Datasheet

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SRC4382
SBFS030C – JANUARY 2006 – REVISED SEPTEMBER 2007
Registers 1F through 28: Q-Channel Sub-Code Data Registers
Registers 0x1F through 0x28 comprise the Q-channel sub-code buffer, which may be accessed for audio CD playback. The Q-channel data provides
information regarding the playback status for the current disc. The buffer data is decoded by the DIR block.
Register 1F: Q-Channel Sub-Code Data Register 1 (Read-Only), Bits[7:0], Control and Address
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Register 20: Q-Channel Sub-Code Data Register 2 (Read-Only), Bits[15:8], Track
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15
Register 21: Q-Channel Sub-Code Data Register 3 (Read-Only), Bits[23:16], Index
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23
Register 22: Q-Channel Sub-Code Data Register 4 (Read-Only), Bits[31:24], Minutes
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q24 Q25 Q26 Q27 Q28 Q29 Q30 Q31
Register 23: : Q-Channel Sub-Code Data Register 5 (Read-Only), Bits[39:32], Seconds
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q32 Q33 Q34 Q35 Q36 Q37 Q38 Q39
Register 24: : Q-Channel Sub-Code Data Register 6 (Read-Only), Bits[47:40], Frame
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q40 Q41 Q42 Q43 Q44 Q45 Q46 Q47
Register 25: Q-Channel Sub-Code Data Register 7 (Read-Only), Bits[55:48], Zero
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q48 Q49 Q50 Q51 Q52 Q53 Q54 Q55
Register 26: Q-Channel Sub-Code Data Register 8 (Read-Only), Bits[63:56], AMIN
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q56 Q57 Q58 Q59 Q60 Q61 Q62 Q63
Register 27: Q-Channel Sub-Code Data Register 9 (Read-Only), Bits[71:64], ASEC
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q64 Q65 Q66 Q67 Q68 Q69 Q70 Q71
Register 28: Q-Channel Sub-Code Data Register 10 (Read-Only), Bits[79:72], AFRAME
Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Q72 Q73 Q74 Q75 Q76 Q77 Q78 Q79
Registers 29 through 2C: IEC61937 PC/PD Burst Preamble
The PC and PD burst preambles are part of the IEC61937 standard for transmission of data reduced, non-PCM audio over a standard two-channel interface
(IEC60958). Examples of data-reduced formats include Dolby AC-3, DTS, various flavors of MPEG audio (including AAC), and Sony ATRAC. The PA and PB
preambles provide synchronization data, and are fixed values of 0xF872 and 0x4E1F, respectively. The PC preamble indicates the type of data being carried by
the interface and the PD preamble indicates the length of the burst, given as number of bits.
Registers 0x29 through 0x2C contain the PC and PD preambles as decoded by the DIR block.
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