S5L9274 Ver la hoja de datos (PDF) - Samsung

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componentes Descripción

Fabricante

S5L9274

DECODER FOR CD-MP3/CD-ROM

Samsung 

DECODER FOR CD-MP3/CD-ROM

S5L9274

CDFS Table Read

BI9274X decodes File Allocation Table of CD-ROM and stores it to DRAM. Micom can DRAM to read the CDFS

Table using register read protocol. (See Section MCU interface.)

Setting DRAM Refresh Rate

Micom can change DRAM refresh rate by change a code in the H_REFRESH_INTERVAL as following :

H_REFRESH_INTERVAL(8'ha2) VALUE

8'bxxxxxx00

8'bxxxxxx01

8'bxxxxxx10

8'bxxxxxx11

Maximum Refresh Interval

624 cycles

608 cycles

576 cycles

480 cycles

Configuration of DRAM Memory Map

When S5L9274 is reset the DRAM is configured to the default memory map as shown .

H_CD_START

H_CD_END

H_IB_START

0x00000

0x00DB6

0x01000

CD-ROM Decoder

Working Buffer

Not used

Input Buffer

H_IB_END

H_OBL_START

H_OBL_END

H_OBR_START

H_OBR_END

0x19FFF

0x1A000

0x280FF

0x28100

0x361FF

0x36200

0x3FFFF

Output Buffer

L_CH

Output Buffer

R_CH

Reserved

21

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