AK4640VG Asahi Kasei Microsystems, AK4640VG Datasheet - Page 67

• Manufacturer Part Number: AK4640VG
• Description: 16BIT CODEC WITH MIC /HP/SPK-AMPl
• Manufacturer: Asahi Kasei Microsystems

ASAHI KASEI
MS0273-E-00
External MCLK
External MCLK
(Addr:05H, D6-5)
4. When an external clock is used in PLL mode. (Master mode)
(Addr:04H, D5-4)
<Example>
5. External clock mode
BICK, LRCK
BICK, LRCK
<Example>
BICK, LRCK
(Addr:01H, D7)
(Addr:01H, D7)
(Addr:01H, D5)
(Addr:04H, D3)
(Master Mode)
(Master Mode)
MCKPD bit
FS1-0 bits
MCKPD bit
PS1-0 bits
PMPLL bit
MCKO pin
(Slave Mode)
MCKO bit
(1) Release the pull-down of the XTI pin : MCKPD bit = “1” → “0”
(2) Input an external MCKI
(3) Power-up PLL : PMPLL bit = “0” → “1”
(4) Enable MCKO output : MCKO bit = “0” → “1” and set up MCKO output frequency (PS1-0 bits)
(5) MCKO, BICK and LRCK are output after PLL lock time.
(1) Release the pull-down of the XTI pin : MCKPD bit = “1” → “0”
(2) Set up MCKI frequency (FS1-0 bits)
(3) Input an external MCKI
(4) In slave mode, input MCKI, BICK and LRCK.
(5) In master mode, while MCKI is input, BICK and LRCK are output.
PLL needs 40ms lock time after the PMPLL bit = “0” → “1”.
00
(1)
(1)
(2)
(2)
00
(3)
(3)
(4)
(5)
(4)
Figure 48. Clock Set Up Sequence(4)
Figure 49. Clock Set Up Sequence(5)
40ms(max)
Input
XX
Input
Input
Output
(5)
- 67 -
XX
Output
Output
E xam ple :
E xam ple :
(5 ) M C K O , BIC K an d L R C K output starts
A udio I/F Fo rm at : I
B IC K freq ue ncy at M a ste r M o de : 64fs
Inp ut M aster C lo c k S e lect at P LL M o de : 1 1.2 896M H z
O utp ut M as ter C lo ck F re q ue ncy : 6 4fs
A udio I/F Fo rm at : I
B IC K frequency at M aster M o de : 64fs
Input M aster C lo ck Frequency : 256fs
O utput M aster C lo ck Frequency : 64fs
(4 ) In p ut B IC K and L R C K (S lave)
(5 ) B IC K an d L R C K ou tp ut(M aster)
(1 ) A dd r:01 H , D ata:00 H
(2 ) In pu t extern al M C LK
(3 ) A dd r:01 H , D ata 20 H
(4 ) A dd r:04 H , D ata 6A H
(1 ) A dd r:0 1H , D ata:00 H
(2 ) A dd r:0 5H , D ata 00 H
(3 ) In pu t external M C L K
2
2
S
S
[AK4640]
2004/03