ak4538 AKM Semiconductor, Inc., ak4538 Datasheet - Page 67

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

ASAHI KASEI
n Stop of Clock
MCLK can be stopped when PMMIC=PMADC=PMDAC=PMSPK= “0”.
MS0198-E-01
External MCLK
1. When X’tal is used in PLL mode
<Example>
2. When an external clock is used in PLL mode
<Example>
(Addr:03H, D4)
(Addr:01H, D5)
(Addr:01H, D7)
MCKPD bit
(Addr:03H, D4)
(Addr:01H, D6)
(Addr:01H, D5)
(Addr:01H, D7)
MCKPD bit
PMPLL bit
PMXTL bit
PMPLL bit
MCKO bit
MCKO bit
(1) Disable MCKO output : MCKO bit = “1”
(2) Power down X’tal and PLL : PMXTL bit = PMPLL bit = “1”
(3) Pull down the XTI pin : MCKPD = “0”
(1) Stop MCKO output : MCKO bit = “1”
(2) Power down PLL, Pull down the XTI pin : PMPLL bit = “1”
(3) Stop an external MCLK
When the external MCLK becomes Hi-Z or the external MCLK is input by AC couple, MCKI pin should be
pulled down.
Input
(1)
(1)
(2)
(3)
(2)
(3)
Figure 56. Stop of Clock Sequence(1)
Figure 57. Stop of Clock Sequence(2)
“0”
“1”
“0”
- 67 -
“0”, MCKPD = “0”
“0”
E xam p le :
E x a m p le :
A u d i o 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 aster M o d e : 64fs
Input M a s t e r C lo c k S e le c t a t P L L M o d e : 1 1 . 2 8 9 6 M H z
O utput M a s t e r C lo c k Frequency : 64fs
A u d io I/F : 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
I n p u t M a s t e r C l o c k S e l e c t a t P L L M o d e : 1 1 . 2 8 9 6 M H z
O u t p u t M a s t e r C l o c k F r e q u e n c y : 6 4 f s
( 1 ) A d d r : 0 4 H , D a t a : 6 2 H
( 2 ) A d d r : 0 1 H , D a t a : 8 0 H
( 3 ) S t o p e x t e r n a l c l o c k
( 1 ) A d d r : 0 4 H , D a t a : 6 2 H
( 2 ) A d d r : 0 1 H , D a t a : 0 0 H
( 3 ) A d d r : 0 1 H , D a t a 8 0 H
2
S
2
S
“1”
[AK4538]
2003/5