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SPCA751A-P101 Datasheet

  • SPCA751A-P101

  • a single chip signal processor optimized for MPEG audio deco...

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Preliminary
Description
SPCA751A-P101
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
2
S 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:
LCD
FM / AM Tuner
Key Scan
PC parallel or
USB port
DRAM
ATAPI (CDROM/HD)
FLASH/Plug-in
Cards
DSA / I
2
C
Normal / I
2
S
Audio DAC
Microphone
Speaker
SPCA751A
System uP
(SPCP751A)
3.3V
(8KHz 10bit)
DC-DC
Converter
AA battery x 1
CDdsp interface
CD Kit
MPEG Audio Player System Block Diagram
1

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