AK7756 Datasheet, PDF (8/27 Pages) Asahi Kasei Microsystems – DSP with Mono CODEC + Mic/Lineout Amp

[AK7756]
13 LRCK
I/O Audio channel select Pin
14 BICK
I/O Audio Serial Data Clock Pin
15 SDIN1
I Audio Serial Data Input 1 Pin
16 IRSTN
I
Reset Pin (active low) The AK7756VF must be reset once upon power-up.
“H”: Power-up, “L”: Initialize the control register.
17 JX1
I Conditional Jump Pin1
18 AOUT
O Analog Output Outputs. Outputs VSS2 during initial reset.
19 MPRF
O
Output Pin for Ripple Filter of MICBIAS Circuit
Connect 1.0μF capacitor to VSS2. Outputs AVDD during initial reset.
20 VCOM
O
Analog Common Voltage Output Pin
Connect 0.1μF and 2.2μF capacitor to VSS2. Outputs VSS2 during initial reset.
21 VSS2
- Ground Pin
22 AVDD
- Analog Power Supply Pin 3.0 ∼ 3.6V
23 AVDD
- Analog Power Supply Pin 3.0 ∼ 3.6V
24 MICBIAS
O Microphone bias. Outputs Hi-Z during initial reset.
25 ^AIN
INP
I Single-ended Analog Input pin (MDIF bit = “0”)
I Positive Microphone input pin (MDIF bit = “1”)
26 INN
I Negative Microphone input pin (MDIF bit = “1”)
27 LFLT
28 I2CSEL
Output Pin for Loop Filter of PLL Circuit
O This pin must be connected to VSS2 with 8.2KΩ and 33nF in series.
Outputs “L” during initial reset.
I μP Control Mode Select Pin
“H”: I²C, “L”: SPI
29 XTO
O Master Clock Output Pin. Outputs Hi-Z during initial reset.
30 XTI
I External Master Clock Input Pin
Note 1. All digital input pins must not be left floating.
Note 2. DVDD or VSS1 voltage must be input to the I2CSEL pin.
Note 3. All analog input pins (INP/AIN, INN pins) must be supplied signal via AC-coupling capacitor.
Note 4. Analog output pins (AOUT pin) must deliver signal via AC-coupling capacitor
■ Handling of Unused Pin
The unused I/O pins must be processed appropriately as below.
Classification
Analog
Digital
Pin Name
MICBIAS, INP/AIN, INN, AOUT, MPRF
SDOUT1, STO/RDY/SDOUT1, SDOUT2/RDY,
SDOUT3/EEST/ SI, XTO
EXTEEP/RQN, SDIN1, XTI, JX0/SDIN2, JX1
Setting
These pins must be open.
These pins must be open.
These pins must be connected to VSS1.
MS1218-E-00-PB
8
2010/08