AK7746 datasheet(5/62 Pages) AKM

Part #	AK7746

Description	Audio DSP with 5-channel 24-bit ADC and Input Mux

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Manufacturer	AKM [Asahi Kasei Microsystems]

Direct Link	http://www.akm.com

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5 / 62 page

[ASAHI KASEI]

[AK7746]

[MS0369-E00]

- 5 -

2004/12

(2) Pin function

Pin No

Pin name

I/O

Function

Classification

1

AINR5

I ADC1 or ADC2 Rch single ended analog input 5

2

AINL5

I ADC1 or ADC2 Lch single ended analog input 5

3

AINR6

I ADC1 or ADC2 Rch single ended analog input 6

4

AINL6

I ADC1 or ADC2 Lch single ended analog input 6

5

AINR7

I ADC1 or ADC2 Rch single ended analog input 7

6

AINL7

I ADC1 or ADC2 Lch single ended analog input 7

7

AINR8

I ADC1 or ADC2 Rch single ended analog input 8

8

AINL8

I ADC1 or ADC2 Lch single ended analog input 8

Analog input

9

BVSS

- Analog ground (Silicon base ground level)

Connect with AVSS pin

Analog Power supply

10

DVSS

- Digital Ground 0.0V

11

DVDD

- Digital power supply 3.3V(typ)

Digital Power supply

12

CS

I

Chip select pin for Microcomputer interface. (Internal pull-down)

Normaly leave OPEN or connect with DVSS.

CS =”H” : SI can not input, SO,RDY,DRDY = Hi-Z.

13

RQ

I

Write request pin for Microcomputer interface.

RQ =”L” : Microcomputer interface enable.

For run-time data read out: RQ =”H”.

When Microcomputer interface is not used or during initial reset, leave

RQ =”H”.

14

SI

I

Serial data input and serial data output control pin for Microcomputer

interface.

When SI is not used, leave SI=”L”.

15

SCLK

I Serial data clock pin for Microcomputer interface.

When SCLK is not used, leave SCLK=”H”.

16

SO

O Serial data output pin for Microcomputer interface.

CS =”H” : SO = Hi-Z.

17

RDY

O Data write ready output pin for Microcomputer interface.

CS =”H” : RDY = Hi-Z.

18

DRDY

O Output data ready pin for Microcomputer interface.

CS =”H” : DRDY = Hi-Z.

Microcomputer

Interface

19

INIT_RESET

I Reset pin ( for initialization )

Used for initialization of the AK7746. When changing CKS1 or CKS0 and

changing XTI input frequency, this pin setting is necessary.

20

S_RESET

I System Reset pin

Reset

21

SDIN4/JX2

I DSP serial data input pin / External condition jump pin

(Internal pull-down )

* Compatible with MSB justified 24 bits / LSB justified 24,20 and 16 bits

* It can change its function as a conditional jump pin JX2 by control register

setting (JX2_E).

Digital section

Serial input data /

Conditional input

22

SDIN3/JX1

I DSP serial data input pin / External condition jump pin

(Internal pull-down )

* Compatible with MSB justified 24 bits / LSB justified 24,20 and 16 bits

* It can change its function as a conditional jump pin JX1 by control register

setting (JX1_E).

Digital section

Serial input data /

Conditional input

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