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AKD7756HFS

DSP with Mono CODEC + Mic/Lineout Amp

Asahi Kasei Microdevices 

[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

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