STA016T datasheet(4/45 Pages) STMICROELECTRONICS

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STA016T

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Figure 2. Block Diagram

The basic functions of the device can be fully operated via the I

2C bus. Besides that the GPSO interface can be

used to move huge amount of data this fast and flexible interface can achieve transfer rates up to 5 Mbit/s.

The embedded DSP firmware implements all the layers required to decode a standard data CD, as shown in

the Figure 3:

Figure 3. Layers performed by embedded DSP firmware

The whole CDROM and file-system decoding task is performed by embedded firmware. The application MCU,

basically, must manage CDDSP device according to STA016 requests. Three basic command flows exist:

MCU -> STA016: commands used to handle decoder operation and to ask for specific information like

filename, filelength, sector raw data, etc. This flow will use I2C (GPSO for special operations) interface.

STA016 -> MCU: this channel is used to retrieve inquired information and to inform MCU that a CDDSP

CDDSP

I/F

SECTOR

BUFFER

SYNC

DETECT.

MMDSP

CORE

- ISO9660 + JOLIET

- BCI

- MP3 + ADPCM

DESCRAM.

INPUT SELECTOR

CDROM DECODER (C3)

ECC/EDC

CD_BCK

CD_SDI

CD_LRCK

I2S IN

I/F

BCKI

SDI

LRCKI

STB

RQST

I2C

I/F

I2C

REG BANK

PLL

OSCK

XTI

XTO

OSC

PCM OUTPUT

BUFFER

I2S OUT

I/F

GPSO

I/F

SCL

SDA

GPSO_REQ

GPSO_SDO

GPSO_CK

LRCKO

SDO

BCKO

SDI

I/F

BS_BCK

BS_SDI

BS_LRCK

DREQ

D00AU1221

FRAMES to SECTOR TRANSLATOR

SYNC DETECTOR

DESCRAMBLER

EDC/ECC (C3)

ISO9660 File System Decoding

(with Joliet support)

Browsing Command Interface

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