AK4635 AKM [Asahi Kasei Microsystems], AK4635 Datasheet - Page 30

• Manufacturer Part Number: AK4635
• Description: 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

b) PLL reference clock: BICK or LRCK pin
The external clocks (MCKI, BICK and FCK) should always be present whenever the ADC or DAC or SPK or
Programmable Filter is in operation (PMADC bit = “1”, PMDAC bit = “1”, PMSPK bit = “1”, PMPFIL bit = “1”). If these
clocks are not provided, the AK4635 may draw excess current and it is not possible to operate properly because utilizes
dynamic refreshed logic internally. If the external clocks are not present, the ADC, DAC, SPK and Programmable Filter
should be in the power-down mode.(PMADC = PMDAC = PMPFIL bits = “0”).
Rev. 0.6
Sampling frequency corresponds to 7.35kHz to 48kHz by changing FS3-0 bits.
Figure 25 PLL Slave Mode 2 (PLL Reference Clock: BICK pin)
Figure 26. PLL Slave Mode 2 (PLL Reference Clock: FCK pin)
AK4635
AK4635
MCKO
MCKI
BICK
FCK
SDTO
SDTI
MCKO
MCKI
BICK
FCK
SDTO
SDTI
16fs, 32fs, 64fs
≥16fs
- 30 -
1fs
1fs
BCLK
FCK
SDTI
SDTO
BCLK
FCK
SDTI
SDTO
DSP or μP
DSP or μP
(Table
6)
[AK4635]
2007/10