AKD4420-SC Datasheet, PDF (3/22 Pages) Asahi Kasei Microsystems – AK4420 Evaluation Board Rev.2

[AKD4420-SC]





„ Operation sequence
1) Set up the power supply lines.
Each supply line should be distributed from the power supply unit.
Name
of jack
VCC1
(Note 1)
VDD1
Color
of jack
Red
Red
Typ
Voltage
+12V
+5V
Voltage
Range
+7∼+15V
+4.5∼+5.5V
Using
AVDD, DVDD, TVDD, OVDD of
AK4115 and VCC of Logic circuit
(Regulator:T2)
VDD of AK4420
Default Setting
Connected to +12V
Connected to +5V
CVDD1
Red
+5V
+4.5∼+5.5V CVDD of AK4420
Connected to +5V
AGND2
REG
(Note 2)
Black
Red
0V
+12V
0V
Ground
+7V~+15V VDD, CVDD of AK4420
(Regulator:T1)
Table 1.Set up of power supply lines
Connected to GND
(Should be connected)
Open
Note 1 ) In case of using +3.3V power supply to connect VCC1, It is possible to supply the voltage to AK4115 and
the Logic circuit without using Regulator.



In this case, change to R36: OpenÆ Short (0Њ); R34,R35: Short (0Њ) Æ Open
Note 2 ) In case of using +12V power supply to connect REG, Use regulator: T1 can supply AK4420 with clean
voltage.



In this case, change to R25,R44: Short (0Њ)Æ Open; R37,R43:OpenÆ Short (0Њ); VDD, CVDD should
be open.
2) DIP Switch setting:
Refer to Table 2 and Table 3
3) Power Down:
The AK4115 should be reset once by bringing SW2 (AK4115 PDN) “L” upon power-up.
„ Evaluation mode
1. Using DIR (Optical Link)
The DIR generates MCLK, BICK, LRCK and SDATA from the received data through optical connector (PORT1:
TORX141). It is possible to evaluate the AK4420 by using CD disk.
Setting: R19: Open Æ470Ω; R33: short (0Ω)ÆOpen
2. Using DIR (COAX) (Default)
The DIR generates MCLK, BICK, LRCK and SDATA from the received data through BNC connector (J3). It is
possible to evaluate the AK4420 by using CD disk.
Setting: R19: Open;
R33: short (0Ω); (Default)
ˎ COAX is recommended for an evaluation of the Sound quality.
3. Supply all interface signals that includ master clock via PORT2 from external equipments..
Setting:
R11: 5.1ΩÆOpen
R12, R13, R14: 51ΩÆOpen
R15, R16, R17, R18: OpenÆ51Ω or short (0Ω)
Note) The above work of removing (open) or shorting resistors need to modify the connection by soldering.
KM091904







2009/07