AKD4120_06 Datasheet, PDF (3/47 Pages) Asahi Kasei Microsystems – Sample Rate Converter with Mixer and Volume

ASAHI KASEI
[AKD4120]
„ Evaluation mode
The AK4120 has four path modes that interface between two input ports and one output port. Four audio data formats can
be selected independently for each port. Input#1 port supports only slave mode. Input#2 port and output port support slave
mode and master mode. This evaluation board, AKD4120 has a standard optical interface via DIR/DIT and AKM original
10pin interface for AKM’s AD/DA evaluation board. The AKD4120 can select either optical interface or 10pin interface
for each port.
Set the evaluation mode by the following operation sequence.
1) Control I/F mode
2) Path mode and Clock mode
3) Audio data format
1. Control I/F mode
Control I/F mode is set by JP14 and S1. Attached control software is written for using 3-wire serial and Chip Address
CAD1, CAD0 (CAD1, CAD0 = ”10”). See the section of “DIP switch setup” and “Jumper list”. Set-up of JP14 and
S1 is shown below.
Jumper No.
DIP switch No.
JP14
S1: No.4
S1: No.5
Set-up
CSN
OFF
OFF
ON 1 2 3 4 5 6 7
S1
OFF
S1 (AK4120) set-up: Audio data format: 24bit, MSB justified (Default)
* In case of 3-wire serial (I2C = “OFF”), lower bit is set up by CAD0 pin, but upper bit is fixed to “1”. Therefore, it is not
needed to set up CAD1 pin.
<KM066802>
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2006/12