ASAHI KASEI

[AKD4112B]

2002/12

- 1 -

GENERAL DESCRIPTION

AKD4112B is the evaluation board for AK4112B, 96kHz digital audio transceiver. This has optical and
BNC connector to interface with other digital audio equipment. The AKD4112B is also available to output
analog data via on-board DAC, AK4394.

Ordering guide

AKD4112B --- Evaluation board for AK4112B

(A cable for connecting with printer port of IBM-AT compatible PC
and a control software are packed with this.)

FUNCTION

Digital interface

-S/PDIF :

4 channel input ( optical or BNC)
1 channel output ( optical or BNC)

- Serial audio data I/F :

1 output ( for DIR data output. 10-pin port)

Analog interface

-DAC output :

Differential stereo output (Lch/Rch)

10pin header for serial control interface

RX0

AK4112B

DAC(AK4394)

Analog

Buffer

Control

3.3V

GND

Opt

Serial Data out

GND

+12V

-12V

Fig 1. AKD4112B Block Diagram

*Circuit diagram and PCB layout are attached at the end of this manual.

AK4112B Evaluation Board Rev.A

AKD4112B

ASAHI KASEI

[AKD4112B]

2002/12

- 2 -

PORT2

uP-I/F

CSN

CCLK

CDTI

CDTO

Evaluation modes

(1) Evaluation for DIR (Digital output)

S/PDIF in(optical or BNC) AK4112B Serial Data out(10pin port)

(2) Evaluation for DIR(analog output via DAC)

S/PDIF in(optical or BNC) AK4112B DAC(AK4394) Analog out(Balance XLR)

Operating sequence

(1) Set up the power supply lines.
[-12V] (Blue) = -12 ~ -15V

[+12V] (Orange) = +12 ~ +15V
[Analog 5V] (Red) = 5V : Open when the JP15(REG5V) is short.
[AGND] (Black) = 0V
[Digital 5V] (Red) = 5V
[DGND] (Black) = 0V
[Analog 3V] (Green) = 3.3V : Open when the JP13(REG3V) is short.
[AGND2] (Black) = 0V
[Digital 3V] (Green) = 3.3V
Each supply line should be distributed from the power supply unit.

(2) Set up the evaluation mode and jumper pins. (See p.3.)

(3) Connect cables.

(4) Power on.
The AK4112B and AK4394 should be reset once bringing PDN(SW3) "L" upon power-up.

(5) Set up software.
Both the serial and parallel mode are available for AK4112B. AK4394 is fixed to

serial control mode. In the serial mode, The IBM-AT compatible PC can control
both AK4112B and AK4394 by using the printer port and PORT2 on the AKD4112B.
Connect PORT2 (uP-I/F) with PC by 10-line flat cable packed with the AKD4112B.

Take care of the direction of connector. There is a mark at pin#1.

The pin layout of PORT2 is as Figure 2. Figure 2. PORT2 pin layout

Connection of PORT2

CSN

CDTI/SDA

CDTO/ACK

CCLK/SCL

AKD4114

10 pin Header

10 pin Connector

10 wire flat cable

Connect

ASAHI KASEI

[AKD4112B]

2002/12

- 3 -

Jumper set up. (See the datasheet of AK4112B)

No.

Jumper Name

Function

RX0

RX0 input circuit set-up.
OPT : Optical (default)
BNC : BNC

SDA/CDTO

SDA/CDTO pin set-up
Serial mode : Short both "SDA" and "CDTO/CM0=L". (default)
Parallel mode : Select CM0="H" or CM0="L" to set CM0

Don't care

5,6,8

RX4-7

Don't care

DIT MCLK

Don't care

DIR MCLK ,

MCKO set-up for PORT4(DIR; DAC)
MCKO1 : MCKO1 of AK4112B (default)
MCKO2 : MCKO2 of AK4112B

TX0

Don't care

TX1

Don't care

BNC

Don't care

4112B VD

Power supply source set-up for DVDD of AK4112B.
D3V : from Digital 3V Jack (default)
A3V : from Analog 3V Jack.

