AK4558EN Datasheet, PDF (79/94 Pages) Asahi Kasei Microsystems – 108dB 216kHz 32Bit CODEC with PLL

[AK4558]
4. EXT Master Mode
External MCKI
(1)
Input
BICK
Output
"H" or "L"
Example
: ^{Audio I/F Format : 32bit I2S (ADC & DAC)}
Input MCKI frequency:256fs
(1) Stop the external MCKI
LRCK
Output
"H" or "L"
Figure 65. Clock Stopping Sequence (4)
<Example>
(1) Stop MCKI clock. BICK and LRCK are fixed to “H” or “L”.
6. System Reset
The AK4558 should be reset once by bringing the PDN pin to “L” upon power-up. Reference voltage such
as VCOM is powered up by the PDN pin, and the internal timing starts as the internal circuit is powered
up on MCKI and LRCK rising edge “”. The ADC and DAC blocks are in power down state until MCKI,
LRCK and BICK are input.
015004500-E-02
- 79 -
2015/09