ak4538 AKM Semiconductor, Inc., ak4538 Datasheet - Page 62

• Manufacturer Part Number: ak4538
• Description: 16bit ?? Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MS0198-E-01
External MCLK
(Addr:04H, D5-4)
BICK, LRCK
3. When an external clock is used in PLL mode. (Slave mode)
<Example>
(Addr:01H, D7)
(Addr:01H, D5)
(Addr:04H, D3)
MCKPD bit
PS1-0 bits
PMPLL bit
MCKO pin
MCKO bit
(Slave Mode)
(1) Release the pull-down of the XTI pin : MCKPD bit = “1”
(2) Input an external MCLK
(3) Power-up PLL : PMPLL bit = “0”
(4) Enable MCKO output : MCKO bit = “0”
(5) MCKO is output after PLL lock time.
(6) Input BICK and LRCK that synchronized in the MCKO output.
(7) Set up MCKO output frequency (PS1-0 bits)
PLL needs 40ms lock time after the PMPLL bit = “0”
If PS1-0 bits are changed before LRCK is input, MCKO is not output. PS1-0 bits should be changed after
LRCK is input.
(1)
(2)
(3)
(4)
00
40ms(max)
Figure 50. Clock Set Up Sequence(3)
“1”
Input
(5)
“1”
(6)
- 62 -
Output
(7)
Input
XX
“1”.
“0”
E xam p le :
A u d io I/F F o r m a t : I
B I C K f r e q u e n c y a t M a s t e r M o d e : 6 4 f s
Inp u t M a s t e r C lo c k S e lect at P L L M o d e : 1 1 . 2 8 9 6 M H z
O utp u t M a s t e r C lo c k F r e q u e n c y : 6 4 f s
( 6 ) B I C K a n d L R C K inp u t s t a r t
( 1 ) A d d r :0 1 H , D a t a : 0 0 H
( 2 ) I n p u t e x t e r n a l M C L K
( 3 ) A d d r :0 1 H , Data 2 0 H
( 4 ) A d d r :0 4 H , D a t a 4 A H
( 5 ) M C K O o u t p u t s t a r t s
( 7 ) A d d r :0 4 H , D a t a 6 A H
2
S
[AK4538]
2003/5