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SPCA751A-P101 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part No. SPCA751A-P101
Description  a single chip signal processor optimized for MPEG audio decoding and voice recording
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SPCA751A-P101 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

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Preliminary
SPCA751A-P101
1
Description
The SPCA751A is a single chip signal processor optimized for MPEG audio decoding and voice recording. It is
developed to achieve a better performance/cost ratio for MPEG audio players.
The SPCA751A is especially designed for standalone audio players, the system controller can easily carry out the
MPEG audio decoding process by the use of a general serial IO/control interface for MPEG bit stream in/out and
playback control.
Decoded audio PCM data are output to external DAC through a programmable normal/I
2S DAC interface, such that
most of common audio DACs can be cooperated with SPCA751A to meet different customers' requirements.
A high quality 10-bit 8KHz sampling rate ADC is embedded for voice recording. Based on the algorithm of
SACM_S480 or SACM_S3200, voice is compressed to a low data rates of 4.8Kbps and 32Kbps respectively, while
retaining a good resolution of the original speech/audio.
The SPCA751A is designed for 3.3V applications, A built in PLL is able to synthesize the system clock from a
16.934MHz crystal oscillator source. The high performance SPCA751A signal processor can operate at 34MHz and
dissipate low power, which makes the SPCA751A extremely suitable for portable systems.
A common implementation utilizing the SPCA751A is presented below:
SPCA751A
Microphone
(8KHz 10bit)
Speaker
DC-DC
Converter
3.3V
System uP
(SPCP751A)
Key Scan
LCD
MPEG Audio Player System Block Diagram
AA battery x 1
Normal / I 2S
Audio DAC
FM / AM Tuner
CD Kit
DSA / I2C
CDdsp interface
PC parallel or
USB port
DRAM
ATAPI (CDROM/HD)
FLASH/Plug-in
Cards


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