S5L9274 Ver la hoja de datos (PDF) - Samsung

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S5L9274

DECODER FOR CD-MP3/CD-ROM

Samsung 

DECODER FOR CD-MP3/CD-ROM

POWER MANAGEMENT

Power Save Modes

Down : Master Clock Disabled. Whole chip is in reset state and clocking is disabled.

(Host Interface ?, Clocks for CD-DSP chip ?)

Mode : All units suspended except hifUnit and DRAM Controller Block to refresh DRAM.

S5L9274

Running

Stop

Play

MP3

Power Down

Sleep

System Power ON

Power down mode

Power down mode is implemented using MLAT, MCK, and MDAT. When the MLAT is low the MDAT is goes to

low, the CD-MP3 goes to "power down reset" mode. It means power ON state. When the MLAT is low and the

MCK goes to LOW, the CD-MP3 the "power down mode". The default value of MLAT, MCK, and MDAT is HIGH.

the system power becomes ON and the master reset comes, Micom should set the of MLAT, MCK, and MDAT to

HIGH. And should reset the power down mode of -MP3 using MLAT and MDAT LOW. Finally should send the

S/W reset to CD-MP3 H_SOFT_RST (8'hE0) register.

Sleep mode

In sleep mode, the minimal power is supplied which is needed just for DRAM refresh, host command, and etc.

There is a register H_SLEEP_CR to control Sleep . To enter sleep mode write "1xxxxxxx" into the

H_SLEEP_CR. To wake up from mode write "0xxxxxxx" into the H_SLEEP_CR.

_SLEEP_CR

8'hdf

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