AK4640 Datasheet, PDF (72/76 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH MIC /HP/SPK-AMPl

ASAHI KASEI
[AK4640]
3. External clock mode
M C K P D bit
(A ddr:01H , D 7)
E xternal M C LK
Exam ple :
(1) Addr:01H , D ata:80H
Input
Figure 55. Stop of Clock Sequence(3)
(2) Stop external clock
<Example>
(1) Pull down the XTI pin : MCKPD = “0” → “1”
When the external MCKI becomes Hi-Z or the external MCKI is input by AC couple, MCKI pin should be
pulled down.
(2) Stop an external MCKI
„ Power down
Power down VCOM(PMVCM= “1” → “0”) after all blocks except VCOM are powered down and MCKI stops. The
AK4640 is also powered-down by PDN pin = “L”. When PDN pin = “L”, the registers are initialized.
MS0273-E-00
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2004/03