AK7755EN_16 Datasheet, PDF (10/109 Pages) Asahi Kasei Microsystems – DSP with Mono ADC Stereo CODEC + Mic/Lineout Amp

[AK7755]
ChipSelectN Pin for SPI Interface (I2CSEL pin = “L”)
CSN
I ▪ Set this pin to “H” when the AK7755 is in power-down mode or when the
20
microprocessor I/F is not used.
CAD
I I2CBUS Address Pin (I2CSEL pin = “H”)
MATSEL
I EEPROM Mat Select Pin (I2CSEL pin = EXTEEP pin = “H”)
21 AVDD
- Analog Power Supply Pin: (typ. 3.3V)
Power-down N Pin
22 PDN
I ▪ The AK7755 can be powered-down by this pin.
▪ Set this pin to “L” upon power-up the AK7755.
LDO Select Pin
23 LDOE
I
LDOE pin = “L”: 24 pin External 1.2V Power Supply
LDOE pin = “H”: 24 pin LDO Output (LDO Drive)
The LDOE pin must be fixed to “L(DVSS)” or “H(TVDD)”.
DVDD
I Power Supply Pin for Digital Core: (typ. 1.2V)
24 _AVDRV
LDO Output (LDOE pin = “H”)
O Connect a 1uF capacitor between this pin and DVSS. This pin must not be
connected to an external circuit.
25 DVSS
- Ground Pin 0V
26 OUT2
O Line Output 2 Pin
27 OUT3
O Line Output 3 Pin
28 OUT1
O Line Output 1 Pin
29 AVDD
- Analog Power Supply Pin: 3.3V (typ)
30 AVSS
- Analog Ground Pin 0V
31
IN4/INN2
DMCLK2
I ADC Input Pin (AINE bit = “1”)
O Digital MIC Clock Output 2 Pin (DMIC2 bit = “1”)
32
IN3/INP2
DMDAT2
I ADC Input Pin (AINE bit = “1”)
I Digital MIC Clock Input 2 Pin (DMIC2 bit = “1”)
33
IN2/INN1
DMCLK1
I ADC Input Pin (AINE bit = “1”)
O Digital MIC Clock Output 1 Pin (DMIC1 bit = “1”)
34
IN1/INP1
DMDAT1
I ADC Input Pin (AINE bit = “1”)
I Digital MIC Clock Input 1 Pin (DMIC1 bit = “1”)
35 LIN
I Mono ADC Input Pin
36 AVDD
- Analog Power Supply Pin: 3.3V (typ)
Note 1. All digital input pins must not be allowed to float. If analog input pins are not used, leave them open.
The I2CSEL pin, LDOE pin and CAD/MATSEL pin should be fixed to “L” (DVSS) or “H”
(TVDD).
■ Handling of Unused Pin
The unused I/O pins must be processed appropriately as below.
Classification Pin Name
LIN, IN1/INP1/DMDAT1, IN2/INN1/DMCLK1,
Analog
IN3/INP2/DMDAT2, IN4/INN2/DMCLK2, OUT1, OUT2,
OUT3
STO/RDY, CLKO, XTI, XTO, SDOUT3/ JX2/MAT1,
SDOUT2/JX3/MAT0, SDOUT1/EEST, SO/SDA, LRCK,
Digital
BICK
I2CSEL, SDIN2/JX1, SDIN1/JX0,
SCLK/SCL, SI/EXTEEP, CSN/CAD/MATSEL, LDOE
Setting
These pins must be open.
These pins must be open.
These pins must be
connected to DVSS.
014006643-E-00
- 10 -
2014/10