ak4650 AKM Semiconductor, Inc., ak4650 Datasheet - Page 20

• Manufacturer Part Number: ak4650
• Description: 16bit 6 Codec With Mic/hp/spk-amp & Tsc
• Manufacturer: AKM Semiconductor, Inc.

L
The AK4650 requires a master clock (MCLK). This master clock is input to the AK4650 by the following three methods:
When using a X’tal oscillator, there should be capacitors between XTI/XTO pins and DVSS (Figure 12).
(1) X’tal Oscillator (PLL1 pin = “L”)
MS0502-E-01
Master Clock Source
X’tal Oscillator
(PLL1 pin = “L”)
External Clock Direct Input
(PLL1 pin = “L”)
External Clock Direct Input
(PLL1 pin = “H”)
AC Coupling Input
(PLL1 pin = “L”)
(1) Connect a X’tal oscillator between XTI and XTO pins.
(2) Input an external CMOS-level clock to the XTI pin.
(3) Input an external clock whose amplitude is greater than 50%DVDD to the XTI pin with AC coupling.
Note 34. The capacitor values depend on the X’tal oscillator used. (C : typ. 10 30pF)
Master Clock
C
C
Table 1. Master Clock Status by PR5 bit and MCKPD bit
XTO
XTI
(Figure 12)
(Figure 13)
(Figure 14)
(Figure 15)
OPERATION OVERVIEW
MCKPD = "0"
25k (typ)
Figure 12. X’tal mode
PLL1 = "L"
PR5 = "0"
Clock isn’t input to MCKI pin.
Clock is input to MCKI pin.
Clock is input to MCKI pin.
Clock is input to MCKI pin.
MCKI pin is fixed to “H”.
MCKI pin is fixed to “H”.
MCKI pin is fixed to “L”.
MCKI pin is fixed to “L”.
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MCKI pin is Hi-Z
MCKI pin is Hi-Z
Oscillator OFF
Oscillator ON
Status
PLL1 = "L"
AK4650
PR5 bit
0
1
0
1
1
1
0
0
0
0
0
1
MCKPD bit
0/1
0/1
0
1
0
0
1
0
0
1
0
1
[AK4650]
2007/04