REG3V

Power supply source set-up for AVDD of AK4112B.
Open : from Analog 3V Jack (default)
Short : from the regulator. Do not connect anything the Analog 3V Jack.

4395_DVDD

Power supply source set-up for DVDD of AK4394.
D5V : from Digital 5V Jack (default)
A5V : from Analog 5V Jack

REG5V

Power supply source set-up for AVDD of AK4394.
Open : from Analog 5V Jack (default)
Short : from the regulator. Do not connect anything the Analog 5V Jack.

AGND2/DGND

Connection of AGND2(AK4112B AVSS) and DGND(AK4112B DVSS)
Open : Separate two grounds.
Short : Connect two grounds. (default)

AGND2/DGND

Connection of AGND(AK4394 AVSS) and DGND(AK4112B DVSS)
Open : Separate two grounds. (default)
Short : Connect two grounds.

ASAHI KASEI

[AKD4112B]

2002/12

- 4 -

DIP switch(SW1) set-up : -off- means "L"

No.

Switch Name

Function

IPS0

Don't care

DIF0

DIF0 pin set-up (for parallel mode)

DIF1

DIF1 pin set-up (for parallel mode)

DIF2

DIF2 pin set-up (for parallel mode)

IPS1/IIC

Don't care

P/SN

P/SN pin set-up. "H": parallel mode, "L": serial mode.

XTL0

Don't care

XTL1

Don't care

DIP switch(SW2) set-up : -off- means "L"

No.

Switch Name

Function

CM1

CM1 pin set-up (for parallel mode)

OCKS1

OCKS1 pin set-up (for parallel mode)

OCKS0

OCKS0 pin set-up (for parallel mode)

TEST1

Don't care

(reserved)

Toggle switch set-up

PDN

Reset switch for AK4112B and AK4394. Set to "H" during operation. Bring to "L" once
after the power is supplied.

LED indication

INT0

Bright when ERF pin goes to "H".

INT1

Bright when FS96 pin goes to "H".

Set-up of AK4394 (for the evaluation via DAC. Refer the AK4394 datasheet)

In case of evaluating via DAC(AK4394), the AK4394 needs to be controlled by serial control. The default set-up of
AK4394 audio format is 16bit right justified, but AK4112B is left justified slave mode. Please adjust those two audio
formats. In detail, please refer those datasheets.

n

Set-up of AK4112B (Refer the AK4394 datasheet)

1. MCKO1/2 output

No. OCKS1 OCKS0

MCKO1

MCKO2

X'tal

fs (kHz)

256fs

32, 44.1, 48, 96

Default

256fs

128fs

256fs

32, 44.1, 48, 96

512fs

256fs

512fs

32, 44.1, 48

Test Mode

Table 1. Master Clock Frequency Select

ASAHI KASEI

[AKD4112B]

2002/12

- 5 -

2. Clock operation mode

Mode

CM1

CM0

UNLOCK

PLL

X'tal

Clock source

SDTO

ON(Note)

PLL

Default

OFF

X'tal

DAUX

PLL

X'tal

DAUX

X'tal

DAUX

ON: Oscillation (Power-up), OFF: STOP (Power-down)

Table 2. Clock Operation Mode select

3. Audio interface format

LRCK

BICK

DIF2 DIF1 DIF0

DAUX

SDTO

I/O

24bit, Left justified

16bit, Right justified

H/L

64fs

24bit, Left justified

18bit, Right justified

H/L

64fs

24bit, Left justified

20bit, Right justified

H/L

64fs

24bit, Left justified

24bit, Right justified

H/L

64fs

24bit, Left justified

H/L

64fs

Default

24bit, I

L/H

64fs

24bit, Left justified

H/L

64-128fs

24bit, I

L/H

64-128fs

Table3. Audio Data Format

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: AKD4112B