ak4538 AKM Semiconductor, Inc., ak4538 Datasheet - Page 63

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

ASAHI KASEI
MS0198-E-01
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”
(2) Input an external MCLK
(3) Power-up PLL : PMPLL bit = “0”
(4) Enable MCKO output : MCKO bit = “0”
(5) MCKO, BICK and LRCK are output after PLL lock time.
(1) Release the pull-down of the XTI pin : MCKPD bit = “1”
(2) Set up MCLK frequency (FS1-0 bits)
(3) Input an external MCLK
(4) In slave mode, input MCLK, BICK and LRCK.
(5) In master mode, while MCLK is input, BICK and LRCK are output.
PLL needs 40ms lock time after the PMPLL bit = “0”
00
(1)
(1)
(2)
(2)
00
(3)
(3)
(4)
(5)
(4)
40ms(max)
Figure 51. Clock Set Up Sequence(4)
Figure 52. Clock Set Up Sequence(5)
“1”
Input
XX
“1” and set up MCKO output frequency (PS1-0 bits)
(5)
Input
Input
Output
- 63 -
XX
Output
Output
“1”.
“0”
“0”
Exam p le :
Exam p le :
(5) MCKO, BICK and LRCK output starts
Audio I/F Format : I
BICK frequency at Master Mode : 64fs
Input Master Clo c k S e lect at PLL Mode : 11.2896MHz
O utput Master Clock Frequency : 64fs
Audio I/F Format : I
BICK frequency at Master Mode : 64fs
Input Master Clock Frequency : 256fs
O utput Master Clock Frequency : 64fs
(4) Input BICK a n d L R C K ( S lave)
(5) BICK and LRCK output(Master)
(1) Addr:0 1 H , Data:00H
(2) Input external MCLK
(3) Addr:0 1 H , Data 20H
(4) Addr:0 4 H , Data 6AH
(1) Addr:01H, Data:00H
(2) A d d r:05H, Data 00H
(3) Input external MCLK
2
2
S
S
[AK4538]
2003/5