AK4536 Datasheet, PDF (18/59 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4536]
OPERATION OVERVIEW
n Master Clock Source
The AK4536 requires a master clock (MCKI). This master clock is input to the AK4536 by connecting a X’tal oscillator to
XTI and XTO pins or by inputting an external CMOS-level clock to the XTI pin or by inputting an external clock that is
greater than 50% of the DVDD level to the XTI pin through a capacitor. When using a X’tal oscillator, there should be
capacitors between XTI/XTO pins and DVSS.
Master Clock
Status
PMXTL bit
X’tal Oscillator
(Figure 15)
Oscillator ON
1
Oscillator OFF
0
External Clock Direct Input (Figure 16) Clock is input to MCKI pin.
0
MCKI pin is fixed to “L”.
0
MCKI pin is fixed to “H”.
0
MCKI pin is Hi-Z.
0
AC Coupling Input
(Figure 17) Clock is input to MCKI pin.
1
Clock isn’t input to MCKI pin.
0
Table 1. Master Clock Status by PMXTL bit and MCKPD bit
MCKPD bit
0
1
0
0/1
0
1
0
1
(1) X’tal Oscillator
XTI
C
C
MCKPD="0"
25kΩ
PMXTL = "1"
XTO
AK4536
Figure 15. X’tal mode
- Note: The capacitor values depend on the X’tal oscillator used. (typ. 10 ∼ 30pF)
MS0174-E-00
- 18 -
2002/09