ASAHI KASEI
[AK4122]
Non-PCM Bitstream Timing
(1) When Non-PCM preamble does not arrive within 4096 frames
PDN pin
Bit stream
1
1
2
2
3
3
Pa Pb Pc Pd
Pa Pb Pc Pd
Pa Pb Pc Pd
Repetition time
>4096 frames
AUTO bit
3
Pc
Pc Register
Pd Register
1
Pc
2
Pc
“0”
“0”
3
Pd
1
Pd
2
Pd
Figure 27. Timing example 1
(2) When Non-PCM bitstream stops (when MULK0=0)
INT0 hold time
INT0 pin
<20mS (Lock time)
Bit stream
AUTO bit
Pa Pb Pc1 Pd1
Stop
2~3 Syncs (B,M or W)
Pa Pb Pcn Pdn
<Repetition time
Pc Register
Pd Register
Pcn
Pc0
Pc1
Pdn
Pd0
Pd1
Figure 28. Timing example 2
MS0267-E-02
2004/07
- 48 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
