AK4120 Datasheet, PDF (17/30 Pages) Asahi Kasei Microsystems – Sample Rate Converter with Mixer and Volume

ASAHI KASEI
[AK4120]
The frequency of IMCLK1, IMCLK2, and OMCLK are fixed based on the sampling rate and clock speed (256fs/512fs).
IMCKS1, IMCKS2 and OMCKS bits in register 01H select clock speed.
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96kHz
MCLK (MHz)
256fs
512fs
8.1920
16.384
11.2896
22.5792
12.2880
24.576
22.5792
N/A
24.5760
N/A
Table 5. System Clock Example
BICK (MHz)
64fs
2.0480
2.8224
3.0720
5.6448
6.1440
n Volume
AK4120 has two digital volumes (Volume#1 and Volume#2). Volume#1 can control the volume level of data from
Input#1 while in Path Mode 0 or from Input#2 while in Path Mode 1. It then passes this data through SRC block.
Volume#2 can control the volume level of data from Input#2 while in Path Mode 0 and Path Mode 3, or from Input#1
in Path Mode 2. These volume ranges are from –83.25dB to 12dB in 0.75dB steps. The volume level and mute of each
channel can be controlled by register 3-6H.
MS0134-E-00
- 17 -
2002/1