Datasheet > SPCA751A-P101

SPCA751A-P101

更新时间： 2024-11-29 22:17:11

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
13页	105K
描述
a single chip signal processor optimized for MPEG audio decoding and voice recording

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SPCA751A-P101 数据手册

Preliminary

SPCA751A-P101

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/I²S 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:

FM / AM Tuner

LCD

Key Scan

PC parallel or

USB port

Speaker

Audio DAC

Normal / I²S

SPCA751A

Microphone

DRAM

(8KHz 10bit)

System uP

(SPCP751A)

ATAPI (CDROM/HD)

FLASH/Plug-in

Cards

DC-DC

Converter

3.3V

AA battery x 1

DSA / I²C

CDdsp interface

CD Kit

MPEG Audio Player System Block Diagram

12 3 4 5 6 7...13

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