ASAHI KASEI
[AKD4642EN-B]
AKD4642EN-B
AK4642EN Evaluation board Rev.0
GENERAL DESCRIPTION
AKD4642EN-B is an evaluation board for the AK4642EN, 16bit CODEC with built-in MIC/HP/SPK
amplifier. The AKD4642EN can evaluate A/D converter and D/A converter separately in addition to
loop-back mode (A/D
→
D/A). The AKD4642EN also has the digital audio interface and can achieve the
interface with digital audio systems via opt-connector.
Ordering guide
AKD4642EN-B
--- Evaluation board for AK4642EN
(Cable for connecting with printer port of IBM-AT compatible PC and control
software are packed with this. This control software does not operate on Windows
NT.)
FUNCTION
•
DIT/DIR with optical input/output
•
10pin Header for serial control mode
Regulator
3.3V
Control Data
LIN1/
RIN1
BEEP
LIN2/
RIN2
HP
LOUT/
ROUT
AK4114
Opt In
Opt Out
DSP
10pin Header
GND
5V
AK4642EN
10pin Header
Figure 1. AKD4642EN Block Diagram
* Circuit diagram and PCB layout are attached at the end of this manual
<KM079300>
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2005/06
ASAHI KASEI
[AKD4642EN-B]
1. Evaluation Board Manual
Operation sequence
1) Set up the power supply lines.
[VCC]
(red)
= 5.0V
[AGND] (black)
= 0V
[DGND] (black)
= 0V
: for logic
: for analog ground
: for logic ground
Each supply line should be distributed from the power supply unit.
3.3V is supplied to AK4642EN and AK4114 via the regulator.
2) Set up the evaluation mode, jumper pins.
(See the followings.)
3) Power on.
The AK4642EN and AK4114 should be reset once bringing SW1 “L” upon power-up.
Evaluation mode
(1) Slave mode
(1-1) Evaluation of Recording block (MIC, ADC) using DIT of AK4114
(1-2) Evaluation of Playback block (HP, SPK, LOUT) using DIR of AK4114
(1-3) Evaluation of Loop-back using AK4114 <Default>
(1-4) All interface signals including master clock are fed externally.
The AK4114’s audio interface format is fixed to I
2
S compatible.
(1-1) Evaluation of Loop-back using DIT of AK4114
PORT2 (DIT) and X1 (X’tal) are used. DIT generates audio bi-phase signal from received data and which is
output through optical connector (TOTX141). Nothing should be connected to PORT1 (DIR) and PORT3
(DSP).
JP6
BICK2
JP7
LRCK2
JP8
LRCK
JP9
MCLK
JP10
BICK
JP11
SDTI
DIR
ADC
(1-2) Evaluation of Playback block using DIR of AK4114
PORT1 (DIR) is used. Nothing should be connected to PORT3 (DSP).
JP6
BICK2
JP7
LRCK2
JP8
LRCK
JP9
MCLK
JP10
BICK
JP11
SDTI
DIR
ADC
The AK4114 operates at fs of 32kHz or more. If the fs is slower than 32kHz,
any other evaluation mode without using DIR should be used.
<KM079300>
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ASAHI KASEI
[AKD4642EN-B]
(1-3) Evaluation of Loop-back using AK4114 <Default>
X’tal oscillator (X1) is used. Nothing should be connected to PORT1 (DIR) and PORT3 (DSP).
JP6
BICK2
JP7
LRCK2
JP8
LRCK
JP9
MCLK
JP10
BICK
JP11
SDTI
DIR
ADC
The AK4114 operates at fs of 32kHz or more. If the fs is slower than 32kHz,
any other evaluation mode without using DIR should be used.
(1-4) All interface signals including master clock are fed externally.
PORT3 (DSP) is used. Nothing should be connected to PORT1 (DIR).
JP6
BICK2
JP7
LRCK2
JP8
LRCK
JP9
MCLK
JP10
BICK
JP11
SDTI
DIR
ADC
(2) Master mode
(2-1) Evaluation of Recording block using MCLK of AK4114
(2-2) Master clock is fed externally
(2-1) Evaluation of Loop-back using MCLK of AK4114
X’tal oscillator (X1) is used. Nothing should be connected to PORT1 (DIR) and PORT3 (DSP). It can be
evaluated at internal loop-back mode (LOOP bit = “1”). It is possible to evaluate at various sampling frequencies
using built-in AK4642EN’s PLL.
JP6
BICK2
JP7
LRCK2
JP8
LRCK
JP9
MCLK
JP10
BICK
JP11
SDTI
DIR
ADC
(2-2) Master clock is fed externally
PORT3 (DSP) is used and MCLK is fed from PORT3. Nothing should be connected to PORT1 (DIR). It can be
evaluated at internal loop-back mode (LOOP bit = “1”). It is possible to evaluate at various sampling frequencies
using built-in AK4642EN’s PLL.
JP6
BICK2
JP7
LRCK2
JP8
LRCK
JP9
MCLK
JP10
BICK
JP11
SDTI
DIR
ADC
<KM079300>
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2005/06
ASAHI KASEI
[AKD4642EN-B]
Other jumper pins set up
1. JP1 (GND) : Connection between AGND and DGND.
OPEN : Both grounds are separated on board.
SHORT : Both grounds are connected on board. <Default>
2. JP2,JP3 : Connection of mic power.
OPEN: Mic power is not connected.
SHORT : Mic power is connected. <Default>
3. JP4,JP5 : Select speaker type.
OPEN : Piezo speaker
SHORT : Dynamic speaker <Default>
4. JP12 : Select speaker type.
Dynamic: Dynamic speaker <Default>
Piezo: Piezo speaker
The function of the toggle SW
Upper-side is “H” and lower side is “L”.
[SW1] (PDN): Power down of AK4642EN and AK4114. Keep “H” during normal operation.
Indication for LED
[LED1] (ERF): Monitor INT0 pin of the AK4114. LED turns on when some error has occurred to AK4114.
<KM079300>
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ASAHI KASEI
[AKD4642EN-B]
Serial Control
The AK4642EN can be controlled via the printer port (parallel port) of IBM-AT compatible PC. Connect PORT4
(CTRL) with PC by 10 wire flat cable packed with the AKD4642EN. When I
2
C bus mode is used, PORT4 should be
directly connected to the I
2
C bus on the system.
Connect
PC
CSN
SCL/CCLK
SDA/CDTI
AKD4642EN-B
10 wire
flat cable
10pin
Connector
10pin Header
Figure 2. Connect of 10 wire flat cable
(1) 3-wire Serial Control Mode <Default>
The jumper pins should be set to the following.
JP14
CAD0
JP13
I2C_SEL
JP15
SDA
I2C
3-wire
(2) I
2
C-bus Control Mode
The jumper pins should be set to the following.
(2-1) In case of using CAD0=0 (device address bits).
JP14
CAD0
JP13
I2C_SEL
JP15
SDA
I2C
3-wire
(2-2) In case of using CAD0=1 (device address bits).
JP14
CAD0
JP13
I2C_SEL
JP15
SDA
I2C
3-wire
<KM079300>
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微控制器 MCU
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