AKD5373-A Datasheet, PDF (5/24 Pages) Asahi Kasei Microsystems – Evaluation board Rev.2 for AK5373

[AKD5373-A]
(2) External Audio Processing Mode
Evaluation of using external digital audio interface of AK5373
USB1 (USB Connector) and PORT6 (DSP) are used. Nothing should be connected to USB2 (USB Connector).
L-ch MIC
R-ch MIC
EEP-ROM
SPI I/F
VREFP VCOM AVDD VSS1
CSN SCK EPSO EPSI
RSTN SUSN DVDD VSS2 VSS3
MPWR
PMMP
VREF
MICLP
PMADL
Control
Decode
PMADL or PMADR
MICLN Gain: 0/+6/+12/+18/+24/+30/+36dB
MICRP
24bit
ADC
Digital
Volume
MICRN
MGAIN0
MGAIN1
MGAIN2
PMADR
PLL
(System/Audio)
USB
SIE
USB
Tx/Rx
Audio
Stream
Control
Ext
Audio
I/F
SDIN or SDOUT
DP
DN
SDTI
Audio I/F
I2S or MSB justified
SDTO
LRCK=fs
BICK=64fs
PORT6
DSP
MCLK=
512fs or 256fs
CLKO
CKM = “H”
VREFN
LFLTAD
LMUTE RMUTE
LFLTAD
CLKDRV
XTI
XTO
24MHz
Figure 6. External Audio Processing Mode
„ Set up gain of MIC-Amp.
The AK5373 has a gain amplifier for microphone inputs. The gain of MIC-Amp can be selected by PORT4 (MGAIN).
Default input gain is 0dB
PORT4
Pin1, 2
OPEN
OPEN
OPEN
OPEN
SHORT
SHORT
SHORT
SHORT
PORT4
Pin3, 4
OPEN
OPEN
SHORT
SHORT
OPEN
OPEN
SHORT
SHORT
PORT4
Pin5, 6
OPEN
SHORT
OPEN
SHORT
OPEN
SHORT
OPEN
SHORT
MGAIN2
pin
L
L
L
L
H
H
H
H
MGAIN1 MGAIN0
pin
pin
L
L
L
H
H
L
H
H
L
L
L
H
H
L
H
H
Input Gain
Follow the EEPROM Setting
0dB
+6dB
+12dB
+18dB
+24dB
+30dB
+36dB
(Default)
Table 1 Microphone Input Gain
[KM101503]
-5-
2010/08