.5V low voltage reset
One PLL to generate high system frequency from a
3MHz source
_ 12M~30MHz PLL output
Tow clock sources
_ Crystal...........................................................3MHz
_ External input...……………………………......3MHz
Low power down current
_Typical current: 3uA
One 16-bit programmable Timer
One clocking output
One external interrupt
_ Edge/level trigger supported
One 16-bit direct-drive DAC
– Maximum current: 145mA
MCU interfaces
_ Parallel mode
Two Serial PORT interfaces(SP)
_ Programmable data length from 8-bit to 16-bit
_ I2S, Left/Right Justified interfaces to external DAC/ADC
Function List
_MBRC playback (5.4Kbps, 6.4Kbps for 8KHz)
(7.4Kbps, 8.8Kbps for 11KHz)
1. AB-Repeat
2. Time stretch
(speed up x2, speed down x2)
3. Combine syllable
4. Encryption
_Audio Playback (CBR, VBR-- all bit rate)
1. Forward/Backward play , AB-Repeat
2. Encryption
3. Spectrum gain
4. Time stretch
(speed up x1.5, speed down x1.5)
5. Combine syllable
_Wav Playback
1. Forward/Backward play, AB-Repeat
_Wav Record {MS-ADPCM(3.8:1)}
1. Software AGC
_RS-Word, RS-PY
_TTS
2. GENERAL DESCRIPTION
The ST3014 is a highly integrated and cost-effective 24-bit
DSP based audio processor for various consumer applications.
It consists of one powerful DSP for advanced voice decoder
and encoder algorithms of natural speech with less memory. It
provides middle bit rate compression (MBRC) for voice
playback and audio playback.
System clock comes from 3MHz crystal or external input.
ST3014 has 32 I/Os and these can be either GPIO or
functional pins. Each pin can be programmed to input or output.
One external interrupt pin can be requested by external
Ver 0.2
1/14
2007-06-14