ak4683 AKM Semiconductor, Inc., ak4683 Datasheet - Page 52

• Manufacturer Part Number: ak4683
• Description: Asynchronous Multi-channel Audio Codec With Dir/t
• Manufacturer: AKM Semiconductor, Inc.

■
The AK4683 has Q-subcode buffer for CD application. The AK4683 takes Q-subcode into registers by following
conditions.
1. The sync word (S0,S1) is constructed at least 16 “0”s.
2. The start bit is “1”.
3. Those 7bits Q-W follows to the start bit.
4. The distance between two start bits are 8-16 bits.
The QINT bit in the control register goes “1” when the new Q-subcode differs from old one, and goes “0” when QINT
bit is read.
Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q24 Q25
Q26 Q27 Q28 Q29 Q30 Q31 Q32 Q33 Q34 Q35 Q36 Q37 Q38 Q39 Q40 Q41 Q42 Q43 Q44 Q45 Q46 Q47 Q48 Q49
Q50 Q51 Q52 Q53 Q54 Q55 Q56 Q57 Q58 Q59 Q60 Q61 Q62 Q63 Q64 Q65 Q66 Q67 Q68 Q69 Q70 Q71 Q72 Q73
Q74 Q75 Q76 Q77 Q78 Q79 Q80 Q81 Q82 Q83 Q84 Q85 Q86 Q87 Q88 Q89 Q90 Q91 Q92 Q93 Q94 Q95 Q96 Q97
MS0427-E-02
Addr
Q-subcode buffers
1CH Q-subcode Zero
1DH Q-subcode ABS Minute
1AH Q-subcode Second
1BH Q-subcode Frame
1EH Q-subcode ABS Second
1FH Q-subcode ABS Frame
16H Q-subcode Address / Control
17H Q-subcode Track
18H Q-subcode Index
19H Q-subcode Minute
CTRL
ABSOLUTE FRAME
S97
S0
S1
S2
S3
S0
S1
S2
S3
:
:
MINUTE
ZERO
Register Name
1
0
0
1
1
1
0
0
1
1
:
:
ADRS
Q97 R97 S97 T97 U97 V97 W97 0…
Q2
Q3
Q2
Q3
2
0
0
0
0
↑
Q
:
:
R2
R3
R2
R3
3
0
0
0
0
:
:
Figure 31. Configuration of U-bit(CD)
(*) number of "0" : min=0; max=8.
S2
S3
S2
S3
4
0
0
0
0
Q17
Q81
:
:
Figure 33. Q-subcode register
Q9
D7
···
···
···
···
···
···
···
Figure 32. Q-subcode
ABSOLUTE MINUTE
TRACK NUMBER
T2
T3
T2
T3
5
0
0
0
0
:
:
Q16
Q80
Q8
SECOND
D6
···
···
···
···
···
···
···
- 52 -
U2
U3
U2
U3
6
0
0
0
0
:
:
D5
···
···
···
···
···
···
···
···
···
···
V2
V3
V2
V3
7
0
0
0
0
:
:
G(x)=x
W2
W3
W2
W3
D4
8
0
0
0
0
···
···
···
···
···
···
···
···
···
···
:
:
CRC
16
+x
0…
0…
0…
0…
0…
0…
0…
0…
12
*
:
:
+x
D3
···
···
···
···
···
···
···
···
···
···
5
+1
ABSOLUTE SECOND
D2
···
···
···
···
···
···
···
···
···
···
FRAME
INDEX
Q11
Q75
D1
Q3
···
···
···
···
···
···
···
[AK4683]
Q10
Q74
D0
Q2
2007/04
···
···
···
···
···
···
···