ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 107

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

MS0625-E-01
Power Supply
(Addr:00H, D6)
PMVCM bit
(Addr:01H, D3)
5. EXT Master Mode
<Example>
LRCK pin
BICK pin
MCKI pin
PDN pin
M/S bit
(1) After Power Up, PDN pin = “L”
(2) MCKI should be input.
(3) After DIF1-0 and FS1-0 bits are set, M/S bit should be set to “1”. Then LRCK and BICK are output.
(4) Power Up VCOM: PMVCM bit = “0”
The AK4648 should be operated as the recommended power-up/down sequence shown in “System Design
(Grounding and Power Supply Decoupling)” to avoid the pop noise at the speaker output, lineout output, and
headphone output.
VCOM should first be powered up before the other block operates.
(1)
(2)
(3)
(4)
Figure 75. Clock Set Up Sequence (5)
Output
Input
“H”. “L” time of 150ns or more is needed to reset the AK4648.
“1”
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(1) Power Supply & PDN pin = “L”
Example:
Input MCKI frequency: 256fs
MCKO: Disable
Sampling Frequency: 44.1kHz
Audio I/F Format: MSB justified (ADC and DAC)
(3) Addr:04H, Data:02H
BICK and LRCK output
(4) Addr:00H, Data:40H
Addr:05H, Data:00H
Addr:01H, Data:08H
(2) MCKI input
“H”
[AK4648]
2007/06