AK4644 Datasheet, PDF (93/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/RCV-AMP

ASAHI KASEI
[AK4644]
4. EXT Slave Mode
External MCKI
External BICK
External LRCK
Input
Input
Input
(1)
Example
(1)
Audio I/F Format :MSB justified(ADC & DAC)
Input MCKI frequency:1024fs
(1)
(1) Stop the external clocks
Figure 86. Clock Stopping Sequence (4)
<Example>
(1) Stop the external MCKI, BICK and LRCK clocks.
5. EXT Master Mode
External MCKI
(1)
Input
BICK
Output
"H" or "L"
Example
Audio I/F Format :MSB justified(ADC & DAC)
Input MCKI frequency:1024fs
LRCK
Output
"H" or "L"
(1) Stop the external MCKI
Figure 87. Clock Stopping Sequence (5)
<Example>
(1) Stop MCKI clock. BICK and LRCK are fixed to “H” or “L”.
„ Power down
Power supply current can be shut down (typ. 10µA) by stopping clocks and setting PMVCM bit = “0” after all blocks
except for VCOM are powered-down. Power supply current can be also shut down (typ. 10µA) by stopping clocks and
setting PDN pin = “L”. When PDN pin = “L”, the registers are initialized.
MS0477-E-01
- 93 -
2006/10