SC9822P

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.0

2006.07.21

Http: www.silan.com.cn

Page 13 of 30

3) DecodeMp3

InpRegHigh&InpRegLow is 16 bits unsigned number, indicate the playing music file number; InpReg2High

is an 8 bits unsigned number, indicate whether this music needs ID3 decode;

4) PreDecodeFinished

OutReg1High&OutReg1Low, 16 bits unsigned number, is used to indicate the ID3 start page address in

the process of PreDecode after ID3 decode; OutReg2High, 8 bits unsigned number, ID3 shift address; If

these three registers are all 0xFF, this song will not contain ID3 information;

5) ContinueAfterPreDecode

After host detects the PreDecodeFinished, the system will send command for playing music; and the host

has read the ID3 information before send command.

6) FastForward

InpReg1High, is used to express the second of each fastforward unit; InpReg1Low, is used to express the

fastforward ratio, the detail see the following table:

InpRegHigh

00h

10h

20h

30h

play time(s)

0.5

1

2

4

Not support others

InpRegLow

00h

01h

02h

03h

Skip scale

1:1

1:2

1:4

1:8

Skip scale is the ratio of play time and leap time.

7) FastBackward

InpReg1High, is used to express the second of each fastbackward unit; InpReg1Low

is used to express

the fastforward ratio; Where the meanings of InpRegHigh is the same as fastforward; but the InpRegLow is

different, it expresses n of the play time: skip time=1: n.

8) RequestData

OutReg1High, OutReg1Low, OutReg2High are the MSF of download address;

9) OperationErr

Except SetUpCDFS, if host detects the OperationErr at other state, it will send ForwardSkipFrame

command; if the host received this command time after time during one song, it indicates this song has been

serious damaged; it can jump to the next song.

10 SetUpCDFS2

Establish the tile document system; the meanings of the input and output parameter is the same as

SetUpCDFS;

11 GetVersion

Return to the current version number, OutRegHigh is the main version number, and the OutRegLow is the

vice version number.

12 SetMaxPhysicalMSF

The master indicates the SC9822P the maximum physical address of the CD by this command. The

registers InpReg1High, InpReg1Low, and InpReg2High are corresponding to MSF value;