S5L9276 View Datasheet(PDF) - Samsung
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Description
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S5L9276 Datasheet PDF : 50 Pages
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OPTICAL CD MP3 SYSTEM
S5L9276 (PRELIMINARY SPEC)
Burst Transfer without the number of sectors being transferred.
Verify the Input Buffer is in LOW state. The register H_IB_STATE tells Input Buffer (Empty, Low, or High).
When there is any change in the H_IB_STATE, "Input Buffer " Interrupt arises, and External MCU can read the
H_IB_STATE to know the Input State. When Input Buffer is in lower than the "Input Buffer Low Threshold" we
say is in LOW state. Input Buffer Low Threshold is determined by the value of the register _IB_WR_OFFSET. It
has the following relationship.
Low Threshold = (Input Buffer Size in number of words) - (H_IB_WR_OFFSET)*1024
Micom decides the start sector address from which the CD-ROM sectors are transferred S5L9276.
Write 0 to the H_FRAME_NO. (The default value after reset this is 0 therefore, this would not be necessary.)
Micom initiate to transfer CD-ROM sectors from CDP subsystem to S5L9276 starting the address (MSF) which
is several sectors ahead the start sector address.
Micom gets sector address information (MSF) from CDP subsystem while CDP transfers CD-ROM sectors to
S5L9276.
Micom checks continuously if the MSF received from CDP subsystem is reached at the MSF from which Micom
wants to put the corresponding sector in S5L9276.
If the MSF received from CDP subsystem is reached at (the start MSF - 1), Micom "0x91" to H_OPSR_W in
S5L9276 to allow for S5L9276 to start decode sectors when sector boundary is reached.
When "Dump-End" interrupt encountered during sector transfer, it indicates the input is in BUFFER-HIGH state
and any more transfer is discarded to avoid input buffer .
Read the H_DUMP_CNT register which represents the number of sectors that have successfully transferred.
Micom calculate new start sector address which is the one for the next to the last which has been transferred
before.
Repeat the whole process.
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