sc9822p Silan, sc9822p Datasheet - Page 21

• Manufacturer Part Number: sc9822p
• Description: Mp3 Decoder With Esp Function And Cd Interface
• Manufacturer: Silan

5.3 Configure audio input and output interface
5.4 Configure compress mode, shake detecting mode, and shake signal shield time
5.5 Begin to encode and decode
5.6 Read Q sub code
5.7 Adopt query method to detect the state
5.8 Send WAQV signal
5.9 Send the compare& connect command
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CD back according to the effective address of Q sub code. Then begin to compare& connect to correct data.
² HOST need to configure audio input interface. The input and output are 24 Bitclk of IIS interface. Send
² HOST need to configure the compress mode. There are 4 compress modes to be selected (16: 4
² HOST need to configure the shake detecting mode. There are 4 modes to be detected(rising edge of sub
² HOST can configure shake signal shield time. Because Cd servo only receives some very short level
² HOST sends encoding start command. Send 0xa1 to register MSC80H (8’ h50).
² Read Q sub code of Cd every other time, and if the Q sub code is not continuous, do not enter Esp
² HOST will send query command every other time. Read register MSC90H (8’ h53).
² HOST sends affirm command of effective signal. When the state is normal, send the command 0x80 to
² HOST configures the compare&connect command. There are 3 methods (16-bit, 12-bit, 8-bit precision).
² HOST sends the compare & connect start command. There are two methods(3 pairs data comparative,
When read the three abnormal states of shake signal, input buffer overflow and Sdram data overflow, take
the command 0x0f to register BitStreamType (8’ h76).
compress, 16:5 compress, 16:6 compress and non-compress), which will send the command to register
MSC85H(8’ h52).
block sync signal, shake signal low level determinant; falling edge of sub block sync signal, shake signal
high level determinant; shake signal low level determinant; shake signal high level determinant), Send
the command to register MSC85H(8’ h52).
jam signal, but not the signal we need, we can solve this problem by setting the shake signal shield time.
Send the shielded time to register (8’ h5b), the unit is 128*59ns=7.552us, the length of shake signal
within the input value, it will not be considered as shake signal. The maximum shake shield time is
255x7.552us = 1,925.880 us.
control flow, delay and read again. if the Q sub code is continuous, enter Esp main control flow.
register MSC83H (8’ h51), and record the current effective address of Q sub code.
Send the command to register MSC83H(8’ h51).
direct compare & connect). Send the command to register MSC80H(8’ h51).
REV:1.0
SC9822P
Page 21 of 30
2006.07.21