
ASAHI KASEI
[AKD4140-B]
<KM079203>
2009/10
- 2 -
Evaluation Board
Manual
Operating sequence
(1)
Set up the power supply lines.
[5V] (Red) = 5V
[3.3V] (Orange)=3.3V (open when JP1 is shorted)
[GND] (Black) = 0V
(2)
Set up the switches and jumpers.
Refer to the following sections.
(3)
Power on.
The AK4140 should be reset once by bringing PDN (SW1) “L” upon power-up.
Toggle switch set-up
SW1
AK4140_PDN
Reset switch for AK4140. Set to “H” during normal operation. Bring to “L” once after the
power is supplied.
SW3
DAC/DIT_PDN
Reset switch for DAC and DIT. Set to “H” during normal operation. Bring to “L” once
after the power is supplied.
Table 1. Toggle switch set-up
LED indication
LE1
INT0
Turn on when INT0 pin goes to “H”.
LE2
INT1
Turn on when INT1 pin goes to “H”.
Table 2. LED indication
Jumper set-up.
No.
Jumper Name
Function
1 REG
Power supply setup.
Short: Regulator (default)
Open: +3.3V Jack
2 XTE
Set-up of X’tal.
Short: GND
Open: X’tal (default)
3 MCLK
Set-up of MCLK.
XTL: X’tal (default)
EXT: EXT
4 BICK
Set-up of BICK.
Open: Master mode (default)
1/2: 128fs
1/4: 64fs
5 LRCK
Set-up of BICK.
Open: Master mode (default)
1/256: 256fs
1/512: 512fs
6 TX
Set-up of TX0 output circuit.
OPT : Optical (default)
BNC : BNC
7 TDMIN
Set-up of TDMIN input circuit.
TDMIN: TDMIN
GND: GND (default)
Table 3. Jumper set-up