ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 83

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
When ADC or DAC is powered-up, the clocks must be supplied.
1. PLL Master Mode.
MS0477-E-01
Power Supply
PMVCM bit
(Addr:00H, D6)
(Addr:01H, D1)
(Addr:01H, D0)
(Addr:01H, D3)
Clock Set up
PMPLL bit
LRCK pin
MCKO pin
MCKO bit
<Example>
BICK pin
MCKI pin
PDN pin
M/S bit
(1) After Power Up, PDN pin = “L”
(2) DIF1-0, PLL3-0, FS3-0, BCKO and M/S bits should be set during this period.
(3) Power UpVCOM: PMVCM bit = “0”
(4) In case of using MCKO output: MCKO bit = “1”
(5) PLL lock time is 40ms(max) after PMPLL bit changes from “0” to “1” and MCKI is supplied from an external
(6) The AK4644 starts to output the LRCK and BICK clocks after the PLL becomes stable. Then normal operation
(7) The invalid frequency is output from MCKO pin during this period if MCKO bit = “1”.
(8) The normal clock is output from MCKO pin after the PLL is locked if MCKO bit = “1”.
“L” time of 150ns or more is needed to reset the AK4644.
VCOM should first be powered-up before the other block operates.
In case of not using MCKO output: MCKO bit = “0”
source.
starts.
(1)
(2)
(3)
(4)
(5)
Figure 74. Clock Set Up Sequence (1)
40msec(max)
(7)
40msec(max)
CONTROL SEQUENCE
“H”
Input
“1”
(6)
(8)
- 83 -
Output
Output
Example:
(1) Power Supply & PDN pin = “L”
Input Master Clock Select at PLL Mode: 11.2896MHz
BICK frequency at Master Mode: 64fs
Audio I/F Format: MSB justified (ADC & DAC)
MCKO: Enable
Sampling Frequency: 44.1kHz
MCKO, BICK and LRCK output
(2)Addr:01H, Data:08H
(4)Addr:01H, Data:0BH
(3)Addr:00H, Data:40H
Addr:04H, Data:4AH
Addr:05H, Data:27H
[AK4644]
“H”
2006/10